void ReSizeGLScene(int Width, int Height)
{
int xRange = 10, yRange = 10, zRange = 100;
windowWidth=Width;
windowHeight=Height;
if (Height==0)
Height=1;
glViewport(0, 0, Width, Height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(useMyOrtho) {
if (Width <= Height)
myOrtho (-xRange, xRange, -yRange*Height/Width, yRange*Height/Width, -zRange, zRange);
else
myOrtho (-xRange*Width/Height, xRange*Width/Height, -yRange, yRange, -zRange, zRange);
} else {
if (Width <= Height)
glOrtho (-xRange, xRange, -yRange*Height/Width, yRange*Height/Width, -zRange, zRange);
else
glOrtho (-xRange*Width/Height, xRange*Width/Height, -yRange, yRange, -zRange, zRange);
}
/*
glLoadIdentity();
gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f);
*/
glMatrixMode(GL_MODELVIEW);
}
void updateProjection(int width, int height){
float projectionTransform[16];
glViewport( 0, 0, (GLsizei)width, (GLsizei)height );
double ratio = double(width) / double(height);
glMatrixMode( GL_PROJECTION );
if( isPerspective && useGLPerspective){
// perspective and use OpenGL
glPushMatrix( );
glLoadIdentity( );
gluPerspective(90.0, ratio, 1.0, 25.0);
glGetFloatv(GL_PROJECTION_MATRIX, projectionTransform);
glPopMatrix( );
}else if( isPerspective && !useGLPerspective ){
// perspective and do not use OpenGL
myPerspective(projectionTransform, 90.0, ratio, 1.0, 25.0);
}else if( !isPerspective && useGLPerspective ){
// orthographic and use OpenGL
glPushMatrix( );
glLoadIdentity( );
glOrtho(-7.0, 7.0, -7.0, 7.0, 1.0, 25.0);
glGetFloatv(GL_PROJECTION_MATRIX, projectionTransform);
glPopMatrix( );
}else if( !isPerspective && !useGLPerspective ){
// orthographic and do not use OpenGL
myOrtho(projectionTransform, -7.0, 7.0, -7.0, 7.0, 1.0, 25.0);
}
glLoadMatrixf(projectionTransform);
}
int main()
{
//init vertex
Vector3f v1 = Vector3f(0.3, 0.3, 0.3);
Vector3f v2 = Vector3f(0.3, 0.3, 0.6);
//print Vertex
puts("Init Vertex");
PrintVertex(v1); PrintVertex(v2);
//set Camera
myLookAt(Vector3f(0.0, 0.0, 2.0), Vector3f(0.0, 0.0, 0.0), Vector3f(0.0, 1.0, 0.0));
//set Ortho
myOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
//print Vertex
puts("Ortho");
PrintVertex(DrawVertex(v1)); PrintVertex(DrawVertex(v2));
//set Frustum
myFrustum(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
//print Vertex
puts("Frustum");
PrintVertex(DrawVertex(v1)); PrintVertex(DrawVertex(v2));
getchar();
return 0;
}
void adjustCamera(){
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
if(curBallCamera){
if( balls.size() <=0 ){
myOrtho(cannonBaseX , cannonBaseY);
}
else{
myOrtho( balls[balls.size()-1]->ballX ,balls[balls.size()-1]->ballY);
}
}
else if(cannonCamera){
myOrtho(cannonBaseX , cannonBaseY);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}