Minimal working shader

application/shaders/model_core.frag

@@ -0,0 +1,7 @@
+#version 330
+uniform vec4 defaultColor;
+out vec4 fragColor;
+void main()
+{
+    fragColor = defaultColor;
+}

application/shaders/model_core.vert

@@ -0,0 +1,16 @@
+#version 330
+layout(location = 0) in vec4 vertex;
+layout(location = 1) in vec3 normal;
+layout(location = 2) in vec3 color;
+layout(location = 3) in vec2 texCoord;
+layout(location = 4) in float metalness;
+layout(location = 5) in float roughness;
+layout(location = 6) in vec3 tangent;
+layout(location = 7) in float alpha;
+uniform mat4 modelMatrix;
+uniform mat4 viewMatrix;
+uniform mat4 projectionMatrix;
+void main()
+{
+    gl_Position = projectionMatrix * viewMatrix * modelMatrix * vertex;
+}

application/sources/about_widget.cc

@@ -4,11 +4,12 @@
 
 #include "about_widget.h"
 #include "version.h"
+#include "model_widget.h"
 
 AboutWidget::AboutWidget()
 {
     QTextEdit *versionInfoLabel = new QTextEdit;
-    versionInfoLabel->setText(QString("%1 %2 (version: %3 build: %4 %5)\nopengl: %6 shader: %7 core: %8").arg(APP_NAME).arg(APP_HUMAN_VER).arg(APP_VER).arg(__DATE__).arg(__TIME__).arg((char *)glGetString(GL_VERSION)).arg((char *)glGetString(GL_SHADING_LANGUAGE_VERSION)).arg(QSurfaceFormat::defaultFormat().profile() == QSurfaceFormat::CoreProfile ? "true" : "false"));
+    versionInfoLabel->setText(QString("%1 %2 (version: %3 build: %4 %5)\nopengl: %6 shader: %7 core: %8").arg(APP_NAME).arg(APP_HUMAN_VER).arg(APP_VER).arg(__DATE__).arg(__TIME__).arg(ModelWidget::m_openGLVersion).arg(ModelWidget::m_openGLShadingLanguageVersion).arg(ModelWidget::m_openGLIsCoreProfile ? "true" : "false"));
     versionInfoLabel->setReadOnly(true);
     
     QVBoxLayout *mainLayout = new QVBoxLayout;

application/sources/main.cc

@@ -22,8 +22,8 @@ int main(int argc, char *argv[])
     QCoreApplication::setOrganizationName(APP_COMPANY);
     QCoreApplication::setOrganizationDomain(APP_HOMEPAGE_URL);
     
-    freopen("dust3d.log", "w", stdout);
-    setvbuf(stdout, 0, _IONBF, 0);
+    //freopen("dust3d.log", "w", stdout);
+    //setvbuf(stdout, 0, _IONBF, 0);
     
     DocumentWindow *firstWindow = DocumentWindow::createDocumentWindow();
     

application/sources/model_offscreen_render.cc

@@ -48,4 +48,5 @@ void ModelOffscreenRender::updateMesh(Model *mesh)
 QImage ModelOffscreenRender::toImage(const QSize &size)
 {
     // TODO
+    return QImage();
 }

application/sources/model_opengl_object.cc

@@ -1,3 +1,4 @@
+#include <dust3d/base/debug.h>
 #include <QOpenGLFunctions>
 #include <QOpenGLContext>
 #include "model_opengl_object.h"
@@ -15,6 +16,7 @@ void ModelOpenGLObject::draw()
     if (0 == m_meshTriangleVertexCount)
         return;
     QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
+    QOpenGLVertexArrayObject::Binder binder(&m_vertexArrayObject);
     f->glDrawArrays(GL_TRIANGLES, 0, m_meshTriangleVertexCount);
 }
 

application/sources/model_opengl_program.cc

@@ -1,5 +1,6 @@
 #include <QOpenGLFunctions>
 #include <QFile>
+#include <dust3d/base/debug.h>
 #include "model_opengl_program.h"
 
 static const QString &loadShaderSource(const QString &name)
@@ -16,6 +17,12 @@ static const QString &loadShaderSource(const QString &name)
     return insertResult.first->second;
 }
 
+void ModelOpenGLProgram::addShaderFromResource(QOpenGLShader::ShaderType type, const char *resourceName)
+{
+    if (!addShaderFromSourceCode(type, loadShaderSource(resourceName)))
+        dust3dDebug << "Failed to addShaderFromResource, resource:" << resourceName << ", " << log().toStdString();
+}
+
 void ModelOpenGLProgram::load(bool isCoreProfile)
 {
     if (m_isLoaded)
@@ -23,11 +30,11 @@ void ModelOpenGLProgram::load(bool isCoreProfile)
 
     m_isCoreProfile = isCoreProfile;
     if (m_isCoreProfile) {
-        addShaderFromSourceCode(QOpenGLShader::Vertex, loadShaderSource(":/shaders/model_core.vert"));
-        addShaderFromSourceCode(QOpenGLShader::Fragment, loadShaderSource(":/shaders/model_core.frag"));
+        addShaderFromResource(QOpenGLShader::Vertex, ":/shaders/model_core.vert");
+        addShaderFromResource(QOpenGLShader::Fragment, ":/shaders/model_core.frag");
     } else {
-        addShaderFromSourceCode(QOpenGLShader::Vertex, loadShaderSource(":/shaders/model.vert"));
-        addShaderFromSourceCode(QOpenGLShader::Fragment, loadShaderSource(":/shaders/model.frag"));
+        addShaderFromResource(QOpenGLShader::Vertex, ":/shaders/model.vert");
+        addShaderFromResource(QOpenGLShader::Fragment, ":/shaders/model.frag");
     }
     bindAttributeLocation("vertex", 0);
     bindAttributeLocation("normal", 1);
@@ -39,6 +46,15 @@ void ModelOpenGLProgram::load(bool isCoreProfile)
     bindAttributeLocation("alpha", 7);
     link();
     bind();
-        
     m_isLoaded = true;
 }
+
+int ModelOpenGLProgram::getUniformLocationByName(const char *name)
+{
+    auto findLocation = m_uniformLocationMap.find(name);
+    if (findLocation != m_uniformLocationMap.end())
+        return findLocation->second;
+    int location = uniformLocation(name);
+    m_uniformLocationMap.insert({std::string(name), location});
+    return location;
+}

application/sources/model_opengl_program.h

@@ -2,15 +2,20 @@
 #define DUST3D_APPLICATION_MODEL_OPENGL_PROGRAM_H_
 
 #include <QOpenGLShaderProgram>
+#include <QOpenGLShader>
 
 class ModelOpenGLProgram: public QOpenGLShaderProgram
 {
 public:
     void load(bool isCoreProfile=false);
+    int getUniformLocationByName(const char *name);
 
 private:
+    void addShaderFromResource(QOpenGLShader::ShaderType type, const char *resourceName);
+
     bool m_isLoaded = false;
     bool m_isCoreProfile = false;
+    std::map<std::string, int> m_uniformLocationMap;
 };
 
 #endif

application/sources/model_widget.cc

@@ -13,6 +13,9 @@ int ModelWidget::m_defaultXRotation = 30 * 16;
 int ModelWidget::m_defaultYRotation = -45 * 16;
 int ModelWidget::m_defaultZRotation = 0;
 QVector3D ModelWidget::m_defaultEyePosition = QVector3D(0, 0, -2.5);
+QString ModelWidget::m_openGLVersion = "";
+QString ModelWidget::m_openGLShadingLanguageVersion = "";
+bool ModelWidget::m_openGLIsCoreProfile = false;
 
 ModelWidget::ModelWidget(QWidget *parent) :
     QOpenGLWidget(parent)
@@ -111,19 +114,14 @@ void ModelWidget::setZRotation(int angle)
 
 void ModelWidget::cleanup()
 {
-    if (!m_openglProgram)
+    if (!m_openGLProgram)
         return;
     makeCurrent();
-    m_openglObject.reset();
-    m_openglProgram.reset();
+    m_openGLObject.reset();
+    m_openGLProgram.reset();
     doneCurrent();
 }
 
-void ModelWidget::initializeGL()
-{
-    connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &ModelWidget::cleanup);
-}
-
 void ModelWidget::disableCullFace()
 {
     m_enableCullFace = false;
@@ -134,6 +132,20 @@ void ModelWidget::setMoveToPosition(const QVector3D &moveToPosition)
     m_moveToPosition = moveToPosition;
 }
 
+void ModelWidget::initializeGL()
+{
+    connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &ModelWidget::cleanup);
+
+    if (m_openGLVersion.isEmpty()) {
+        QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
+        const char *openGLVersion = (const char *)f->glGetString(GL_VERSION);
+        m_openGLVersion = nullptr != openGLVersion ? openGLVersion : "<Unknown>";
+        const char *shadingLanguageVersion = (const char *)glGetString(GL_SHADING_LANGUAGE_VERSION);
+        m_openGLShadingLanguageVersion = nullptr != shadingLanguageVersion ? shadingLanguageVersion : "<Unknown>";
+        m_openGLIsCoreProfile = QSurfaceFormat::defaultFormat().profile() == QSurfaceFormat::CoreProfile;
+    }
+}
+
 void ModelWidget::paintGL()
 {
     QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
@@ -157,18 +169,22 @@ void ModelWidget::paintGL()
     m_camera.setToIdentity();
     m_camera.translate(m_eyePosition.x(), m_eyePosition.y(), m_eyePosition.z());
 
-    if (!m_openglProgram) {
-        m_openglProgram = std::make_unique<ModelOpenGLProgram>();
-        const char *openglVersion = (const char *)f->glGetString(GL_VERSION);
-        m_openglProgram->load(nullptr != openglVersion && 
-            '\0' != openglVersion[0] && 
-            format().profile() == QSurfaceFormat::CoreProfile);
+    if (!m_openGLProgram) {
+        m_openGLProgram = std::make_unique<ModelOpenGLProgram>();
+        m_openGLProgram->load(format().profile() == QSurfaceFormat::CoreProfile);
     }
 
-    m_openglProgram->bind();
-    if (m_openglObject)
-        m_openglObject->draw();
-    m_openglProgram->release();
+    m_openGLProgram->bind();
+
+    m_openGLProgram->setUniformValue(m_openGLProgram->getUniformLocationByName("projectionMatrix"), m_projection);
+    m_openGLProgram->setUniformValue(m_openGLProgram->getUniformLocationByName("modelMatrix"), m_world);
+    m_openGLProgram->setUniformValue(m_openGLProgram->getUniformLocationByName("viewMatrix"), m_camera);
+    m_openGLProgram->setUniformValue(m_openGLProgram->getUniformLocationByName("defaultColor"), QVector4D(1.0, 1.0, 1.0, 1.0));
+
+    if (m_openGLObject)
+        m_openGLObject->draw();
+        
+    m_openGLProgram->release();
 }
 
 void ModelWidget::updateProjectionMatrix()
@@ -408,9 +424,9 @@ void ModelWidget::setMousePickRadius(float radius)
 
 void ModelWidget::updateMesh(Model *mesh)
 {
-    if (!m_openglObject)
-        m_openglObject = std::make_unique<ModelOpenGLObject>();
-    m_openglObject->update(std::unique_ptr<Model>(mesh));
+    if (!m_openGLObject)
+        m_openGLObject = std::make_unique<ModelOpenGLObject>();
+    m_openGLObject->update(std::unique_ptr<Model>(mesh));
     emit renderParametersChanged();
     update();
 }

application/sources/model_widget.h

@@ -8,6 +8,7 @@
 #include <QMutex>
 #include <QVector2D>
 #include <QTimer>
+#include <QString>
 #include "model.h"
 #include "model_opengl_program.h"
 #include "model_opengl_object.h"
@@ -55,6 +56,7 @@ public:
     int zRot();
     const QVector3D &eyePosition();
     const QVector3D &moveToPosition();
+    const QString &openGLVersion();
 public slots:
     void setXRotation(int angle);
     void setYRotation(int angle);
@@ -79,8 +81,8 @@ private:
     int m_yRot = m_defaultYRotation;
     int m_zRot = m_defaultZRotation;
     int m_directionOnMoveStart = 0;
-    std::unique_ptr<ModelOpenGLProgram> m_openglProgram;
-    std::unique_ptr<ModelOpenGLObject> m_openglObject;
+    std::unique_ptr<ModelOpenGLProgram> m_openGLProgram;
+    std::unique_ptr<ModelOpenGLObject> m_openGLObject;
     bool m_moveStarted = false;
     bool m_moveEnabled = true;
     bool m_zoomEnabled = true;
@@ -104,8 +106,8 @@ private:
     bool m_moveAndZoomByWindow = true;
     bool m_enableCullFace = true;
     bool m_notGraphics = false;
+
     std::pair<QVector3D, QVector3D> screenPositionToMouseRay(const QPoint &screenPosition);
-private:
     void updateProjectionMatrix();
     void normalizeAngle(int &angle);
 public:
@@ -113,6 +115,9 @@ public:
     static int m_defaultYRotation;
     static int m_defaultZRotation;
     static QVector3D m_defaultEyePosition;
+    static QString m_openGLVersion;
+    static QString m_openGLShadingLanguageVersion;
+    static bool m_openGLIsCoreProfile;
 };
 
 #endif