void OpenGLEngine::Initialize ()
{
m_ClearDepth = 1.0f;
m_ClearColor = glm::vec4 (0.0f, 0.0f, 0.0f, 1.0f);
SetViewport (glm::vec4 (0.0f, 0.0f, 0.0f, 0.0f));
SetDepthRange (0.0f, 1.0f);
m_DefaultBlendState = std::make_shared<BlendState> ();
m_DefaultDepthStencilState = std::make_shared<DepthStencilState> ();
m_DefaultRasterizerState = std::make_shared<RasterizerState> ();
SetDefaultBlendState();
SetDefaultDepthStencilState();
SetDefaultRasterizerState();
}
// sets the range for the view frustum ( and z buffer range )
void C3dView::SetDepthRange ( float xFarZ )
{
SetDepthRange(m_xNearZ,xFarZ);
}
// initalise the OpenGL context
void C3dView::InitGL ( long iX,long iY)
{
m_iViewportX = iX;
m_iViewportY = iY;
m_fAspect = 1.33f;
if (m_iViewportY != 0)
m_fAspect = (float) m_iViewportX / (float) m_iViewportY;
// set the projection matrix and viewport info
SetDepthRange(m_xNearZ,m_xFarZ);
// set the BG color
glClearColor ((float)m_BackGroundColor.r, (float)m_BackGroundColor.g, (float)m_BackGroundColor.b, 1.0);
glClearDepth(1.0f); // Depth Buffer Setup
// make everything look it's best not fastest.
glHint(GL_PERSPECTIVE_CORRECTION_HINT ,GL_NICEST);
// we want a z buffer
glEnable (GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do
// we want back face culling
glEnable (GL_CULL_FACE);
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
// we want smooth filled polies
glShadeModel (GL_SMOOTH);
glPolygonMode (GL_FRONT, GL_FILL);
glEnable (GL_LIGHTING);
EnabletLight(0,true);
float f[4] = {1.0f};
f[0] = f[1] = f[2] = 0.25f;
SetLightInfo(0,eLightAmb,f);
f[0] = f[1] = f[2] = 0.60f;
SetLightInfo(0,eLightDif,f);
f[0] = f[1] = f[2] = 0.60f;
SetLightInfo(0,eLightSpec,f);
f[0] = 0;f[1] = 0;f[2] = 10.0f;
SetLightInfo(0,eLightPos,f);
UpdateLights();
// but only enable one ?!?
// glEnable (GL_LIGHT0);
// we want alpha based transperancy
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glEnable (GL_COLOR_MATERIAL);
// clear out the model view matrix
glMatrixMode(GL_MODELVIEW);
glLoadIdentity ();
}
