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void Torus(double const majorRadius, double const minorRadius, double const resolution,
double const angle)
{
double majorArcLength(fabs(angle)*(majorRadius+minorRadius));
double minorArcLength(TwoPi*minorRadius);
int majorSegments(ceil(majorArcLength/resolution));
int minorSegments(ceil(minorArcLength/resolution));
return Torus(majorRadius, minorRadius, majorSegments, minorSegments, angle);
}
static void render_image(void)
{
GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
GLfloat red_mat[] = { 1.0, 0.2, 0.2, 1.0 };
GLfloat green_mat[] = { 0.2, 1.0, 0.2, 1.0 };
GLfloat blue_mat[] = { 0.2, 0.2, 1.0, 1.0 };
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0);
glMatrixMode(GL_MODELVIEW);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glPushMatrix();
glRotatef(20.0, 1.0, 0.0, 0.0);
glPushMatrix();
glTranslatef(-0.75, 0.5, 0.0);
glRotatef(90.0, 1.0, 0.0, 0.0);
glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat );
Torus(0.275, 0.85, 20, 20);
glPopMatrix();
glPushMatrix();
glTranslatef(-0.75, -0.5, 0.0);
glRotatef(270.0, 1.0, 0.0, 0.0);
glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat );
Cone(1.0, 2.0, 16, 1);
glPopMatrix();
glPushMatrix();
glTranslatef(0.75, 0.0, -1.0);
glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
Sphere(1.0, 20, 20);
glPopMatrix();
glPopMatrix();
/* This is very important!!!
* Make sure buffered commands are finished!!!
*/
glFinish();
}
void ShapesUI::draw() {
// Sets up the viewport and background color
setup3DDrawing( Color( 0,0,0 ), width, height, true );
// Changes the way triangles are drawn
switch ( shapesUI->getDisplayType() ) {
case DISPLAY_WIREFRAME: {
glDisable(GL_LIGHTING);
glPolygonMode(GL_FRONT, GL_LINE);
glColor3f(1.0f, 1.0f, 1.0f);
} break;
case DISPLAY_FLAT_SHADING: {
glEnable(GL_LIGHTING);
glPolygonMode(GL_FRONT, GL_FILL);
glColor3f(1.0f, 1.0f, 1.0f);
glShadeModel(GL_FLAT);
} break;
case DISPLAY_SMOOTH_SHADING: {
glEnable(GL_LIGHTING);
glPolygonMode(GL_FRONT, GL_FILL);
glColor3f(1.0f, 1.0f, 1.0f);
glShadeModel(GL_SMOOTH);
} break;
default: break;
}
// Setup the camera
gluLookAt( 3.5 * cos( shapesUI->getYRot() ) * cos( shapesUI->getXRot() ),
3.5 * sin( shapesUI->getYRot() ),
3.5 * cos( shapesUI->getYRot() ) * sin( shapesUI->getXRot() ), 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
// ToDo: draw your shape here
// DO NOT put the actual draw OpenGL code here - put it in the shape class and call the draw method
if (current != 0){
if(shapesUI->getShapeType() != SHAPE_TORUS) {
current->draw();
}
else
Torus(5,5);
}
endDrawing();
}
/*
* Draw scene
* light>0 lit colors
* light<0 shaded colors
* light=0 shadow volumes
*/
void Scene(int Light)
{
int k; // Counters used to draw floor
// Set global light switch (used in DrawPolyShadow)
light = Light;
// Texture (pi.bmp)
glBindTexture(GL_TEXTURE_2D,tex2d[2]);
// Enable textures if not drawing shadow volumes
if (light) glEnable(GL_TEXTURE_2D);
// Draw objects x y z th,ph dims
if (obj&0x01) Cube(-0.8,+0.8,0.0 , -0.25*zh, 0 , 0.3 );
if (obj&0x02) Cylinder(+0.8,+0.5,0.0 , 0.5*zh,zh , 0.2,0.5);
if (obj&0x04) Torus(+0.5,-0.8,0.0 , 0,zh , 0.5,0.2);
if (obj&0x08) Teapot(-0.5,-0.5,0.0 , 2*zh, 0 , 0.25 );
// Disable textures
if (light) glDisable(GL_TEXTURE_2D);
// The floor, ceiling and walls don't cast a shadow, so bail here
if (!light) return;
// Always enable textures
glEnable(GL_TEXTURE_2D);
Color(1,1,1);
// Water texture for floor and ceiling
glBindTexture(GL_TEXTURE_2D,tex2d[0]);
for (k=-1;k<=box;k+=2)
Wall(0,0,0, 0,90*k , 8,8,box?6:2 , 4);
// Crate texture for walls
glBindTexture(GL_TEXTURE_2D,tex2d[1]);
for (k=0;k<4*box;k++)
Wall(0,0,0, 90*k,0 , 8,box?6:2,8 , 1);
// Disable textures
glDisable(GL_TEXTURE_2D);
}
