Fix shader camera pos [skip ci]

shaders/default.core.frag

@@ -70,7 +70,6 @@ in vec3 secondLightPos;
 in vec3 thirdLightPos;
 in float vertAlpha;
 out vec4 fragColor;
-uniform vec3 lightPos;
 uniform sampler2D textureId;
 uniform int textureEnabled;
 uniform sampler2D normalMapId;

shaders/default.core.vert

@@ -24,6 +24,7 @@ uniform mat4 modelMatrix;
 uniform mat3 normalMatrix;
 uniform mat4 viewMatrix;
 uniform int normalMapEnabled;
+uniform vec3 eyePos;
 
 mat3 transpose(mat3 m) 
 {
@@ -39,7 +40,7 @@ void main()
     vertNormal = normalize((modelMatrix * vec4(normal, 1.0)).xyz);
     vertColor = color;
     vertAlpha = alpha;
-    cameraPos = vec3(0, 0, -4.0);
+    cameraPos = eyePos;
 
     firstLightPos = vec3(5.0, 5.0, 5.0);
     secondLightPos = vec3(-5.0, 5.0, 5.0);

shaders/default.frag

@@ -69,7 +69,6 @@ varying vec3 firstLightPos;
 varying vec3 secondLightPos;
 varying vec3 thirdLightPos;
 varying float vertAlpha;
-uniform vec3 lightPos;
 uniform sampler2D textureId;
 uniform int textureEnabled;
 uniform sampler2D normalMapId;

shaders/default.vert

@@ -24,6 +24,7 @@ uniform mat4 modelMatrix;
 uniform mat3 normalMatrix;
 uniform mat4 viewMatrix;
 uniform int normalMapEnabled;
+uniform vec3 eyePos;
 
 mat3 transpose(mat3 m) 
 {
@@ -39,7 +40,7 @@ void main()
     vertNormal = normalize((modelMatrix * vec4(normal, 1.0)).xyz);
     vertColor = color;
     vertAlpha = alpha;
-    cameraPos = vec3(0, 0, -4.0);
+    cameraPos = eyePos;
 
     firstLightPos = vec3(5.0, 5.0, 5.0);
     secondLightPos = vec3(-5.0, 5.0, 5.0);

src/documentwindow.cpp

@@ -2159,6 +2159,7 @@ void DocumentWindow::exportImageToFilename(const QString &filename)
         offlineRender->setXRotation(m_modelRenderWidget->xRot());
         offlineRender->setYRotation(m_modelRenderWidget->yRot());
         offlineRender->setZRotation(m_modelRenderWidget->zRot());
+        offlineRender->setEyePosition(m_modelRenderWidget->eyePosition());
         offlineRender->setRenderPurpose(0);
         QImage *normalMap = new QImage();
         QImage *depthMap = new QImage();

src/modeloffscreenrender.cpp

@@ -53,6 +53,11 @@ void ModelOffscreenRender::setZRotation(int angle)
     m_zRot = angle;
 }
 
+void ModelOffscreenRender::setEyePosition(const QVector3D &eyePosition)
+{
+	m_eyePosition = eyePosition;
+}
+
 void ModelOffscreenRender::setRenderPurpose(int purpose)
 {
     m_renderPurpose = purpose;
@@ -144,10 +149,10 @@ QImage ModelOffscreenRender::toImage(const QSize &size)
         projection.perspective(45.0f, GLfloat(size.width()) / size.height(), 0.01f, 100.0f);
         
         camera.setToIdentity();
-        camera.translate(QVector3D(0, 0, -4.0));
+        camera.translate(m_eyePosition);
         
         program->bind();
-        program->setUniformValue(program->lightPosLoc(), QVector3D(0, 0, 70));
+        program->setUniformValue(program->eyePosLoc(), m_eyePosition);
         program->setUniformValue(program->toonShadingEnabledLoc(), m_toonShading ? 1 : 0);
         program->setUniformValue(program->projectionMatrixLoc(), projection);
         program->setUniformValue(program->modelMatrixLoc(), world);

src/modeloffscreenrender.h

@@ -19,6 +19,7 @@ public:
     void setXRotation(int angle);
     void setYRotation(int angle);
     void setZRotation(int angle);
+    void setEyePosition(const QVector3D &eyePosition);
     void setRenderPurpose(int purpose);
     void setRenderThread(QThread *thread);
     void updateMesh(Model *mesh);
@@ -29,6 +30,7 @@ private:
     int m_xRot = 0;
     int m_yRot = 0;
     int m_zRot = 0;
+    QVector3D m_eyePosition;
     int m_renderPurpose = 0;
     QOpenGLContext *m_context = nullptr;
     QOpenGLFramebufferObject *m_renderFbo = nullptr;

src/modelshaderprogram.cpp

@@ -46,7 +46,7 @@ ModelShaderProgram::ModelShaderProgram(bool isCoreProfile)
     m_modelMatrixLoc = this->uniformLocation("modelMatrix");
     m_normalMatrixLoc = this->uniformLocation("normalMatrix");
     m_viewMatrixLoc = this->uniformLocation("viewMatrix");
-    m_lightPosLoc = this->uniformLocation("lightPos");
+    m_eyePosLoc = this->uniformLocation("eyePos");
     m_textureIdLoc = this->uniformLocation("textureId");
     m_textureEnabledLoc = this->uniformLocation("textureEnabled");
     m_normalMapIdLoc = this->uniformLocation("normalMapId");
@@ -93,9 +93,9 @@ int ModelShaderProgram::viewMatrixLoc()
     return m_viewMatrixLoc;
 }
 
-int ModelShaderProgram::lightPosLoc()
+int ModelShaderProgram::eyePosLoc()
 {
-    return m_lightPosLoc;
+    return m_eyePosLoc;
 }
 
 int ModelShaderProgram::textureEnabledLoc()

src/modelshaderprogram.h

@@ -11,7 +11,7 @@ public:
     int modelMatrixLoc();
     int normalMatrixLoc();
     int viewMatrixLoc();
-    int lightPosLoc();
+    int eyePosLoc();
     int textureIdLoc();
     int textureEnabledLoc();
     int normalMapEnabledLoc();
@@ -42,7 +42,7 @@ private:
     int m_modelMatrixLoc = 0;
     int m_normalMatrixLoc = 0;
     int m_viewMatrixLoc = 0;
-    int m_lightPosLoc = 0;
+    int m_eyePosLoc = 0;
     int m_textureIdLoc = 0;
     int m_textureEnabledLoc = 0;
     int m_normalMapEnabledLoc = 0;

src/modelwidget.cpp

@@ -12,13 +12,13 @@
 // Modifed from http://doc.qt.io/qt-5/qtopengl-hellogl2-glwidget-cpp.html
 
 bool ModelWidget::m_transparent = true;
-const QVector3D ModelWidget::m_cameraPosition = QVector3D(0, 0, -4.0);
 float ModelWidget::m_minZoomRatio = 5.0;
 float ModelWidget::m_maxZoomRatio = 80.0;
 
 int ModelWidget::m_defaultXRotation = 30 * 16;
 int ModelWidget::m_defaultYRotation = -45 * 16;
 int ModelWidget::m_defaultZRotation = 0;
+QVector3D ModelWidget::m_defaultEyePosition = QVector3D(0, 0, -4.0);
 
 ModelWidget::ModelWidget(QWidget *parent) :
     QOpenGLWidget(parent),
@@ -56,6 +56,11 @@ ModelWidget::ModelWidget(QWidget *parent) :
     connect(&Preferences::instance(), &Preferences::toonLineChanged, this, &ModelWidget::reRender);
 }
 
+const QVector3D &ModelWidget::eyePosition()
+{
+	return m_eyePosition;
+}
+
 void ModelWidget::reRender()
 {
     emit renderParametersChanged();
@@ -166,15 +171,6 @@ void ModelWidget::initializeGL()
     // sure there is a VAO when one is needed.
     m_meshBinder.initialize();
 
-    // Our camera never changes in this example.
-    m_camera.setToIdentity();
-    // FIXME: if change here, please also change the camera pos in PBR shader
-    m_camera.translate(m_cameraPosition.x(), m_cameraPosition.y(), m_cameraPosition.z());
-
-    // Light position is fixed.
-    // FIXME: PBR render no longer use this parameter
-    m_program->setUniformValue(m_program->lightPosLoc(), QVector3D(0, 0, 70));
-
     m_program->release();
 }
 
@@ -194,8 +190,12 @@ void ModelWidget::paintGL()
     m_world.rotate(m_xRot / 16.0f, 1, 0, 0);
     m_world.rotate(m_yRot / 16.0f, 0, 1, 0);
     m_world.rotate(m_zRot / 16.0f, 0, 0, 1);
+    
+    m_camera.setToIdentity();
+    m_camera.translate(m_eyePosition.x(), m_eyePosition.y(), m_eyePosition.z());
 
     m_program->bind();
+    m_program->setUniformValue(m_program->eyePosLoc(), m_eyePosition);
     m_program->setUniformValue(m_program->toonShadingEnabledLoc(), Preferences::instance().toonShading() ? 1 : 0);
     m_program->setUniformValue(m_program->projectionMatrixLoc(), m_projection);
     m_program->setUniformValue(m_program->modelMatrixLoc(), m_world);
@@ -409,6 +409,7 @@ void ModelWidget::zoom(float delta)
     }
     setGeometry(geometry().marginsAdded(margins));
     emit renderParametersChanged();
+	update();
 }
 
 void ModelWidget::setMousePickTargetPositionInModelSpace(QVector3D position)

src/modelwidget.h

@@ -79,6 +79,7 @@ public:
     int xRot();
     int yRot();
     int zRot();
+    const QVector3D &eyePosition();
 private:
     int m_xRot;
     int m_yRot;
@@ -96,8 +97,8 @@ private:
     QMatrix4x4 m_camera;
     QMatrix4x4 m_world;
     float m_mousePickRadius = 0.0;
+    QVector3D m_eyePosition = m_defaultEyePosition;
     static bool m_transparent;
-    static const QVector3D m_cameraPosition;
     static float m_minZoomRatio;
     static float m_maxZoomRatio;
     QPoint m_moveStartPos;
@@ -111,6 +112,7 @@ public:
     static int m_defaultXRotation;
     static int m_defaultYRotation;
     static int m_defaultZRotation;
+    static QVector3D m_defaultEyePosition;
 };
 
 #endif

src/normalanddepthmapsgenerator.cpp

@@ -33,6 +33,7 @@ ModelOffscreenRender *NormalAndDepthMapsGenerator::createOfflineRender(ModelWidg
     offlineRender->setXRotation(modelWidget->xRot());
     offlineRender->setYRotation(modelWidget->yRot());
     offlineRender->setZRotation(modelWidget->zRot());
+    offlineRender->setEyePosition(modelWidget->eyePosition());
     offlineRender->setRenderPurpose(purpose);
     return offlineRender;
 }

src/normalanddepthmapsgenerator.h

@@ -2,6 +2,7 @@
 #define DUST3D_NORMAL_AND_DEPTH_MAPS_GENERATOR_H
 #include <QObject>
 #include <QImage>
+#include <QVector3D>
 #include "modelwidget.h"
 #include "modeloffscreenrender.h"
 #include "model.h"