GRendering::GRendering(GSceneManager* p_sceneManager)
{
initGLSL();
sm_sceneMgr = p_sceneManager;
createFBO();
}
void SW::GLViewer::init()
{
setGL();
initGLSL();
#if BUFFER_
//glClearColor(0.0, 0.0, 0.0, 0.0);
//glDisable(GL_DITHER);
glShadeModel(GL_FLAT);
//glEnable(GL_DEPTH_TEST);
enum{Vertices, Color, Elements, NumVBOs};
GLuint buffers[NumVBOs];
// glew init is very important or errors occur
glewInit();
// generate vertex arrays, and each array is corresponding to a object to be render
glGenVertexArrays(1, &arrayId);
#ifdef QT_BUFFER
QGLFunctions qtgl;
qtgl.initializeGLFunctions(0);
#endif
// 3D world coordinate of points
#ifdef QT_BUFFER
QVector<QVector3D> Verts;
Verts.append(QVector3D(-1.0, -1.0, -1.0));
Verts.append(QVector3D(-1.0, -1.0, 1.0));
Verts.append(QVector3D(-1.0, 1.0, -1.0));
Verts.append(QVector3D(-1.0, 1.0, 1.0));
Verts.append(QVector3D(1.0, -1.0, -1.0));
Verts.append(QVector3D(1.0, -1.0, 1.0));
Verts.append(QVector3D(1.0, 1.0, -1.0));
Verts.append(QVector3D(1.0, 1.0, 1.0));
#else
GLfloat Verts[][3] = {
{-1.0, -1.0, -1.0},
{-1.0, -1.0, 1.0},
{-1.0, 1.0, -1.0},
{-1.0, 1.0, 1.0},
{1.0, -1.0, -1.0},
{1.0, -1.0, 1.0},
{1.0, 1.0, -1.0},
{1.0, 1.0, 1.0},
};
#endif
// colors of points
#ifdef QT_BUFFER
QVector<QVector3D> Colors;
Colors.append(QVector3D(0, 0.0, 0.0));
Colors.append(QVector3D(0, 0.0, 1.0));
Colors.append(QVector3D(0, 1.0, 0.0));
Colors.append(QVector3D(0, 1.0, 1.0));
Colors.append(QVector3D(1.0, 0.0, 0.0));
Colors.append(QVector3D(1.0, 0.0, 1.0));
Colors.append(QVector3D(1.0, 1.0, 0.0));
Colors.append(QVector3D(1.0, 1.0, 1.0));
#else
GLfloat Colors[][3] = {
{0.0, 0.0, 0.0},
{0.0, 0.0, 1.0},
{0.0, 1.0, 0.0},
{0.0, 1.0, 1.0},
{1.0, 0.0, 0.0},
{1.0, 0.0, 1.0},
{1.0, 1.0, 0.0},
{1.0, 1.0, 1.0},
};
#endif
// indices of points
#ifdef QT_BUFFER
QVector<uint> Indices;
Indices.append(0);Indices.append(1);Indices.append(3);Indices.append(2);
Indices.append(4);Indices.append(6);Indices.append(7);Indices.append(5);
Indices.append(2);Indices.append(3);Indices.append(7);Indices.append(6);
Indices.append(0);Indices.append(4);Indices.append(5);Indices.append(1);
Indices.append(0);Indices.append(2);Indices.append(6);Indices.append(4);
Indices.append(1);Indices.append(5);Indices.append(7);Indices.append(3);
#else
GLubyte Indices[]={
0, 1, 3, 2,
4, 6, 7, 5,
2, 3, 7, 6,
0, 4, 5, 1,
0, 2, 6, 4,
1, 5, 7, 3,
};
#endif
// active a vertex array
glBindVertexArray(arrayId);
// generate buffer objects, and each attribute(vertices, color, and normal..) is corresponding to one buffer
#ifdef QT_BUFFER
qtgl.glGenBuffers(NumVBOs, buffers);
#else
glGenBuffers(NumVBOs, buffers);
#endif
//---------------------------------------buffer for vertices----------------------------------//
// active a buffer object
#ifdef QT_BUFFER
qtgl.glBindBuffer(GL_ARRAY_BUFFER, buffers[Vertices]);
#else
glBindBuffer(GL_ARRAY_BUFFER, buffers[Vertices]);
#endif
// alloc a space for buffer
#ifdef QT_BUFFER
qtgl.glBufferData(GL_ARRAY_BUFFER, Verts.size()*sizeof(GLfloat), Verts.data(), GL_STATIC_DRAW);
#else
glBufferData(GL_ARRAY_BUFFER, sizeof(Verts), Verts, GL_STATIC_DRAW);
#endif
// put the data into the corresponding buffer
glVertexPointer(3, GL_FLOAT, 0,BUFFER_OFFSET(0));
glEnableClientState(GL_VERTEX_ARRAY);
//---------------------------------------buffer for colors----------------------------------//
// buffer for colors
#ifdef QT_BUFFER
qtgl.glBindBuffer(GL_ARRAY_BUFFER, buffers[Color]);
#else
glBindBuffer(GL_ARRAY_BUFFER, buffers[Color]);
#endif
#ifdef QT_BUFFER
qtgl.glBufferData(GL_ARRAY_BUFFER, Colors.size()*sizeof(GLfloat), Colors.data(), GL_STATIC_DRAW);
#else
glBufferData(GL_ARRAY_BUFFER, sizeof(Colors), Colors, GL_STATIC_DRAW);
#endif
glColorPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0));
glEnableClientState(GL_COLOR_ARRAY);
//---------------------------------------buffer for elements----------------------------------//
// buffer for elements
#ifdef QT_BUFFER
numElement = Indices.size();
#else
numElement = sizeof(Indices)/sizeof(Indices[0]);
#endif
#ifdef QT_BUFFER
qtgl.glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[Elements]);
#else
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[Elements]);
#endif
#ifdef QT_BUFFER
qtgl.glBufferData(GL_ELEMENT_ARRAY_BUFFER, Indices.size()*sizeof(uint), Indices.data(), GL_STATIC_DRAW);
#else
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(Indices), Indices, GL_STATIC_DRAW);
#endif
#endif
}
