passing poylNormal, tangent, bitangent to shader

QtMeshViewer/Header/GeometryEngine.h

@@ -34,6 +34,7 @@ private:
 // functions
 private:
 	void clearData();
+	void setupPipeline(QOpenGLShaderProgram * program);
 
 public:
 	void drawGeometry(QOpenGLShaderProgram *program);

QtMeshViewer/Resources/fshader.glsl

@@ -22,6 +22,10 @@ uniform struct Light {
 	float ambientCoefficient;
 } light;
 
+attribute vec3 a_polyNorm;
+attribute vec3 a_polyTan;
+attribute vec3 a_polyBiTan;
+
 varying vec2 v_surfaceUV;
 varying vec3 v_surfacePosition;
 varying vec3 v_surfaceNormal;

QtMeshViewer/Source/GeometryEngine.cpp

@@ -52,6 +52,58 @@ void GeometryEngine::clearData()
 	m_drawList.clear();
 }
 
+void GeometryEngine::setupPipeline(QOpenGLShaderProgram *program)
+{
+	// Offset for position
+	quintptr offset = 0;
+
+	// Tell OpenGL programmable pipeline how to locate vertex position data
+	int vertexLocation = program->attributeLocation("a_position");
+	program->enableAttributeArray(vertexLocation);
+	program->setAttributeBuffer(vertexLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
+
+	// Offset for texture coordinate
+	offset += sizeof(QVector3D);
+
+	// Tell OpenGL programmable pipeline how to locate vertex texture coordinate data
+	int texcoordLocation = program->attributeLocation("a_texcoord");
+	program->enableAttributeArray(texcoordLocation);
+	program->setAttributeBuffer(texcoordLocation, GL_FLOAT, offset, 2, sizeof(VertexData));
+
+	//Offset for vertexNormal
+	offset += sizeof(QVector2D);
+
+	// Tell OpenGL programmable pipeline how to locate vertex normal data
+	int vertNormLocation = program->attributeLocation("a_normal");
+	program->enableAttributeArray(vertNormLocation);
+	program->setAttributeBuffer(vertNormLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
+
+	//Offset for polygonNormal
+	offset += sizeof(QVector3D);
+
+	// Tell OpenGL programmable pipeline how to locate polygon normal data
+	int polyNormLocation = program->attributeLocation("a_polyNorm");
+	program->enableAttributeArray(polyNormLocation);
+	program->setAttributeBuffer(polyNormLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
+
+	//Offset for polygonTangent
+	offset += sizeof(QVector3D);
+
+	// Tell OpenGL programmable pipeline how to locate polygon tangent data
+	int polyTanLocation = program->attributeLocation("a_polyTan");
+	program->enableAttributeArray(polyTanLocation);
+	program->setAttributeBuffer(polyTanLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
+
+	//Offset for polygonBitangent
+	offset += sizeof(QVector3D);
+
+	// Tell OpenGL programmable pipeline how to locate polygon bitangent data
+	int polyBiTanLocation = program->attributeLocation("a_polyBiTan");
+	program->enableAttributeArray(polyBiTanLocation);
+	program->setAttributeBuffer(polyBiTanLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
+
+}
+
 void GeometryEngine::drawGeometry(QOpenGLShaderProgram *program)
 {
 	if (!m_arrayBuf.isCreated() || !m_indexBuf.isCreated())
@@ -72,29 +124,8 @@ void GeometryEngine::drawGeometry(QOpenGLShaderProgram *program)
 	// Allways use texture unit 0
 	program->setUniformValue("texture", 0);
 
-	// Offset for position
+	//setup the pipeline
-	quintptr offset = 0;
+	setupPipeline(program);
-
-	// Tell OpenGL programmable pipeline how to locate vertex position data
-	int vertexLocation = program->attributeLocation("a_position");
-	program->enableAttributeArray(vertexLocation);
-	program->setAttributeBuffer(vertexLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
-
-	// Offset for texture coordinate
-	offset += sizeof(QVector3D);
-
-	// Tell OpenGL programmable pipeline how to locate vertex texture coordinate data
-	int texcoordLocation = program->attributeLocation("a_texcoord");
-	program->enableAttributeArray(texcoordLocation);
-	program->setAttributeBuffer(texcoordLocation, GL_FLOAT, offset, 2, sizeof(VertexData));
-
-	//Offset for normal
-	offset += sizeof(QVector2D);
-
-	// Tell OpenGL programmable pipeline how to locate vertex normal data
-	int normLocation = program->attributeLocation("a_normal");
-	program->enableAttributeArray(normLocation);
-	program->setAttributeBuffer(normLocation, GL_FLOAT, offset, 3, sizeof(VertexData));
 	
 	// Paint