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passing poylNormal, tangent, bitangent to shader

This commit is contained in:
Anakin 2017-02-05 16:57:12 +01:00
parent cdf19911f6
commit 30f1a1e627
3 changed files with 60 additions and 24 deletions
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1
QtMeshViewer/Header/GeometryEngine.h
View File

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

4
QtMeshViewer/Resources/fshader.glsl
View File

@ -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;

77
QtMeshViewer/Source/GeometryEngine.cpp
View File

@ -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
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 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));
//setup the pipeline
setupPipeline(program);
// Paint