//Called for initiation
void Init(void)
{
//Check for and set up extensions
// if( !SetUpARB_multitexture() || !SetUpARB_texture_cube_map() ||
// !SetUpARB_texture_env_combine() || !SetUpARB_texture_env_dot3())
// {
// printf("Required Extension Unsupported\n");
// exit(0);
// }
//Load identity modelview
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//Shading states
glShadeModel(GL_SMOOTH);
glClearColor(0.2f, 0.4f, 0.2f, 0.0f);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
//Depth states
glClearDepth(1.0f);
glDepthFunc(GL_LEQUAL);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
//Load normal map
IMAGE normalMapImage;
std::stringstream fn;
fn << texture_path;
fn << "NormalMap.bmp";
normalMapImage.Load(fn.str().c_str());
// normalMapImage.Load("NormalMap.bmp");
normalMapImage.ExpandPalette();
//Convert normal map to texture
glGenTextures(1, &normalMap);
glBindTexture(GL_TEXTURE_2D, normalMap);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, normalMapImage.width, normalMapImage.height,
0, normalMapImage.format, GL_UNSIGNED_BYTE, normalMapImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Load decal image
IMAGE decalImage;
std::stringstream fn_decal;
fn_decal << texture_path;
fn_decal << "Decal.bmp";
decalImage.Load(fn_decal.str().c_str());
// decalImage.Load("Decal.bmp");
decalImage.ExpandPalette();
//Convert decal image to texture
glGenTextures(1, &decalTexture);
glBindTexture(GL_TEXTURE_2D, decalTexture);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, decalImage.width, decalImage.height,
0, decalImage.format, GL_UNSIGNED_BYTE, decalImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Create normalisation cube map
glGenTextures(1, &normalisationCubeMap);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, normalisationCubeMap);
GenerateNormalisationCubeMap();
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
}
//Set up variables
bool DemoInit()
{
SetUpARB_multitexture();
SetUpARB_texture_cube_map();
SetUpEXT_compiled_vertex_array();
SetUpEXT_texture_edge_clamp();
SetUpNV_register_combiners();
SetUpNV_vertex_program();
SetUpNV_texture_shader();
if( !GL_ARB_texture_cube_map || !GL_EXT_compiled_vertex_array ||
!GL_ARB_multitexture || !GL_NV_register_combiners ||
!GL_NV_vertex_program || !GL_EXT_texture_edge_clamp)
return false;
//Get some useful info
int maxTextureUnitsARB;
glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &maxTextureUnitsARB);
int maxGeneralCombinersNV;
glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &maxGeneralCombinersNV);
if( GL_NV_texture_shader &&
maxTextureUnitsARB>=4 &&
maxGeneralCombinersNV>=4)
{
Util::log("Higher Quality bump mapping supported");
paths1And2Supported=true;
currentTechnique=TEXTURE_LOOKUP;
}
else
Util::log("Higher Quality bump mapping unsupported");
//Load Textures
//normal map - put gloss map in alpha
normalMapImage.Load("Normal Map.bmp");
normalMapImage.LoadAlphaTGA("gloss.tga");
glGenTextures(1, &normalMapTexture);
glBindTexture(GL_TEXTURE_2D, normalMapTexture);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, normalMapImage.width, normalMapImage.height,
0, normalMapImage.format, GL_UNSIGNED_BYTE, normalMapImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//decal
decalImage.Load("Decal.bmp");
glGenTextures(1, &decalTexture);
glBindTexture(GL_TEXTURE_2D, decalTexture);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, decalImage.width, decalImage.height,
0, decalImage.format, GL_UNSIGNED_BYTE, decalImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//Create normalisation cube map
glGenTextures(1, &normalisationCubeMap);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, normalisationCubeMap);
GenerateNormalisationCubeMap();
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
if(paths1And2Supported)
{
//Create signed normap map
//Create space for signed data
GLbyte * signedData=new GLbyte[normalMapImage.width*normalMapImage.height*3];
if(!signedData)
{
Util::log("Unable to allocate memory for signed normal map data");
return false;
}
//Convert unsigned to signed RGB data, ignoring alpha
for(unsigned int i=0; i<normalMapImage.width*normalMapImage.height; i++)
{
for(unsigned int j=0; j<3; j++)
{
signedData[i*3+j]=normalMapImage.data[i*4+j]-128;
}
}
glGenTextures(1, &signedNormalMap);
glBindTexture(GL_TEXTURE_2D, signedNormalMap);
glTexImage2D( GL_TEXTURE_2D, 0, GL_SIGNED_RGBA8_NV, normalMapImage.width, normalMapImage.height,
0, GL_RGB, GL_BYTE, signedData);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
if(signedData)
delete [] signedData;
signedData=NULL;
}
//make sure texImage2D is finished with normalMapImage before we change the image
glFinish();
//Flatten the bumps in the normal map
for(unsigned int i=0; i<normalMapImage.width*normalMapImage.height; ++i)
{
normalMapImage.data[i*4]=128;
normalMapImage.data[i*4+1]=128;
normalMapImage.data[i*4+2]=255;
}
//create flat normal map with gloss map in alpha
glGenTextures(1, &flatNormalMap);
glBindTexture(GL_TEXTURE_2D, flatNormalMap);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, normalMapImage.width, normalMapImage.height,
0, normalMapImage.format, GL_UNSIGNED_BYTE, normalMapImage.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
if(paths1And2Supported)
{
//Create signed flat normap map
//Create space for signed data
GLbyte * signedData=new GLbyte[normalMapImage.width*normalMapImage.height*3];
if(!signedData)
{
Util::log("Unable to allocate memory for signed normal map data");
return false;
}
//Convert unsigned to signed RGB data, ignoring alpha
for(unsigned int i=0; i<normalMapImage.width*normalMapImage.height; i++)
{
for(unsigned int j=0; j<3; j++)
{
signedData[i*3+j]=normalMapImage.data[i*4+j]-128;
}
}
glGenTextures(1, &signedFlatNormalMap);
glBindTexture(GL_TEXTURE_2D, signedFlatNormalMap);
glTexImage2D( GL_TEXTURE_2D, 0, GL_SIGNED_RGBA8_NV, normalMapImage.width, normalMapImage.height,
0, GL_RGB, GL_BYTE, signedData);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
if(signedData)
delete [] signedData;
signedData=NULL;
//Create specular ramp texture
unsigned char specularRampValues[256];
for(unsigned int i=0; i<256; i++)
{
double poweredValue=(double)i/255;
//raise to 16th power
poweredValue= poweredValue*poweredValue*poweredValue*poweredValue*
poweredValue*poweredValue*poweredValue*poweredValue*
poweredValue*poweredValue*poweredValue*poweredValue*
poweredValue*poweredValue*poweredValue*poweredValue;
specularRampValues[i] = char(poweredValue*255);
}
glGenTextures(1, &specularRamp);
glBindTexture(GL_TEXTURE_2D, specularRamp);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, 256, 1,
0, GL_LUMINANCE, GL_UNSIGNED_BYTE, specularRampValues);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
//reset timer for start
timer.Reset();
return true;
}
