//--------------------------------------------------------------------------------------
// Name: GenOrthoMatrix
// Desc: Generate a orthogonal matrix
//--------------------------------------------------------------------------------------
void GLCVUtils::GenOrthoMatrix(float left,float right,float bottom,float top,float zNear,float zFar, float *m)
{
float tx=-(right+left)/(right-left);
float ty=-(top+bottom)/(top-bottom);
float tz=-(zFar+zNear)/(zFar-zNear);
LoadIdentityMatrix4x4 (m);
m[0]=2/(right-left);
m[5]=2/(top-bottom);
m[10]=-2/(zFar-zNear);
m[12]=tx;
m[13]=ty;
m[14]=tz;
}
int preRender()
{
// load and compiler vertex/fragment shaders.
LoadShaders("resources/shaders/vs_phong.vert", "resources/shaders/fs_phong.frag", g_hPShaderProgram);
LoadShaders("resources/shaders/vs_texture.vert", "resources/shaders/fs_texture.frag", g_hTXShaderProgram );
//init assImp stream
stream = aiGetPredefinedLogStream(aiDefaultLogStream_STDOUT,NULL);
aiAttachLogStream(&stream);
//write stream to log
stream = aiGetPredefinedLogStream(aiDefaultLogStream_FILE,"assimp_log.txt");
aiAttachLogStream(&stream);
ilInit(); //if you use textures, do this.
if (g_hPShaderProgram != 0)
{
projMatrixLoc= glGetUniformLocation(g_hPShaderProgram, "projMatrix");
viewMatrixLoc= glGetUniformLocation(g_hPShaderProgram, "viewMatrix");
} else {
printf("phong shader program not compiled/linked\n");
return 1;
}
if (g_hTXShaderProgram != 0)
{
projMatrixLoc= glGetUniformLocation(g_hTXShaderProgram, "projMatrix");
viewMatrixLoc= glGetUniformLocation(g_hTXShaderProgram, "viewMatrix");
} else {
printf("Texture shader program not compiled/linked\n");
return 1;
}
// Build a perspective projection matrix.
PerspectiveMatrix4x4 ( matProj, 70.f, 1.3333f, 0.1f, 200.f);
LoadIdentityMatrix4x4 (matModelView);
TranslateMatrix4x4 (matModelView, 0, 0, -20.0f); //(0, -2, -10)
RotateMatrix4x4 (matModelView, -90, X_AXIS);
RotateMatrix4x4 (matModelView, -90, Y_AXIS);
return 0;
}
