/*
Function: Runs the application display
Flow:
- Check key operations as they may have adverse effects on the
display state e.g may require the display matrix to move forward
- Set Clear color ( RED in this case )
- Clear the color buffer ( Using GL_COLOR_BUFFER_BIT )
information in other buffers will come later
- Load the Identity Matrix ( Poorly named me thinks )
to reset our drawing locations
- Move the camera to look in the required direction
- Render object to screen ( Will render at location: 0, 0, -5 )
- Swap buffers
- Calcualte transofrmations for object
End State:
Rendering of picture to the the window of the application
*/
void display(void)
{
/*
Check any keyboard operations that may alter the display of the
next frame
*/
keyOperations();
keySpecialOperations();
texture = LoadTexture("texture.raw", 256, 256);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texture);
// Clear color is set to RED
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
// Clear the color buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
// Set lights up
GLfloat DiffuseLight[] = { diffuseLightRed, diffuseLightGreen, diffuseLightBlue };
GLfloat AmbientLight[] = { ambientLightRed, ambientLightGreen, ambientLightBlue };
glLightfv (GL_LIGHT0, GL_DIFFUSE, DiffuseLight); //change the light accordingly
glLightfv (GL_LIGHT1, GL_AMBIENT, AmbientLight); //change the light accordingly
// Set light position
GLfloat LightPosition[] = {lightX, lightY, lightZ, lightW}; // lightW indicates if it is a point light
glLightfv (GL_LIGHT0, GL_POSITION, LightPosition); //change the light accordingly
// Reset Identity Matrix
//glLoadIdentity();
// Light the scene
//light();
// Look at a point
gluLookAt (ViewPositionX, ViewPositionY, ViewPositionZ - 10.0,
ViewPositionX, ViewPositionY, ViewPositionZ, 0.0, 1.0, 0.0);
// Render objects
//renderPrimitive();
glTranslatef(0, 0, -5);
glCallList(cubelist);
// Swap the old buffer out for the new rendered image
glutSwapBuffers();
// Increase angle
angle += 0.1;
}
/*
Function: Runs the application display
Flow:
- Check key operations as they may have adverse effects on the
display state e.g may require the display matrix to move forward
- Set Clear color ( RED in this case )
- Clear the color buffer ( Using GL_COLOR_BUFFER_BIT )
information in other buffers will come later
- Load the Identity Matrix ( Poorly named me thinks )
to reset our drawing locations
- Move the scene back 5 units as the camera is located at ( 0, 0, 0 )
- Render object to screen ( Will render at location: 0, 0, -5 )
- Flush all calls from OpenGL to the window
End State:
Rendering of picture to the the window of the application
*/
void display(void)
{
/*
Check any keyboard operations that may alter the display of the
next frame
*/
keyOperations();
keySpecialOperations();
// Clear color is set to RED
glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
// Clear the color buffer
glClear(GL_COLOR_BUFFER_BIT);
// Reset Identity Matrix
glLoadIdentity();
// Move the scene 5 units back as the camera will be located at ( 0, 0, 0 )
glTranslatef(0.0f, 0.0f, -5.0f);
// Transformation and Rotation code
glTranslatef(0.0f, yLocation, 0.0f);
glRotatef(yRotationAngle, 0.0f, 1.0f, 0.0f);
// Render our objects
//renderPrimitive();
glutWireCube(2.0f);
// Flush all commands to the window
glFlush();
// Update object position ( Rotation and Translation)
if ( movingUp )
yLocation -= 0.005f;
else
yLocation += 0.005f;
if ( yLocation < -3.0f )
movingUp = false;
else if ( yLocation > 3.0f )
movingUp = true;
yRotationAngle += 0.005f;
if ( yRotationAngle > 360.0f )
yRotationAngle -= 360.0f;
}
void drawScene()
{
GLfloat x,y,z;
glColor3f(1.0f,1.0f,1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
keySpecialOperations();/*
if(keyStates['w'])
{
fprintf(stdout,"* cameraz=%f\nreferencez=%f\n",cameraz,referencez);
}*/
//gluLookAt(-5*TRACK_WIDTH-13.5,12,18,-TRACK_WIDTH-13.5,2,-1,0,1,0);
gluLookAt(camerax,cameray,cameraz,referencex,referencey,referencez,upx,upy,upz);
// tack draw
trackStraight(-(TRACK_WIDTH/2.0f),(TRACK_WIDTH/2.0f),-(6*TorusRadius),0);
trackStraight(-(TRACK_WIDTH/2.0f),(TRACK_WIDTH/2.0f),0,3*CAR_LENGTH);
bumpdraw(-(TRACK_WIDTH/2.0f)-1.5,CAR_LENGTH,1);
BumpyTrack(-(TRACK_WIDTH/2.0f),(TRACK_WIDTH/2.0f),3*CAR_LENGTH,6*CAR_LENGTH,(TorusRadius/2.0f));
trackStraight(-(TRACK_WIDTH/2.0f),(TRACK_WIDTH/2.0f),6*CAR_LENGTH,9*CAR_LENGTH);
bumpdraw((TRACK_WIDTH/2.0f),6*CAR_LENGTH,0);
for(GLint i=0;i<=3*GRASS_WIDTH;i+=GRASS_WIDTH)
{
grass(-(TRACK_WIDTH/2.0f)-i,(TRACK_WIDTH/2.0f)-i,-(6*TorusRadius),0);
grass(-(TRACK_WIDTH/2.0f)-i,(TRACK_WIDTH/2.0f)-i,1,3*CAR_LENGTH);
grass(-(TRACK_WIDTH/2.0f)-i,(TRACK_WIDTH/2.0f)-i,3*CAR_LENGTH+1,6*CAR_LENGTH);
grass(-(TRACK_WIDTH/2.0f)-i,(TRACK_WIDTH/2.0f)-i,6*CAR_LENGTH+1,9*CAR_LENGTH-1);
}
turnleft(-(TRACK_WIDTH/2.0f)-1,6*CAR_LENGTH,1);
trackTurnLeft(-(TRACK_WIDTH/2.0f),(TRACK_WIDTH/2.0f),9*CAR_LENGTH,13*CAR_LENGTH,0,180.0f);
trackStraight(-5*TRACK_WIDTH-2.25,-4*TRACK_WIDTH-2.25,6*CAR_LENGTH,9*CAR_LENGTH);
BumpyTrack(-5*TRACK_WIDTH-2.25,-4*TRACK_WIDTH-2.25,3*CAR_LENGTH,6*CAR_LENGTH,(TorusRadius/2.0f));
trackStraight(-5*TRACK_WIDTH-2.25,-4*TRACK_WIDTH-2.25,0,3*CAR_LENGTH);
trackStraight(-5*TRACK_WIDTH-2.25,-4*TRACK_WIDTH-2.25,-(6*TorusRadius),0);
trackTurnLeft(-(TRACK_WIDTH/2.0f),(TRACK_WIDTH/2.0f),-1.2*CAR_LENGTH,2.8*CAR_LENGTH,180.0f,355.5f);
//trackTurnRight(-(int)(TRACK_WIDTH/2.0f)-1,(int)(TRACK_WIDTH/2.0f),8*CAR_LENGTH,12*CAR_LENGTH,180.0f);
glTranslatef(0.0f,TorusRadius-(TorusRadius/2.75),0.0f);
glScalef(0.5f,0.5f,0.5f);
assembly();
glScalef(2.0f,2.0f,2.0f);
glTranslatef(0.0f,-TorusRadius+(TorusRadius/2.75),0.0f);
glFlush();
glPopMatrix();
}
