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 DrawGLScene()
{
float cameraX = 20.0*cos(cameraRotation);
float cameraZ = 20.0*sin(cameraRotation);
double stretch,height,position,rotation;
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
glLoadIdentity ();
if(useMyLookat)
myLookAt (cameraX, cameraHeight,cameraZ, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
else
gluLookAt (cameraX, cameraHeight,cameraZ, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
position=cos((double)frame*speed)*2;
height=absf(sin((double)frame*speed)*10)+1;
rotation=cos((double)frame*speed)*90;
if(doTranslate) {
if(height<2) stretch=height/2; else stretch=1;
} else {
stretch=sin((double)frame*speed/3)+1.5;
}
glPushMatrix();
glTranslatef(0,-5,0);
glScalef(8,0.2,8);
drawCube();
glPopMatrix();
glPushMatrix();
glTranslatef(2,-5,0);
glScalef(1.2,-0.5,1.2);
drawCube();
glPopMatrix();
glPushMatrix();
glTranslatef(-2,-5,0);
glScalef(1.2,-0.5,1.2);
drawCube();
glPopMatrix();
if(doTranslate) glTranslatef(position,height-5,0.0);
if(doRotate) glRotatef(rotation,0,1,0);
if(doScale) glScalef(1/sqrt(stretch),stretch,1/sqrt(stretch));
drawCube();
frame++;
cameraRotation += cameraRotationSpeed;
cameraHeight = cameraHeight*0.99 + cameraHeightTarget*0.01;
glutSwapBuffers();
}
void displayCallback( ){
const float centerPosition[] = {0.0, 0.0, 0.0};
float viewingTransform[16];
float modelingTransform[16];
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
myLookAt( viewingTransform,
eyePosition[0], eyePosition[1], eyePosition[2],
centerPosition[0], centerPosition[1], centerPosition[2],
upVector[0], upVector[1], upVector[2], camZ
);
// Set light & material properties for the teapot;
// lights are transformed by current modelview matrix
// such that they are positioned correctly in the scene.
matMultVec4f( light0, light0_position, viewingTransform );
matMultVec4f( light1, light1_position, viewingTransform );
matMultVec4f( light2, light2_position, viewingTransform );
matMultVec4f( light3, light3_position, viewingTransform );
shaderProgram_A->activate( );
activateUniforms_A( );
glLoadIdentity( );
glMultMatrixf(viewingTransform);
myScalef(modelingTransform,
teapotScale_A[0], teapotScale_A[1], teapotScale_A[2]);
glMultMatrixf(modelingTransform);
myTranslatef(modelingTransform,
teapotTranslation_A[0],
teapotTranslation_A[1],
teapotTranslation_A[2]);
glMultMatrixf(modelingTransform);
_glutSolidTeapot(1.3);
shaderProgram_B->activate( );
activateUniforms_B( );
glLoadIdentity( );
glMultMatrixf(viewingTransform);
myTranslatef(modelingTransform,
teapotTranslation_B[0],
teapotTranslation_B[1],
teapotTranslation_B[2]);
glMultMatrixf(modelingTransform);
_glutSolidTeapot(1.3);
glutSwapBuffers();
}