| 1 |
#ifndef MATERIAL_H |
| 2 |
#define MATERIAL_H |
| 3 |
|
| 4 |
#include "util.h" |
| 5 |
|
| 6 |
|
| 7 |
struct texture_execption |
| 8 |
{ |
| 9 |
texture_execption (string s) : msg(s) { } |
| 10 |
string msg; |
| 11 |
}; |
| 12 |
|
| 13 |
inline int power_of_two (int input) |
| 14 |
{ |
| 15 |
int value = 1; |
| 16 |
|
| 17 |
while (value < input) |
| 18 |
{ |
| 19 |
value <<= 1; |
| 20 |
} |
| 21 |
return value; |
| 22 |
} |
| 23 |
|
| 24 |
|
| 25 |
|
| 26 |
struct material |
| 27 |
{ |
| 28 |
virtual void begin () = 0; |
| 29 |
virtual void end () = 0; |
| 30 |
virtual ~material (); |
| 31 |
}; |
| 32 |
|
| 33 |
struct simple_material : material |
| 34 |
{ |
| 35 |
colour diffuse, specular, emission; |
| 36 |
GLfloat shininess; |
| 37 |
|
| 38 |
void begin (); |
| 39 |
void end (); |
| 40 |
|
| 41 |
simple_material () |
| 42 |
: diffuse(1, 0, 1, 1) |
| 43 |
, specular(1, 0, 1, 1) |
| 44 |
, emission(1, 0, 1, 1) |
| 45 |
, shininess(1.) |
| 46 |
{ |
| 47 |
} |
| 48 |
}; |
| 49 |
|
| 50 |
struct texture |
| 51 |
{ |
| 52 |
SDL_Surface *image; |
| 53 |
GLuint texture_pxls; |
| 54 |
GLfloat texcoord[4]; |
| 55 |
|
| 56 |
GLuint load_texture (SDL_Surface *surface, GLfloat *texcoord); |
| 57 |
|
| 58 |
texture(const char *f) |
| 59 |
{ |
| 60 |
image = IMG_Load (f); |
| 61 |
|
| 62 |
if (!image) |
| 63 |
throw (texture_execption ("Couldn't load " + (string) f + ": " + (string) IMG_GetError ())); |
| 64 |
|
| 65 |
texture_pxls = load_texture (image, (GLfloat*)&texcoord); |
| 66 |
if (texture_pxls == 0) |
| 67 |
throw (texture_execption ("Couldn't make GL Texture, failed to create new RGB SWSurface")); |
| 68 |
} |
| 69 |
}; |
| 70 |
|
| 71 |
extern CGcontext cgc; |
| 72 |
|
| 73 |
struct shader |
| 74 |
{ |
| 75 |
CGprogram vsh, fsh; |
| 76 |
CGparameter lightpos; |
| 77 |
// mv, mvp |
| 78 |
CGprofile vsh_profile, fsh_profile; |
| 79 |
CGparameter g_Texture; // the texture parameter |
| 80 |
|
| 81 |
void check_cg_error (void) |
| 82 |
{ |
| 83 |
CGerror err = cgGetError (); |
| 84 |
|
| 85 |
if (err != CG_NO_ERROR) |
| 86 |
{ |
| 87 |
printf("CG error: %s\n", cgGetErrorString (err)); |
| 88 |
exit(1); |
| 89 |
} |
| 90 |
} |
| 91 |
shader (const char *vshp, const char *fshp) |
| 92 |
{ |
| 93 |
vsh_profile = CG_PROFILE_ARBVP1; |
| 94 |
//if (cgGLIsProfileSupported (CG_PROFILE_VP30)) vsh_profile = CG_PROFILE_VP30; |
| 95 |
//if (cgGLIsProfileSupported (CG_PROFILE_VP40)) vsh_profile = CG_PROFILE_VP40; |
| 96 |
fsh_profile = CG_PROFILE_ARBFP1; |
| 97 |
//if (cgGLIsProfileSupported (CG_PROFILE_FP30)) fsh_profile = CG_PROFILE_FP30; |
| 98 |
//if (cgGLIsProfileSupported (CG_PROFILE_FP40)) fsh_profile = CG_PROFILE_FP40; |
| 99 |
|
| 100 |
vsh = cgCreateProgramFromFile (cgc, CG_SOURCE, vshp, vsh_profile, 0, 0); |
| 101 |
check_cg_error (); |
| 102 |
cgGLLoadProgram (vsh); |
| 103 |
check_cg_error (); |
| 104 |
|
| 105 |
fsh = cgCreateProgramFromFile (cgc, CG_SOURCE, fshp, fsh_profile, 0, 0); |
| 106 |
check_cg_error (); |
| 107 |
cgGLLoadProgram (fsh); |
| 108 |
check_cg_error (); |
| 109 |
|
| 110 |
cgGLBindProgram (vsh); |
| 111 |
cgGLBindProgram (fsh); |
| 112 |
|
| 113 |
// mv = cgGetNamedParameter (vsh, "WorldProj"); |
| 114 |
// mvp = cgGetNamedParameter (vsh, "WorldViewProj"); |
| 115 |
//lightpos = cgGetNamedParameter (vsh, "LightPos"); |
| 116 |
//cgGLSetParameter4f (lightpos, 10, 10, 0, 1); //camera.p.x, camera.p.y, camera.p.z, 1); |
| 117 |
|
| 118 |
check_cg_error (); |
| 119 |
} |
| 120 |
}; |
| 121 |
|
| 122 |
struct osama_material : material, texture, shader { |
| 123 |
osama_material () |
| 124 |
: shader ("vsh.cg", "fsh.cg"), texture ("textures/osama.jpg") |
| 125 |
{ |
| 126 |
g_Texture = cgGetNamedParameter(fsh, "Texture"); // the texture cg-warper ;) |
| 127 |
cgGLSetTextureParameter(g_Texture, texture_pxls); // Bind the texture number 999 to g_Texture |
| 128 |
} |
| 129 |
|
| 130 |
void begin (); |
| 131 |
void end (); |
| 132 |
|
| 133 |
}; |
| 134 |
|
| 135 |
void init_shaders (); |
| 136 |
#endif |
| 137 |
|
| 138 |
|
