//////////////////////////////////////////////////////////////////
// This function does any needed initialization on the rendering
// context.
void SetupRC()
{
int iSphere;
// Calculate shadow matrix
M3DVector3f vPoints[3] = {{ 0.0f, -0.4f, 0.0f },
{ 10.0f, -0.4f, 0.0f },
{ 5.0f, -0.4f, -5.0f }};
// Grayish background
glClearColor(fLowLight[0], fLowLight[1], fLowLight[2], fLowLight[3]);
// Cull backs of polygons
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
// Setup light parameters
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, fNoLight);
glLightfv(GL_LIGHT0, GL_AMBIENT, fLowLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, fBrightLight);
glLightfv(GL_LIGHT0, GL_SPECULAR, fBrightLight);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
// Get the plane equation from three points on the ground
M3DVector4f vPlaneEquation;
m3dGetPlaneEquation(vPlaneEquation, vPoints[0], vPoints[1], vPoints[2]);
// Calculate projection matrix to draw shadow on the ground
m3dMakePlanarShadowMatrix(mShadowMatrix, vPlaneEquation, fLightPos);
// Mostly use material tracking
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
glMateriali(GL_FRONT, GL_SHININESS, 128);
// Randomly place the sphere inhabitants
for(iSphere = 0; iSphere < NUM_SPHERES; iSphere++)
{
spheres[iSphere].SetOrigin((float)((rand() % 400) - 200) * 0.1f, 0.0f,
(float)((rand() % 400) - 200) * 0.1f);
}
glEnable(GL_MULTISAMPLE); // This is actually on by default
}
// Called to draw scene
void RenderScene(void)
{
M3DMatrix44f mCubeTransform;
M3DVector4f pPlane;
// 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, mCubeTransform);
glutSolidCube(50.0f);
glPopMatrix();
// Disable lighting, we'll just draw the shadow as black
glDisable(GL_LIGHTING);
glPushMatrix();
m3dGetPlaneEquation(pPlane, ground[0], ground[1], ground[2]);
m3dMakePlanarShadowMatrix(mCubeTransform, pPlane, vLightPos);
//MakeShadowMatrix(ground, lightpos, cubeXform);
glMultMatrixf(mCubeTransform);
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, mCubeTransform);
// 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();
m3dGetPlaneEquation(pPlane, ground[0], ground[1], ground[2]);
m3dMakePlanarShadowMatrix(mCubeTransform, pPlane, vLightPos);
glMultMatrixf(mCubeTransform);
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();
}
///////////////////////////////////////////////////////////////////////////////
// Setup. Create font/bitmaps, load textures, create display lists
void SetupRC(HDC hDC)
{
M3DVector3f vPoints[3] = {{ 0.0f, -0.4f, 0.0f },
{ 10.0f, -0.4f, 0.0f },
{ 5.0f, -0.4f, -5.0f }
};
int iSphere;
int i;
// Setup the Font characteristics
HFONT hFont;
LOGFONT logfont;
logfont.lfHeight = -20;
logfont.lfWidth = 0;
logfont.lfEscapement = 0;
logfont.lfOrientation = 0;
logfont.lfWeight = FW_BOLD;
logfont.lfItalic = FALSE;
logfont.lfUnderline = FALSE;
logfont.lfStrikeOut = FALSE;
logfont.lfCharSet = ANSI_CHARSET;
logfont.lfOutPrecision = OUT_DEFAULT_PRECIS;
logfont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
logfont.lfQuality = DEFAULT_QUALITY;
logfont.lfPitchAndFamily = DEFAULT_PITCH;
strcpy(logfont.lfFaceName,"Arial");
// Create the font and display list
hFont = CreateFontIndirect(&logfont);
SelectObject (hDC, hFont);
//Create display lists for glyphs 0 through 128
nFontList = glGenLists(128);
wglUseFontBitmaps(hDC, 0, 128, nFontList);
DeleteObject(hFont); // Don't need original font anymore
// Grayish background
glClearColor(fLowLight[0], fLowLight[1], fLowLight[2], fLowLight[3]);
// Clear stencil buffer with zero, increment by one whenever anybody
// draws into it. When stencil function is enabled, only write where
// stencil value is zero. This prevents the transparent shadow from drawing
// over itself
glStencilOp(GL_INCR, GL_INCR, GL_INCR);
glClearStencil(0);
glStencilFunc(GL_EQUAL, 0x0, 0x01);
// Cull backs of polygons
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
// Setup light parameters
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, fNoLight);
glLightfv(GL_LIGHT0, GL_AMBIENT, fLowLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, fBrightLight);
glLightfv(GL_LIGHT0, GL_SPECULAR, fBrightLight);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
// Calculate shadow matrix
M3DVector4f pPlane;
m3dGetPlaneEquation(pPlane, vPoints[0], vPoints[1], vPoints[2]);
m3dMakePlanarShadowMatrix(mShadowMatrix, pPlane, fLightPos);
// Mostly use material tracking
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
glMateriali(GL_FRONT, GL_SHININESS, 128);
// Randomly place the sphere inhabitants
for(iSphere = 0; iSphere < NUM_SPHERES; iSphere++)
{
// Pick a random location between -20 and 20 at .1 increments
spheres[iSphere].SetOrigin((float)((rand() % 400) - 200) * 0.1f,
0.0f,
(float)((rand() % 400) - 200) * 0.1f);
}
// Set up texture maps
glEnable(GL_TEXTURE_2D);
glGenTextures(NUM_TEXTURES, textureObjects);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
// Load teach texture
for(i = 0; i < NUM_TEXTURES; i++)
{
GLbyte *pBytes;
GLint iWidth, iHeight, iComponents;
GLenum eFormat;
glBindTexture(GL_TEXTURE_2D, textureObjects[i]);
// Load this texture map
pBytes = gltLoadTGA(szTextureFiles[i], &iWidth, &iHeight, &iComponents, &eFormat);
gluBuild2DMipmaps(GL_TEXTURE_2D, iComponents, iWidth, iHeight, eFormat, GL_UNSIGNED_BYTE, pBytes);
free(pBytes);
// Trilinear mipmapping
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
// Get window position function pointer if it exists
glWindowPos2i = (PFNGLWINDOWPOS2IPROC)wglGetProcAddress("glWindowPos2i");
// Get swap interval function pointer if it exists
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
if(wglSwapIntervalEXT != NULL && startupOptions.bVerticalSync == TRUE)
wglSwapIntervalEXT(1);
// If multisampling was available and was selected, enable
if(startupOptions.bFSAA == TRUE && startupOptions.nPixelFormatMS != 0)
glEnable(GL_MULTISAMPLE_ARB);
// If sepearate specular color is available, make torus shiney
if(gltIsExtSupported("GL_EXT_separate_specular_color"))
glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
// Initialize the timers
QueryPerformanceFrequency(&CounterFrequency);
QueryPerformanceCounter(&FPSCount);
CameraTimer = FPSCount;
// Build display lists for the torus and spheres
// (You could do one for the ground as well)
lTorusList = glGenLists(2);
lSphereList = lTorusList + 1;
glNewList(lTorusList, GL_COMPILE);
gltDrawTorus(0.35f, 0.15f, 61, 37);
glEndList();
glNewList(lSphereList, GL_COMPILE);
gltDrawSphere(0.3f, 31, 16);
glEndList();
}
//////////////////////////////////////////////////////////////////
// This function does any needed initialization on the rendering
// context.
void SetupRC()
{
M3DVector3f vPoints[3] = {{ 0.0f, -0.4f, 0.0f },
{ 10.0f, -0.4f, 0.0f },
{ 5.0f, -0.4f, -5.0f }};
int iSphere;
int i;
// Grayish background
glClearColor(fLowLight[0], fLowLight[1], fLowLight[2], fLowLight[3]);
// Clear stencil buffer with zero, increment by one whenever anybody
// draws into it. When stencil function is enabled, only write where
// stencil value is zero. This prevents the transparent shadow from drawing
// over itself
glStencilOp(GL_INCR, GL_INCR, GL_INCR);
glClearStencil(0);
glStencilFunc(GL_EQUAL, 0x0, 0x01);
// Cull backs of polygons
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glEnable(GL_MULTISAMPLE_ARB);
// Setup light parameters
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, fNoLight);
glLightfv(GL_LIGHT0, GL_AMBIENT, fLowLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, fBrightLight);
glLightfv(GL_LIGHT0, GL_SPECULAR, fBrightLight);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
// Calculate shadow matrix
M3DVector4f pPlane;
m3dGetPlaneEquation(pPlane, vPoints[0], vPoints[1], vPoints[2]);
m3dMakePlanarShadowMatrix(mShadowMatrix, pPlane, fLightPos);
// Mostly use material tracking
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
glMaterialfv(GL_FRONT, GL_SPECULAR, fBrightLight);
glMateriali(GL_FRONT, GL_SHININESS, 128);
// Randomly place the sphere inhabitants
for(iSphere = 0; iSphere < NUM_SPHERES; iSphere++)
{
// Pick a random location between -20 and 20 at .1 increments
spheres[iSphere].SetOrigin(((float)((rand() % 400) - 200) * 0.1f), 0.0, (float)((rand() % 400) - 200) * 0.1f);
}
// Set up texture maps
glEnable(GL_TEXTURE_2D);
glGenTextures(NUM_TEXTURES, textureObjects);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
for(i = 0; i < NUM_TEXTURES; i++)
{
GLbyte *pBytes;
GLint iWidth, iHeight, iComponents;
GLenum eFormat;
glBindTexture(GL_TEXTURE_2D, textureObjects[i]);
// Load this texture map
pBytes = gltLoadTGA(szTextureFiles[i], &iWidth, &iHeight, &iComponents, &eFormat);
gluBuild2DMipmaps(GL_TEXTURE_2D, iComponents, iWidth, iHeight, eFormat, GL_UNSIGNED_BYTE, pBytes);
free(pBytes);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
}
