Add PBR support

Now can configure metalness and roughness for parts, however, the PBR render isn't enabled in the code currently.

ACKNOWLEDGEMENTS.html

@@ -556,3 +556,55 @@ https://www.reddit.com/r/gamedev/comments/5iuf3h/i_am_writting_a_3d_monster_mode
     http://www.gdcvault.com/play/1020583/Animation-Bootcamp-An-Indie-Approach
 </pre>
 
+<h1>Qt3D</h1>
+<pre>
+    /****************************************************************************
+    **
+    ** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
+    ** Contact: https://www.qt.io/licensing/
+    **
+    ** This file is part of the Qt3D module of the Qt Toolkit.
+    **
+    ** $QT_BEGIN_LICENSE:BSD$
+    ** Commercial License Usage
+    ** Licensees holding valid commercial Qt licenses may use this file in
+    ** accordance with the commercial license agreement provided with the
+    ** Software or, alternatively, in accordance with the terms contained in
+    ** a written agreement between you and The Qt Company. For licensing terms
+    ** and conditions see https://www.qt.io/terms-conditions. For further
+    ** information use the contact form at https://www.qt.io/contact-us.
+    **
+    ** BSD License Usage
+    ** Alternatively, you may use this file under the terms of the BSD license
+    ** as follows:
+    **
+    ** "Redistribution and use in source and binary forms, with or without
+    ** modification, are permitted provided that the following conditions are
+    ** met:
+    **   * Redistributions of source code must retain the above copyright
+    **     notice, this list of conditions and the following disclaimer.
+    **   * Redistributions in binary form must reproduce the above copyright
+    **     notice, this list of conditions and the following disclaimer in
+    **     the documentation and/or other materials provided with the
+    **     distribution.
+    **   * Neither the name of The Qt Company Ltd nor the names of its
+    **     contributors may be used to endorse or promote products derived
+    **     from this software without specific prior written permission.
+    **
+    **
+    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+    **
+    ** $QT_END_LICENSE$
+    **
+    ****************************************************************************/
+</pre>

resources.qrc

@@ -10,6 +10,8 @@
     <file>shaders/default.frag</file>
     <file>shaders/default.core.vert</file>
     <file>shaders/default.core.frag</file>
+    <file>shaders/pbr.vert</file>
+    <file>shaders/pbr.frag</file>
     <file>ACKNOWLEDGEMENTS.html</file>
     <file>AUTHORS</file>
     <file>CONTRIBUTORS</file>

shaders/default.core.vert

@@ -3,10 +3,14 @@ in vec4 vertex;
 in vec3 normal;
 in vec3 color;
 in vec2 texCoord;
+in float metalness;
+in float roughness;
 out vec3 vert;
 out vec3 vertNormal;
 out vec3 vertColor;
 out vec2 vertTexCoord;
+out float vertMetalness;
+out float vertRoughness;
 uniform mat4 projMatrix;
 uniform mat4 mvMatrix;
 uniform mat3 normalMatrix;
@@ -16,5 +20,7 @@ void main()
     vertNormal = normalMatrix * normal;
     vertColor = color;
     vertTexCoord = texCoord;
+    vertMetalness = metalness;
+    vertRoughness = roughness;
     gl_Position = projMatrix * mvMatrix * vertex;
 }

shaders/default.vert

@@ -2,10 +2,15 @@ attribute vec4 vertex;
 attribute vec3 normal;
 attribute vec3 color;
 attribute vec2 texCoord;
+attribute float metalness;
+attribute float roughness;
 varying vec3 vert;
 varying vec3 vertNormal;
 varying vec3 vertColor;
 varying vec2 vertTexCoord;
+varying float vertMetalness;
+varying float vertRoughness;
+varying vec3 vertView;
 uniform mat4 projMatrix;
 uniform mat4 mvMatrix;
 uniform mat3 normalMatrix;

shaders/pbr.frag

@@ -0,0 +1,320 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// Please note that, this file "pbr.frag" is copied and slightly modified from the Qt3D's pbr shader "metalrough.inc.frag"
+// https://github.com/qt/qt3d/blob/5.11/src/extras/shaders/gl3/metalrough.inc.frag
+
+// Exposure correction
+float exposure;
+// Gamma correction
+float gamma;
+
+varying highp vec3 vert;
+varying highp vec3 vertNormal;
+varying highp vec3 vertColor;
+varying highp vec2 vertTexCoord;
+varying highp float vertMetalness;
+varying highp float vertRoughness;
+varying highp vec3 vertView;
+uniform highp vec3 lightPos;
+uniform highp sampler2D textureId;
+uniform highp int textureEnabled;
+
+const int MAX_LIGHTS = 8;
+const int TYPE_POINT = 0;
+const int TYPE_DIRECTIONAL = 1;
+const int TYPE_SPOT = 2;
+struct Light {
+    int type;
+    vec3 position;
+    vec3 color;
+    float intensity;
+    vec3 direction;
+    float constantAttenuation;
+    float linearAttenuation;
+    float quadraticAttenuation;
+    float cutOffAngle;
+};
+int lightCount;
+Light lights[MAX_LIGHTS];
+
+float remapRoughness(const in float roughness)
+{
+    // As per page 14 of
+    // http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
+    // we remap the roughness to give a more perceptually linear response
+    // of "bluriness" as a function of the roughness specified by the user.
+    // r = roughness^2
+    float maxSpecPower;
+    float minRoughness;
+    maxSpecPower = 999999.0;
+    minRoughness = sqrt(2.0 / (maxSpecPower + 2.0));
+    return max(roughness * roughness, minRoughness);
+}
+
+float normalDistribution(const in vec3 n, const in vec3 h, const in float alpha)
+{
+    // Blinn-Phong approximation - see
+    // http://graphicrants.blogspot.co.uk/2013/08/specular-brdf-reference.html
+    float specPower = 2.0 / (alpha * alpha) - 2.0;
+    return (specPower + 2.0) / (2.0 * 3.14159) * pow(max(dot(n, h), 0.0), specPower);
+}
+
+vec3 fresnelFactor(const in vec3 color, const in float cosineFactor)
+{
+    // Calculate the Fresnel effect value
+    vec3 f = color;
+    vec3 F = f + (1.0 - f) * pow(1.0 - cosineFactor, 5.0);
+    return clamp(F, f, vec3(1.0));
+}
+
+float geometricModel(const in float lDotN,
+                     const in float vDotN,
+                     const in vec3 h)
+{
+    // Implicit geometric model (equal to denominator in specular model).
+    // This currently assumes that there is no attenuation by geometric shadowing or
+    // masking according to the microfacet theory.
+    return lDotN * vDotN;
+}
+
+vec3 specularModel(const in vec3 F0,
+                   const in float sDotH,
+                   const in float sDotN,
+                   const in float vDotN,
+                   const in vec3 n,
+                   const in vec3 h)
+{
+    // Clamp sDotN and vDotN to small positive value to prevent the
+    // denominator in the reflection equation going to infinity. Balance this
+    // by using the clamped values in the geometric factor function to
+    // avoid ugly seams in the specular lighting.
+    float sDotNPrime = max(sDotN, 0.001);
+    float vDotNPrime = max(vDotN, 0.001);
+
+    vec3 F = fresnelFactor(F0, sDotH);
+    float G = geometricModel(sDotNPrime, vDotNPrime, h);
+
+    vec3 cSpec = F * G / (4.0 * sDotNPrime * vDotNPrime);
+    return clamp(cSpec, vec3(0.0), vec3(1.0));
+}
+
+vec3 pbrModel(const in int lightIndex,
+              const in vec3 wPosition,
+              const in vec3 wNormal,
+              const in vec3 wView,
+              const in vec3 baseColor,
+              const in float metalness,
+              const in float alpha,
+              const in float ambientOcclusion)
+{
+    // Calculate some useful quantities
+    vec3 n = wNormal;
+    vec3 s = vec3(0.0);
+    vec3 v = wView;
+    vec3 h = vec3(0.0);
+
+    float vDotN = dot(v, n);
+    float sDotN = 0.0;
+    float sDotH = 0.0;
+    float att = 1.0;
+
+    if (lights[lightIndex].type != TYPE_DIRECTIONAL) {
+        // Point and Spot lights
+        vec3 sUnnormalized = vec3(lights[lightIndex].position) - wPosition;
+        s = normalize(sUnnormalized);
+
+        // Calculate the attenuation factor
+        sDotN = dot(s, n);
+        if (sDotN > 0.0) {
+            if (lights[lightIndex].constantAttenuation != 0.0
+             || lights[lightIndex].linearAttenuation != 0.0
+             || lights[lightIndex].quadraticAttenuation != 0.0) {
+                float dist = length(sUnnormalized);
+                att = 1.0 / (lights[lightIndex].constantAttenuation +
+                             lights[lightIndex].linearAttenuation * dist +
+                             lights[lightIndex].quadraticAttenuation * dist * dist);
+            }
+
+            // The light direction is in world space already
+            if (lights[lightIndex].type == TYPE_SPOT) {
+                // Check if fragment is inside or outside of the spot light cone
+                if (degrees(acos(dot(-s, lights[lightIndex].direction))) > lights[lightIndex].cutOffAngle)
+                    sDotN = 0.0;
+            }
+        }
+    } else {
+        // Directional lights
+        // The light direction is in world space already
+        s = normalize(-lights[lightIndex].direction);
+        sDotN = dot(s, n);
+    }
+
+    h = normalize(s + v);
+    sDotH = dot(s, h);
+
+    // Calculate diffuse component
+    vec3 diffuseColor = (1.0 - metalness) * baseColor * lights[lightIndex].color;
+    vec3 diffuse = diffuseColor * max(sDotN, 0.0) / 3.14159;
+
+    // Calculate specular component
+    vec3 dielectricColor = vec3(0.04);
+    vec3 F0 = mix(dielectricColor, baseColor, metalness);
+    vec3 specularFactor = vec3(0.0);
+    if (sDotN > 0.0) {
+        specularFactor = specularModel(F0, sDotH, sDotN, vDotN, n, h);
+        specularFactor *= normalDistribution(n, h, alpha);
+    }
+    vec3 specularColor = lights[lightIndex].color;
+    vec3 specular = specularColor * specularFactor;
+
+    // Blend between diffuse and specular to conserver energy
+    vec3 color = att * lights[lightIndex].intensity * (specular + diffuse * (vec3(1.0) - specular));
+
+    // Reduce by ambient occlusion amount
+    color *= ambientOcclusion;
+
+    return color;
+}
+
+vec3 toneMap(const in vec3 c)
+{
+    return c / (c + vec3(1.0));
+}
+
+vec3 gammaCorrect(const in vec3 color)
+{
+    return pow(color, vec3(1.0 / gamma));
+}
+
+vec4 metalRoughFunction(const in vec4 baseColor,
+                        const in float metalness,
+                        const in float roughness,
+                        const in float ambientOcclusion,
+                        const in vec3 worldPosition,
+                        const in vec3 worldView,
+                        const in vec3 worldNormal)
+{
+    vec3 cLinear = vec3(0.0);
+
+    // Remap roughness for a perceptually more linear correspondence
+    float alpha = remapRoughness(roughness);
+
+    for (int i = 0; i < lightCount; ++i) {
+        cLinear += pbrModel(i,
+                            worldPosition,
+                            worldNormal,
+                            worldView,
+                            baseColor.rgb,
+                            metalness,
+                            alpha,
+                            ambientOcclusion);
+    }
+
+    // Apply exposure correction
+    cLinear *= pow(2.0, exposure);
+
+    // Apply simple (Reinhard) tonemap transform to get into LDR range [0, 1]
+    vec3 cToneMapped = toneMap(cLinear);
+
+    // Apply gamma correction prior to display
+    vec3 cGamma = gammaCorrect(cToneMapped);
+
+    return vec4(cGamma, 1.0);
+}
+
+void main() 
+{
+    highp vec3 color = vertColor;
+    if (textureEnabled == 1) {
+        color = texture2D(textureId, vertTexCoord).rgb;
+    }
+
+    // FIXME: don't hard code here
+    exposure = 0.0;
+    gamma = 2.2;
+    const highp float vertAmbientOcclusion = 1.0;
+
+    // Light settings:
+    // https://doc-snapshots.qt.io/qt5-5.12/qt3d-pbr-materials-lights-qml.html
+    lightCount = 3;
+
+    lights[0].type = TYPE_POINT;
+    lights[0].position = vec3(0.0, 5.0, 0.0);
+    lights[0].color = vec3(1.0, 1.0, 1.0);
+    lights[0].intensity = 5.0;
+    lights[0].constantAttenuation = 1.0;
+    lights[0].linearAttenuation = 0.0;
+    lights[0].quadraticAttenuation = 0.0025;
+
+    lights[1].type = TYPE_POINT;
+    lights[1].position = vec3(5.0, 0.0, 0.0);
+    lights[1].color = vec3(1.0, 1.0, 1.0);
+    lights[1].intensity = 0.8;
+    lights[1].constantAttenuation = 1.0;
+    lights[1].linearAttenuation = 0.0;
+    lights[1].quadraticAttenuation = 0.0025;
+
+    lights[2].type = TYPE_POINT;
+    lights[2].position = vec3(0.0, -5.0, 0.0);
+    lights[2].color = vec3(1.0, 1.0, 1.0);
+    lights[2].intensity = 0.15;
+    lights[2].constantAttenuation = 1.0;
+    lights[2].linearAttenuation = 0.0;
+    lights[2].quadraticAttenuation = 0.0025;
+
+    gl_FragColor = metalRoughFunction(vec4(color, 1.0),
+                                      vertMetalness,
+                                      vertRoughness,
+                                      vertAmbientOcclusion,
+                                      vert,
+                                      vertView,
+                                      vertNormal);
+}

shaders/pbr.vert

@@ -0,0 +1,27 @@
+attribute vec4 vertex;
+attribute vec3 normal;
+attribute vec3 color;
+attribute vec2 texCoord;
+attribute float metalness;
+attribute float roughness;
+varying vec3 vert;
+varying vec3 vertNormal;
+varying vec3 vertColor;
+varying vec2 vertTexCoord;
+varying float vertMetalness;
+varying float vertRoughness;
+varying vec3 vertView;
+uniform mat4 projMatrix;
+uniform mat4 mvMatrix;
+uniform mat3 normalMatrix;
+void main() 
+{
+    vert = vertex.xyz;
+    vertNormal = normalize((projMatrix * mvMatrix * vec4(normal, 1.0)).xyz);
+    vertColor = color;
+    vertTexCoord = texCoord;
+    vertMetalness = metalness;
+    vertRoughness = roughness;
+    vertView = (projMatrix * mvMatrix * vec4(0, 0, 0, 1.0)).xyz;
+    gl_Position = projMatrix * mvMatrix * vertex;
+}

src/gltffile.cpp

@@ -157,8 +157,8 @@ GltfFileWriter::GltfFileWriter(MeshResultContext &resultContext,
             m_json["meshes"][0]["primitives"][primitiveIndex]["attributes"]["WEIGHTS_0"] = bufferViewIndex + (++attributeIndex);
         }
         m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["baseColorTexture"]["index"] = 0;
-        m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["metallicFactor"] = 0.0;
+        m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["metallicFactor"] = part.second.material.metalness;
-        m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["roughnessFactor"] = 1.0;
+        m_json["materials"][primitiveIndex]["pbrMetallicRoughness"]["roughnessFactor"] = part.second.material.roughness;
         
         primitiveIndex++;
 

src/main.cpp

@@ -4,6 +4,7 @@
 #include <QFontDatabase>
 #include <QDebug>
 #include <QtGlobal>
+#include <QSurfaceFormat>
 #include "skeletondocumentwindow.h"
 #include "theme.h"
 #include "version.h"
@@ -12,6 +13,10 @@ int main(int argc, char ** argv)
 {
     QApplication app(argc, argv);
     
+    QSurfaceFormat format = QSurfaceFormat::defaultFormat();
+    format.setProfile(QSurfaceFormat::OpenGLContextProfile::CompatibilityProfile);
+    QSurfaceFormat::setDefaultFormat(format);
+    
     // QuantumCD/Qt 5 Dark Fusion Palette
     // https://gist.github.com/QuantumCD/6245215
     qApp->setStyle(QStyleFactory::create("Fusion"));

src/meshgenerator.cpp

@@ -251,6 +251,16 @@ void *MeshGenerator::combinePartMesh(QString partId)
     if (MeshGenerator::m_enableDebug)
         meshlite_bmesh_enable_debug(m_meshliteContext, bmeshId, 1);
     
+    float metalness = 0.0;
+    QString metalnessString = valueOfKeyInMapOrEmpty(part, "metalness");
+    if (!metalnessString.isEmpty())
+        metalness = metalnessString.toFloat();
+    
+    float roughness = 1.0;
+    QString roughnessString = valueOfKeyInMapOrEmpty(part, "roughness");
+    if (!roughnessString.isEmpty())
+        roughness = roughnessString.toFloat();
+    
     QString mirroredPartId;
     QUuid mirroredPartIdNotAsString;
     if (xMirrored) {
@@ -291,7 +301,9 @@ void *MeshGenerator::combinePartMesh(QString partId)
         bmeshNode.origin = QVector3D(x, y, z);
         bmeshNode.radius = radius;
         bmeshNode.nodeId = QUuid(nodeId);
-        bmeshNode.color = partColor;
+        bmeshNode.material.color = partColor;
+        bmeshNode.material.metalness = metalness;
+        bmeshNode.material.roughness = roughness;
         bmeshNode.boneMark = boneMark;
         //if (SkeletonBoneMark::None != boneMark)
         //    bmeshNode.color = SkeletonBoneMarkToColor(boneMark);
@@ -362,7 +374,7 @@ void *MeshGenerator::combinePartMesh(QString partId)
     
     if (m_requirePreviewPartIds.find(partIdNotAsString) != m_requirePreviewPartIds.end()) {
         int trimedMeshId = meshlite_trim(m_meshliteContext, meshId, 1);
-        m_partPreviewMeshMap[partIdNotAsString] = new MeshLoader(m_meshliteContext, trimedMeshId, -1, partColor, nullptr, m_smoothNormal);
+        m_partPreviewMeshMap[partIdNotAsString] = new MeshLoader(m_meshliteContext, trimedMeshId, -1, {partColor, metalness, roughness}, nullptr, m_smoothNormal);
         m_generatedPreviewPartIds.insert(partIdNotAsString);
     }
     
@@ -697,7 +709,7 @@ void MeshGenerator::process()
     
     if (resultMeshId > 0) {
         loadGeneratedPositionsToMeshResultContext(m_meshliteContext, triangulatedFinalMeshId);
-        m_mesh = new MeshLoader(m_meshliteContext, resultMeshId, triangulatedFinalMeshId, Theme::white, &m_meshResultContext->triangleColors(), m_smoothNormal);
+        m_mesh = new MeshLoader(m_meshliteContext, resultMeshId, triangulatedFinalMeshId, {Theme::white, 0.0, 1.0}, &m_meshResultContext->triangleMaterials(), m_smoothNormal);
     }
     
     if (needDeleteCacheContext) {

src/meshloader.cpp

@@ -6,7 +6,7 @@
 
 #define MAX_VERTICES_PER_FACE   100
 
-MeshLoader::MeshLoader(void *meshlite, int meshId, int triangulatedMeshId, QColor modelColor, const std::vector<QColor> *triangleColors, bool smoothNormal) :
+MeshLoader::MeshLoader(void *meshlite, int meshId, int triangulatedMeshId, Material material, const std::vector<Material> *triangleMaterials, bool smoothNormal) :
     m_triangleVertices(nullptr),
     m_triangleVertexCount(0),
     m_edgeVertices(nullptr),
@@ -68,6 +68,8 @@ MeshLoader::MeshLoader(void *meshlite, int meshId, int triangulatedMeshId, QColo
             v->colorB = 0.0;
             v->texU = 0.0;
             v->texV = 0.0;
+            v->metalness = 0;
+            v->roughness = 1.0;
         }
     }
     
@@ -95,9 +97,9 @@ MeshLoader::MeshLoader(void *meshlite, int meshId, int triangulatedMeshId, QColo
     GLfloat *triangleNormals = new GLfloat[triangleCount * 3];
     int loadedTriangleNormalItemCount = meshlite_get_triangle_normal_array(meshlite, triangleMesh, triangleNormals, triangleCount * 3);
     
-    float modelR = modelColor.redF();
+    float modelR = material.color.redF();
-    float modelG = modelColor.greenF();
+    float modelG = material.color.greenF();
-    float modelB = modelColor.blueF();
+    float modelB = material.color.blueF();
     m_triangleVertexCount = triangleCount * 3;
     m_triangleVertices = new Vertex[m_triangleVertexCount * 3];
     for (int i = 0; i < triangleCount; i++) {
@@ -105,11 +107,15 @@ MeshLoader::MeshLoader(void *meshlite, int meshId, int triangulatedMeshId, QColo
         float useColorR = modelR;
         float useColorG = modelG;
         float useColorB = modelB;
-        if (triangleColors && i < (int)triangleColors->size()) {
+        float useMetalness = material.metalness;
-            QColor triangleColor = (*triangleColors)[i];
+        float useRoughness = material.roughness;
-            useColorR = triangleColor.redF();
+        if (triangleMaterials && i < (int)triangleMaterials->size()) {
-            useColorG = triangleColor.greenF();
+            auto triangleMaterial = (*triangleMaterials)[i];
-            useColorB = triangleColor.blueF();
+            useColorR = triangleMaterial.color.redF();
+            useColorG = triangleMaterial.color.greenF();
+            useColorB = triangleMaterial.color.blueF();
+            useMetalness = triangleMaterial.metalness;
+            useRoughness = triangleMaterial.roughness;
         }
         TriangulatedFace triangulatedFace;
         triangulatedFace.color.setRedF(useColorR);
@@ -136,6 +142,8 @@ MeshLoader::MeshLoader(void *meshlite, int meshId, int triangulatedMeshId, QColo
             v->colorR = useColorR;
             v->colorG = useColorG;
             v->colorB = useColorB;
+            v->metalness = useMetalness;
+            v->roughness = useRoughness;
         }
         m_triangulatedFaces.push_back(triangulatedFace);
     }
@@ -226,6 +234,7 @@ MeshLoader::MeshLoader(MeshResultContext &resultContext) :
                 const ResultVertex *srcVert = &part.second.vertices[vertexIndex];
                 const QVector3D *srcNormal = &part.second.interpolatedVertexNormals[vertexIndex];
                 const ResultVertexUv *srcUv = &part.second.vertexUvs[vertexIndex];
+                const Material *srcMaterial = &part.second.material;
                 Vertex *dest = &m_triangleVertices[destIndex];
                 dest->colorR = 0;
                 dest->colorG = 0;
@@ -238,6 +247,8 @@ MeshLoader::MeshLoader(MeshResultContext &resultContext) :
                 dest->normX = srcNormal->x();
                 dest->normY = srcNormal->y();
                 dest->normZ = srcNormal->z();
+                dest->metalness = srcMaterial->metalness;
+                dest->roughness = srcMaterial->roughness;
                 destIndex++;
             }
         }

src/meshloader.h

@@ -26,6 +26,8 @@ typedef struct
     GLfloat colorB;
     GLfloat texU;
     GLfloat texV;
+    GLfloat metalness;
+    GLfloat roughness;
 } Vertex;
 #pragma pack(pop)
 
@@ -38,7 +40,7 @@ struct TriangulatedFace
 class MeshLoader
 {
 public:
-    MeshLoader(void *meshlite, int meshId, int triangulatedMeshId=-1, QColor modelColor=Theme::white, const std::vector<QColor> *triangleColors=nullptr, bool smoothNormal=true);
+    MeshLoader(void *meshlite, int meshId, int triangulatedMeshId=-1, Material material={Theme::white, 0.0, 1.0}, const std::vector<Material> *triangleMaterials=nullptr, bool smoothNormal=true);
     MeshLoader(MeshResultContext &resultContext);
     MeshLoader(Vertex *triangleVertices, int vertexNum);
     MeshLoader(const MeshLoader &mesh);

src/meshresultcontext.cpp

@@ -26,7 +26,7 @@ struct CandidateEdge
 
 MeshResultContext::MeshResultContext() :
     m_triangleSourceResolved(false),
-    m_triangleColorResolved(false),
+    m_triangleMaterialResolved(false),
     m_triangleEdgeSourceMapResolved(false),
     m_bmeshNodeMapResolved(false),
     m_resultPartsResolved(false),
@@ -56,13 +56,13 @@ const std::map<int, std::pair<QUuid, QUuid>> &MeshResultContext::vertexSourceMap
     return m_vertexSourceMap;
 }
 
-const std::vector<QColor> &MeshResultContext::triangleColors()
+const std::vector<Material> &MeshResultContext::triangleMaterials()
 {
-    if (!m_triangleColorResolved) {
+    if (!m_triangleMaterialResolved) {
-        calculateTriangleColors(m_triangleColors);
+        calculateTriangleMaterials(m_triangleMaterials);
-        m_triangleColorResolved = true;
+        m_triangleMaterialResolved = true;
     }
-    return m_triangleColors;
+    return m_triangleMaterials;
 }
 
 const std::map<std::pair<int, int>, std::pair<QUuid, QUuid>> &MeshResultContext::triangleEdgeSourceMap()
@@ -257,15 +257,15 @@ void MeshResultContext::calculateRemainingVertexSourceNodesAfterTriangleSourceNo
     }
 }
 
-void MeshResultContext::calculateTriangleColors(std::vector<QColor> &triangleColors)
+void MeshResultContext::calculateTriangleMaterials(std::vector<Material> &triangleMaterials)
 {
-    std::map<std::pair<QUuid, QUuid>, QColor> nodeColorMap;
+    std::map<std::pair<QUuid, QUuid>, Material> nodeMaterialMap;
     for (const auto &it: bmeshNodes) {
-        nodeColorMap[std::make_pair(it.partId, it.nodeId)] = it.color;
+        nodeMaterialMap[std::make_pair(it.partId, it.nodeId)] = it.material;
     }
     const auto sourceNodes = triangleSourceNodes();
     for (const auto &it: sourceNodes) {
-        triangleColors.push_back(nodeColorMap[it]);
+        triangleMaterials.push_back(nodeMaterialMap[it]);
     }
 }
 
@@ -322,7 +322,7 @@ void MeshResultContext::calculateResultParts(std::map<QUuid, ResultPart> &parts)
         auto it = parts.find(sourceNode.first);
         if (it == parts.end()) {
             ResultPart newPart;
-            newPart.color = triangleColors()[x];
+            newPart.material = triangleMaterials()[x];
             parts.insert(std::make_pair(sourceNode.first, newPart));
         }
         auto &resultPart = parts[sourceNode.first];

src/meshresultcontext.h

@@ -10,13 +10,20 @@
 
 #define MAX_WEIGHT_NUM  4
 
+struct Material
+{
+    QColor color;
+    float metalness;
+    float roughness;
+};
+
 struct BmeshNode
 {
     QUuid partId;
     QUuid nodeId;
     QVector3D origin;
     float radius = 0;
-    QColor color;
+    Material material;
     SkeletonBoneMark boneMark;
 };
 
@@ -51,7 +58,7 @@ struct ResultVertexUv
 
 struct ResultPart
 {
-    QColor color;
+    Material material;
     std::vector<ResultVertex> vertices;
     std::vector<int> verticesOldIndicies;
     std::vector<QVector3D> interpolatedVertexNormals;
@@ -83,7 +90,7 @@ public:
     MeshResultContext();
 public:
     const std::vector<std::pair<QUuid, QUuid>> &triangleSourceNodes();
-    const std::vector<QColor> &triangleColors();
+    const std::vector<Material> &triangleMaterials();
     const std::map<std::pair<int, int>, std::pair<QUuid, QUuid>> &triangleEdgeSourceMap();
     const std::map<std::pair<QUuid, QUuid>, BmeshNode *> &bmeshNodeMap();
     const std::map<QUuid, ResultPart> &parts();
@@ -94,7 +101,7 @@ public:
     const std::vector<QVector3D> &interpolatedVertexNormals();
 private:
     bool m_triangleSourceResolved;
-    bool m_triangleColorResolved;
+    bool m_triangleMaterialResolved;
     bool m_triangleEdgeSourceMapResolved;
     bool m_bmeshNodeMapResolved;
     bool m_resultPartsResolved;
@@ -103,7 +110,7 @@ private:
     bool m_vertexNormalsInterpolated;
 private:
     std::vector<std::pair<QUuid, QUuid>> m_triangleSourceNodes;
-    std::vector<QColor> m_triangleColors;
+    std::vector<Material> m_triangleMaterials;
     std::map<std::pair<int, int>, std::pair<QUuid, QUuid>> m_triangleEdgeSourceMap;
     std::map<std::pair<QUuid, QUuid>, BmeshNode *> m_bmeshNodeMap;
     std::map<QUuid, ResultPart> m_resultParts;
@@ -117,7 +124,7 @@ private:
 private:
     void calculateTriangleSourceNodes(std::vector<std::pair<QUuid, QUuid>> &triangleSourceNodes, std::map<int, std::pair<QUuid, QUuid>> &vertexSourceMap);
     void calculateRemainingVertexSourceNodesAfterTriangleSourceNodesSolved(std::map<int, std::pair<QUuid, QUuid>> &vertexSourceMap);
-    void calculateTriangleColors(std::vector<QColor> &triangleColors);
+    void calculateTriangleMaterials(std::vector<Material> &triangleMaterials);
     void calculateTriangleEdgeSourceMap(std::map<std::pair<int, int>, std::pair<QUuid, QUuid>> &triangleEdgeSourceMap);
     void calculateBmeshNodeMap(std::map<std::pair<QUuid, QUuid>, BmeshNode *> &bmeshNodeMap);
     void calculateResultParts(std::map<QUuid, ResultPart> &parts);

src/modelmeshbinder.cpp

@@ -152,10 +152,14 @@ void ModelMeshBinder::paint(ModelShaderProgram *program)
                     f->glEnableVertexAttribArray(1);
                     f->glEnableVertexAttribArray(2);
                     f->glEnableVertexAttribArray(3);
-                    f->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), 0);
+                    f->glEnableVertexAttribArray(4);
-                    f->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), reinterpret_cast<void *>(3 * sizeof(GLfloat)));
+                    f->glEnableVertexAttribArray(5);
-                    f->glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), reinterpret_cast<void *>(6 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), 0);
-                    f->glVertexAttribPointer(3, 2, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), reinterpret_cast<void *>(9 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(3 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(6 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(3, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(9 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(4, 1, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(11 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(5, 1, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(12 * sizeof(GLfloat)));
                     m_vboTriangle.release();
                 }
                 {
@@ -171,10 +175,14 @@ void ModelMeshBinder::paint(ModelShaderProgram *program)
                     f->glEnableVertexAttribArray(1);
                     f->glEnableVertexAttribArray(2);
                     f->glEnableVertexAttribArray(3);
-                    f->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), 0);
+                    f->glEnableVertexAttribArray(4);
-                    f->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), reinterpret_cast<void *>(3 * sizeof(GLfloat)));
+                    f->glEnableVertexAttribArray(5);
-                    f->glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), reinterpret_cast<void *>(6 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), 0);
-                    f->glVertexAttribPointer(3, 2, GL_FLOAT, GL_FALSE, 11 * sizeof(GLfloat), reinterpret_cast<void *>(9 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(3 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(6 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(3, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(9 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(4, 1, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(11 * sizeof(GLfloat)));
+                    f->glVertexAttribPointer(5, 1, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void *>(12 * sizeof(GLfloat)));
                     m_vboEdge.release();
                 }
             } else {

src/modelshaderprogram.cpp

@@ -17,19 +17,26 @@ const QString &ModelShaderProgram::loadShaderSource(const QString &name)
     return insertResult.first->second;
 }
 
-ModelShaderProgram::ModelShaderProgram()
+ModelShaderProgram::ModelShaderProgram(bool usePBR)
 {
     if (QSurfaceFormat::defaultFormat().profile() == QSurfaceFormat::CoreProfile) {
         this->addShaderFromSourceCode(QOpenGLShader::Vertex, loadShaderSource(":/shaders/default.core.vert"));
         this->addShaderFromSourceCode(QOpenGLShader::Fragment, loadShaderSource(":/shaders/default.core.frag"));
+    } else {
+        if (usePBR) {
+            this->addShaderFromSourceCode(QOpenGLShader::Vertex, loadShaderSource(":/shaders/pbr.vert"));
+            this->addShaderFromSourceCode(QOpenGLShader::Fragment, loadShaderSource(":/shaders/pbr.frag"));
         } else {
             this->addShaderFromSourceCode(QOpenGLShader::Vertex, loadShaderSource(":/shaders/default.vert"));
             this->addShaderFromSourceCode(QOpenGLShader::Fragment, loadShaderSource(":/shaders/default.frag"));
         }
+    }
     this->bindAttributeLocation("vertex", 0);
     this->bindAttributeLocation("normal", 1);
     this->bindAttributeLocation("color", 2);
     this->bindAttributeLocation("texCoord", 3);
+    this->bindAttributeLocation("metalness", 4);
+    this->bindAttributeLocation("roughness", 5);
     this->link();
 
     this->bind();

src/modelshaderprogram.h

@@ -6,7 +6,7 @@
 class ModelShaderProgram : public QOpenGLShaderProgram
 {
 public:
-    ModelShaderProgram();
+    ModelShaderProgram(bool usePBR=false);
     int projMatrixLoc();
     int mvMatrixLoc();
     int normalMatrixLoc();

src/skeletondocument.cpp

@@ -874,6 +874,10 @@ void SkeletonDocument::toSnapshot(SkeletonSnapshot *snapshot, const std::set<QUu
                 part["deformWidth"] = QString::number(partIt.second.deformWidth);
             if (!partIt.second.name.isEmpty())
                 part["name"] = partIt.second.name;
+            if (partIt.second.metalnessAdjusted())
+                part["metalness"] = QString::number(partIt.second.metalness);
+            if (partIt.second.roughnessAdjusted())
+                part["roughness"] = QString::number(partIt.second.roughness);
             snapshot->parts[part["id"]] = part;
         }
         for (const auto &nodeIt: nodeMap) {
@@ -1071,6 +1075,12 @@ void SkeletonDocument::addFromSnapshot(const SkeletonSnapshot &snapshot, bool fr
         const auto &deformWidthIt = partKv.second.find("deformWidth");
         if (deformWidthIt != partKv.second.end())
             part.setDeformWidth(deformWidthIt->second.toFloat());
+        const auto &metalnessIt = partKv.second.find("metalness");
+        if (metalnessIt != partKv.second.end())
+            part.metalness = metalnessIt->second.toFloat();
+        const auto &roughnessIt = partKv.second.find("roughness");
+        if (roughnessIt != partKv.second.end())
+            part.roughness = roughnessIt->second.toFloat();
         newAddedPartIds.insert(part.id);
     }
     for (const auto &nodeKv: snapshot.nodes) {
@@ -2145,6 +2155,32 @@ void SkeletonDocument::setPartDeformWidth(QUuid partId, float width)
     emit skeletonChanged();
 }
 
+void SkeletonDocument::setPartMetalness(QUuid partId, float metalness)
+{
+    auto part = partMap.find(partId);
+    if (part == partMap.end()) {
+        qDebug() << "Part not found:" << partId;
+        return;
+    }
+    part->second.metalness = metalness;
+    part->second.dirty = true;
+    emit partMetalnessChanged(partId);
+    emit skeletonChanged();
+}
+
+void SkeletonDocument::setPartRoughness(QUuid partId, float roughness)
+{
+    auto part = partMap.find(partId);
+    if (part == partMap.end()) {
+        qDebug() << "Part not found:" << partId;
+        return;
+    }
+    part->second.roughness = roughness;
+    part->second.dirty = true;
+    emit partRoughnessChanged(partId);
+    emit skeletonChanged();
+}
+
 void SkeletonDocument::setPartRoundState(QUuid partId, bool rounded)
 {
     auto part = partMap.find(partId);

src/skeletondocument.h

@@ -97,6 +97,8 @@ public:
     std::vector<QUuid> nodeIds;
     bool dirty;
     bool wrapped;
+    float metalness;
+    float roughness;
     SkeletonPart(const QUuid &withId=QUuid()) :
         visible(true),
         locked(false),
@@ -110,7 +112,9 @@ public:
         color(Theme::white),
         hasColor(false),
         dirty(true),
-        wrapped(false)
+        wrapped(false),
+        metalness(0.0),
+        roughness(1.0)
     {
         id = withId.isNull() ? QUuid::createUuid() : withId;
     }
@@ -142,6 +146,18 @@ public:
     {
         return deformThicknessAdjusted() || deformWidthAdjusted();
     }
+    bool metalnessAdjusted() const
+    {
+        return fabs(metalness - 0.0) >= 0.01;
+    }
+    bool roughnessAdjusted() const
+    {
+        return fabs(roughness - 1.0) >= 0.01;
+    }
+    bool materialAdjusted() const
+    {
+        return metalnessAdjusted() || roughnessAdjusted();
+    }
     bool isEditVisible() const
     {
         return visible && !disabled;
@@ -162,6 +178,8 @@ public:
         wrapped = other.wrapped;
         componentId = other.componentId;
         dirty = other.dirty;
+        metalness = other.metalness;
+        roughness = other.roughness;
     }
     void updatePreviewMesh(MeshLoader *previewMesh)
     {
@@ -444,6 +462,8 @@ signals:
     void partRoundStateChanged(QUuid partId);
     void partColorStateChanged(QUuid partId);
     void partWrapStateChanged(QUuid partId);
+    void partMetalnessChanged(QUuid partId);
+    void partRoughnessChanged(QUuid partId);
     void componentInverseStateChanged(QUuid partId);
     void cleanup();
     void originChanged();
@@ -583,6 +603,8 @@ public slots:
     void setPartRoundState(QUuid partId, bool rounded);
     void setPartColorState(QUuid partId, bool hasColor, QColor color);
     void setPartWrapState(QUuid partId, bool wrapped);
+    void setPartMetalness(QUuid partId, float metalness);
+    void setPartRoughness(QUuid partId, float roughness);
     void setComponentInverseState(QUuid componentId, bool inverse);
     void moveComponentUp(QUuid componentId);
     void moveComponentDown(QUuid componentId);

src/skeletondocumentwindow.cpp

@@ -760,6 +760,8 @@ SkeletonDocumentWindow::SkeletonDocumentWindow() :
     connect(m_document, &SkeletonDocument::partRoundStateChanged, partTreeWidget, &SkeletonPartTreeWidget::partRoundStateChanged);
     connect(m_document, &SkeletonDocument::partWrapStateChanged, partTreeWidget, &SkeletonPartTreeWidget::partWrapStateChanged);
     connect(m_document, &SkeletonDocument::partColorStateChanged, partTreeWidget, &SkeletonPartTreeWidget::partColorStateChanged);
+    connect(m_document, &SkeletonDocument::partMetalnessChanged, partTreeWidget, &SkeletonPartTreeWidget::partMetalnessChanged);
+    connect(m_document, &SkeletonDocument::partRoughnessChanged, partTreeWidget, &SkeletonPartTreeWidget::partRoughnessChanged);
     connect(m_document, &SkeletonDocument::partRemoved, partTreeWidget, &SkeletonPartTreeWidget::partRemoved);
     connect(m_document, &SkeletonDocument::cleanup, partTreeWidget, &SkeletonPartTreeWidget::removeAllContent);
     connect(m_document, &SkeletonDocument::partChecked, partTreeWidget, &SkeletonPartTreeWidget::partChecked);

src/skeletonparttreewidget.cpp

@@ -932,6 +932,28 @@ void SkeletonPartTreeWidget::partColorStateChanged(QUuid partId)
     widget->updateColorButton();
 }
 
+void SkeletonPartTreeWidget::partMetalnessChanged(QUuid partId)
+{
+    auto item = m_partItemMap.find(partId);
+    if (item == m_partItemMap.end()) {
+        qDebug() << "Part item not found:" << partId;
+        return;
+    }
+    SkeletonPartWidget *widget = (SkeletonPartWidget *)itemWidget(item->second, 0);
+    widget->updateColorButton();
+}
+
+void SkeletonPartTreeWidget::partRoughnessChanged(QUuid partId)
+{
+    auto item = m_partItemMap.find(partId);
+    if (item == m_partItemMap.end()) {
+        qDebug() << "Part item not found:" << partId;
+        return;
+    }
+    SkeletonPartWidget *widget = (SkeletonPartWidget *)itemWidget(item->second, 0);
+    widget->updateColorButton();
+}
+
 void SkeletonPartTreeWidget::partChecked(QUuid partId)
 {
     auto item = m_partItemMap.find(partId);

src/skeletonparttreewidget.h

@@ -62,6 +62,8 @@ public slots:
     void partRoundStateChanged(QUuid partId);
     void partWrapStateChanged(QUuid partId);
     void partColorStateChanged(QUuid partId);
+    void partMetalnessChanged(QUuid partId);
+    void partRoughnessChanged(QUuid partId);
     void partChecked(QUuid partId);
     void partUnchecked(QUuid partId);
     void groupChanged(QTreeWidgetItem *item, int column);

src/skeletonpartwidget.cpp

@@ -131,6 +131,8 @@ SkeletonPartWidget::SkeletonPartWidget(const SkeletonDocument *document, QUuid p
     connect(this, &SkeletonPartWidget::setPartRoundState, m_document, &SkeletonDocument::setPartRoundState);
     connect(this, &SkeletonPartWidget::setPartWrapState, m_document, &SkeletonDocument::setPartWrapState);
     connect(this, &SkeletonPartWidget::setPartColorState, m_document, &SkeletonDocument::setPartColorState);
+    connect(this, &SkeletonPartWidget::setPartMetalness, m_document, &SkeletonDocument::setPartMetalness);
+    connect(this, &SkeletonPartWidget::setPartRoughness, m_document, &SkeletonDocument::setPartRoughness);
     connect(this, &SkeletonPartWidget::checkPart, m_document, &SkeletonDocument::checkPart);
     connect(this, &SkeletonPartWidget::enableBackgroundBlur, m_document, &SkeletonDocument::enableBackgroundBlur);
     connect(this, &SkeletonPartWidget::disableBackgroundBlur, m_document, &SkeletonDocument::disableBackgroundBlur);
@@ -301,9 +303,10 @@ void SkeletonPartWidget::showColorSettingPopup(const QPoint &pos)
     palette.setColor(QPalette::Button, choosenColor);
     pickButton->setPalette(palette);
     
-    QHBoxLayout *layout = new QHBoxLayout;
+    QHBoxLayout *colorLayout = new QHBoxLayout;
-    layout->addWidget(colorEraser);
+    colorLayout->addWidget(colorEraser);
-    layout->addWidget(pickButton);
+    colorLayout->addWidget(pickButton);
+    colorLayout->addStretch();
     
     connect(colorEraser, &QPushButton::clicked, [=]() {
         emit setPartColorState(m_partId, false, Theme::white);
@@ -320,7 +323,55 @@ void SkeletonPartWidget::showColorSettingPopup(const QPoint &pos)
         }
     });
     
-    popup->setLayout(layout);
+    FloatNumberWidget *metalnessWidget = new FloatNumberWidget;
+    metalnessWidget->setItemName(tr("Metalness"));
+    metalnessWidget->setRange(0, 1);
+    metalnessWidget->setValue(part->metalness);
+    
+    connect(metalnessWidget, &FloatNumberWidget::valueChanged, [=](float value) {
+        emit setPartMetalness(m_partId, value);
+        emit groupOperationAdded();
+    });
+    
+    FloatNumberWidget *roughnessWidget = new FloatNumberWidget;
+    roughnessWidget->setItemName(tr("Roughness"));
+    roughnessWidget->setRange(0, 1);
+    roughnessWidget->setValue(part->roughness);
+    
+    connect(roughnessWidget, &FloatNumberWidget::valueChanged, [=](float value) {
+        emit setPartRoughness(m_partId, value);
+        emit groupOperationAdded();
+    });
+    
+    QPushButton *metalnessEraser = new QPushButton(QChar(fa::eraser));
+    initToolButton(metalnessEraser);
+    
+    connect(metalnessEraser, &QPushButton::clicked, [=]() {
+        metalnessWidget->setValue(0.0);
+        emit groupOperationAdded();
+    });
+    
+    QPushButton *roughnessEraser = new QPushButton(QChar(fa::eraser));
+    initToolButton(roughnessEraser);
+    
+    connect(roughnessEraser, &QPushButton::clicked, [=]() {
+        roughnessWidget->setValue(1.0);
+        emit groupOperationAdded();
+    });
+    
+    QHBoxLayout *metalnessLayout = new QHBoxLayout;
+    QHBoxLayout *roughnessLayout = new QHBoxLayout;
+    metalnessLayout->addWidget(metalnessEraser);
+    metalnessLayout->addWidget(metalnessWidget);
+    roughnessLayout->addWidget(roughnessEraser);
+    roughnessLayout->addWidget(roughnessWidget);
+    
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addLayout(colorLayout);
+    mainLayout->addLayout(metalnessLayout);
+    mainLayout->addLayout(roughnessLayout);
+    
+    popup->setLayout(mainLayout);
     
     QWidgetAction *action = new QWidgetAction(this);
     action->setDefaultWidget(popup);
@@ -518,7 +569,7 @@ void SkeletonPartWidget::updateColorButton()
         qDebug() << "Part not found:" << m_partId;
         return;
     }
-    if (part->hasColor)
+    if (part->hasColor || part->materialAdjusted())
         updateButton(m_colorButton, QChar(fa::eyedropper), true);
     else
         updateButton(m_colorButton, QChar(fa::eyedropper), false);

src/skeletonpartwidget.h

@@ -21,6 +21,8 @@ signals:
     void setPartRoundState(QUuid partId, bool rounded);
     void setPartColorState(QUuid partId, bool hasColor, QColor color);
     void setPartWrapState(QUuid partId, bool wrapped);
+    void setPartMetalness(QUuid partId, float metalness);
+    void setPartRoughness(QUuid partId, float roughness);
     void movePartUp(QUuid partId);
     void movePartDown(QUuid partId);
     void movePartToTop(QUuid partId);

src/skinnedmeshcreator.cpp

@@ -45,11 +45,11 @@ MeshLoader *SkinnedMeshCreator::createMeshFromTransform(const std::vector<QMatri
     int triangleVerticesNum = 0;
     for (size_t triangleIndex = 0; triangleIndex < m_meshResultContext.triangles.size(); triangleIndex++) {
         const auto &sourceTriangle = m_meshResultContext.triangles[triangleIndex];
-        QColor triangleColor = m_meshResultContext.triangleColors()[triangleIndex];
+        Material triangleMaterial = m_meshResultContext.triangleMaterials()[triangleIndex];
         for (int i = 0; i < 3; i++) {
             Vertex &currentVertex = triangleVertices[triangleVerticesNum++];
             const auto &sourcePosition = transformedPositions[sourceTriangle.indicies[i]];
-            const auto &sourceColor = triangleColor;
+            const auto &sourceColor = triangleMaterial.color;
             const auto &sourceNormal = transformedPoseNormals[sourceTriangle.indicies[i]];
             currentVertex.posX = sourcePosition.x();
             currentVertex.posY = sourcePosition.y();
@@ -62,6 +62,8 @@ MeshLoader *SkinnedMeshCreator::createMeshFromTransform(const std::vector<QMatri
             currentVertex.normX = sourceNormal.x();
             currentVertex.normY = sourceNormal.y();
             currentVertex.normZ = sourceNormal.z();
+            currentVertex.metalness = triangleMaterial.metalness;
+            currentVertex.roughness = triangleMaterial.roughness;
         }
     }
     

src/texturegenerator.cpp

@@ -72,7 +72,7 @@ MeshLoader *TextureGenerator::takeResultMesh()
 
 void TextureGenerator::process()
 {
-    const std::vector<QColor> &triangleColors = m_resultContext->triangleColors();
+    const std::vector<Material> &triangleMaterials = m_resultContext->triangleMaterials();
     const std::vector<ResultTriangleUv> &triangleUvs = m_resultContext->triangleUvs();
     
     m_resultTextureColorImage = new QImage(TextureGenerator::m_textureWidth, TextureGenerator::m_textureHeight, QImage::Format_ARGB32);
@@ -105,10 +105,10 @@ void TextureGenerator::process()
                 path.lineTo(uv->uv[j][0] * TextureGenerator::m_textureWidth, uv->uv[j][1] * TextureGenerator::m_textureHeight);
             }
         }
-        QPen textureBorderPen(triangleColors[i]);
+        QPen textureBorderPen(triangleMaterials[i].color);
         textureBorderPen.setWidth(32);
         texturePainter.setPen(textureBorderPen);
-        texturePainter.setBrush(QBrush(triangleColors[i]));
+        texturePainter.setBrush(QBrush(triangleMaterials[i].color));
         texturePainter.drawPath(path);
     }
     // round 2, real paint
@@ -123,7 +123,7 @@ void TextureGenerator::process()
                 path.lineTo(uv->uv[j][0] * TextureGenerator::m_textureWidth, uv->uv[j][1] * TextureGenerator::m_textureHeight);
             }
         }
-        texturePainter.fillPath(path, QBrush(triangleColors[i]));
+        texturePainter.fillPath(path, QBrush(triangleMaterials[i].color));
     }
     
     pen.setWidth(0);