void RenderScene(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glRotatef(xRot, 1.0f, 0.0f, 0.0f);
glRotatef(yRot, 0.0f, 1.0f, 0.0f);
glColor3f(1.0,0.0,0.0);
kostka();
glPopMatrix();
float points[3][3] ={{-400.0f, -64.0, 200.0f},{400.0f, -64.0, 200.0f},{400.0f, -15.0, -200.0f}};
float lightPos[] = { 0.0, 150.0, 50.0, 1.0 };
MakeShadowMatrix(points, lightPos, shadowMat);
glPushAttrib(GL_LIGHTING_BIT);
glDisable(GL_LIGHTING);
glPushMatrix();
glMultMatrixf((float *)shadowMat);
glRotatef(xRot, 1.0f, 0.0f, 0.0f);
glRotatef(yRot, 0.0f, 1.0f, 0.0f);
glColor3f(0.0,0.0,0.0);
kostka2();
glPopMatrix();
glBegin(GL_POLYGON);
glRGB(0,128,0);
glVertex3f(-400.0f, -65.0, 200.0f);
glVertex3f(400.0f, -65.0, 200.0f);
glRGB(0,255,0);
glVertex3f(400.0f, -15.0, -200.0f);
glVertex3f(-400.0f, -15.0, -200.0f);
glEnd();
glPopAttrib();
glFlush ();
glutSwapBuffers();
}
// Called to draw scene
void RenderScene(void)
{
GLfloat cubeXform[4][4];
// Clear the window with current clearing color
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glShadeModel(GL_SMOOTH);
glEnable(GL_NORMALIZE);
glPushMatrix();
// Draw plane that the cube rests on
glDisable(GL_LIGHTING);
if(nStep == 5)
{
glColor3ub(255,255,255);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, textures[0]);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f);
glVertex3f(-100.0f, -25.3f, -100.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(-100.0f, -25.3f, 100.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex3f(100.0f, -25.3f, 100.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex3f(100.0f, -25.3f, -100.0f);
glEnd();
}
else
{
glColor3f(0.0f, 0.0f, 0.90f); // Blue
glBegin(GL_QUADS);
glVertex3f(-100.0f, -25.3f, -100.0f);
glVertex3f(-100.0f, -25.3f, 100.0f);
glVertex3f(100.0f, -25.3f, 100.0f);
glVertex3f(100.0f, -25.3f, -100.0f);
glEnd();
}
// Set drawing color to Red
glColor3f(1.0f, 0.0f, 0.0f);
// Enable, disable lighting
if(nStep > 2)
{
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glEnable(GL_COLOR_MATERIAL);
glLightfv(GL_LIGHT0, GL_AMBIENT, lightAmbient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, lightDiffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, lightSpecular);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glMaterialfv(GL_FRONT, GL_SPECULAR,lightSpecular);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, materialColor);
glMateriali(GL_FRONT, GL_SHININESS,128);
}
// Move the cube slightly forward and to the left
glTranslatef(-10.0f, 0.0f, 10.0f);
switch(nStep)
{
// Just draw the wire framed cube
case 0:
glutWireCube(50.0f);
break;
// Same wire cube with hidden line removal simulated
case 1:
// Front Face (before rotation)
glBegin(GL_LINES);
glVertex3f(25.0f,25.0f,25.0f);
glVertex3f(25.0f,-25.0f,25.0f);
glVertex3f(25.0f,-25.0f,25.0f);
glVertex3f(-25.0f,-25.0f,25.0f);
glVertex3f(-25.0f,-25.0f,25.0f);
glVertex3f(-25.0f,25.0f,25.0f);
glVertex3f(-25.0f,25.0f,25.0f);
glVertex3f(25.0f,25.0f,25.0f);
glEnd();
// Top of cube
glBegin(GL_LINES);
// Front Face
glVertex3f(25.0f,25.0f,25.0f);
glVertex3f(25.0f,25.0f,-25.0f);
glVertex3f(25.0f,25.0f,-25.0f);
glVertex3f(-25.0f,25.0f,-25.0f);
glVertex3f(-25.0f,25.0f,-25.0f);
glVertex3f(-25.0f,25.0f,25.0f);
glVertex3f(-25.0f,25.0f,25.0f);
glVertex3f(25.0f,25.0f,25.0f);
glEnd();
// Last two segments for effect
glBegin(GL_LINES);
glVertex3f(25.0f,25.0f,-25.0f);
glVertex3f(25.0f,-25.0f,-25.0f);
glVertex3f(25.0f,-25.0f,-25.0f);
glVertex3f(25.0f,-25.0f,25.0f);
glEnd();
break;
// Uniform colored surface, looks 2D and goofey
case 2:
glutSolidCube(50.0f);
break;
case 3:
glutSolidCube(50.0f);
break;
// Draw a shadow with some lighting
case 4:
glGetFloatv(GL_MODELVIEW_MATRIX, (GLfloat *) cubeXform);
glutSolidCube(50.0f);
glPopMatrix();
// Disable lighting, we'll just draw the shadow as black
glDisable(GL_LIGHTING);
glPushMatrix();
MakeShadowMatrix(ground, lightpos, cubeXform);
glMultMatrixf((GLfloat *)cubeXform);
glTranslatef(-10.0f, 0.0f, 10.0f);
// Set drawing color to Black
glColor3f(0.0f, 0.0f, 0.0f);
glutSolidCube(50.0f);
break;
case 5:
glColor3ub(255,255,255);
glGetFloatv(GL_MODELVIEW_MATRIX, (GLfloat *) cubeXform);
// Front Face (before rotation)
glBindTexture(GL_TEXTURE_2D, textures[1]);
glBegin(GL_QUADS);
glTexCoord2f(1.0f, 1.0f);
glVertex3f(25.0f,25.0f,25.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex3f(25.0f,-25.0f,25.0f);
glTexCoord2f(0.0f, 0.0f);
glVertex3f(-25.0f,-25.0f,25.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(-25.0f,25.0f,25.0f);
glEnd();
// Top of cube
glBindTexture(GL_TEXTURE_2D, textures[2]);
glBegin(GL_QUADS);
// Front Face
glTexCoord2f(0.0f, 0.0f);
glVertex3f(25.0f,25.0f,25.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex3f(25.0f,25.0f,-25.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex3f(-25.0f,25.0f,-25.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(-25.0f,25.0f,25.0f);
glEnd();
// Last two segments for effect
glBindTexture(GL_TEXTURE_2D, textures[3]);
glBegin(GL_QUADS);
glTexCoord2f(1.0f, 1.0f);
glVertex3f(25.0f,25.0f,-25.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex3f(25.0f,-25.0f,-25.0f);
glTexCoord2f(0.0f, 0.0f);
glVertex3f(25.0f,-25.0f,25.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(25.0f,25.0f,25.0f);
glEnd();
glPopMatrix();
// Disable lighting, we'll just draw the shadow as black
glDisable(GL_LIGHTING);
glDisable(GL_TEXTURE_2D);
glPushMatrix();
MakeShadowMatrix(ground, lightpos, cubeXform);
glMultMatrixf((GLfloat *)cubeXform);
glTranslatef(-10.0f, 0.0f, 10.0f);
// Set drawing color to Black
glColor3f(0.0f, 0.0f, 0.0f);
glutSolidCube(50.0f);
break;
}
glPopMatrix();
// Flush drawing commands
glutSwapBuffers();
}
