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Comparing cvsroot/libgender/material.C (file contents):
Revision 1.4 by root, Sun Oct 10 20:22:33 2004 UTC vs.
Revision 1.64 by root, Mon Jul 18 04:28:40 2005 UTC

1#include <cstdlib>
2#include <cstring>
3
4#include <algorithm>
5
1#include "opengl.h" 6#include "opengl.h"
2#include "material.h" 7#include "material.h"
8#include "view.h"
9#include "util.h"
3 10
4material::~material () 11GLuint
5{
6}
7
8void simple_material::begin ()
9{
10 glMaterialfv (GL_FRONT, GL_DIFFUSE, (GLfloat *)&diffuse);
11 glMaterialfv (GL_FRONT, GL_SPECULAR, (GLfloat *)&specular);
12 glMaterialfv (GL_FRONT, GL_EMISSION, (GLfloat *)&emission);
13 glMaterialf (GL_FRONT, GL_SHININESS, shininess);
14}
15
16void simple_material::end ()
17{
18}
19void osama_material::begin ()
20{
21 cgGLEnableProfile (vsh_profile);
22 cgGLEnableProfile (fsh_profile);
23 cgGLEnableTextureParameter(g_Texture);
24}
25void osama_material::end ()
26{
27 cgGLDisableTextureParameter(g_Texture);
28 // cgGLUnbindProgram (vsh_profile);
29 // cgGLUnbindProgram (fsh_profile);
30 cgGLDisableProfile (vsh_profile);
31 cgGLDisableProfile (fsh_profile);
32}
33
34
35GLuint texture::load_texture (SDL_Surface *surface, GLfloat *texcoord) 12texture::load_texture (SDL_Surface * surface, GLfloat * tex2oord)
36{ 13{
37 GLuint textur; 14 GLuint name;
38 int w, h;
39 SDL_Surface *image; 15 SDL_Surface *image;
40 SDL_Rect area; 16 SDL_Rect area;
41 Uint32 saved_flags; 17 Uint32 saved_flags;
42 Uint8 saved_alpha; 18 Uint8 saved_alpha;
43 19
44 /* Use the surface width and height expanded to powers of 2 */ 20 /* Use the surface width and height expanded to powers of 2 */
45 //w = power_of_two (surface->w);
46 //h = power_of_two (surface->h);
47 w = power_of_two (surface->w);
48 h = power_of_two (surface->h);
49 texcoord[0] = 0.0f; /* Min X */ 21 tex2oord[0] = 0.F; /* Min X */
50 texcoord[1] = 0.0f; /* Min Y */ 22 tex2oord[1] = 0.F; /* Min Y */
51 texcoord[2] = (GLfloat) surface->w / w; /* Max X */ 23 tex2oord[2] = 1.F; /* Max X */
52 texcoord[3] = (GLfloat) surface->h / h; /* Max Y */ 24 tex2oord[3] = 1.F; /* Max Y */
53 25
54 image = SDL_CreateRGBSurface (SDL_SWSURFACE, w, h, 32, 26 image = SDL_CreateRGBSurface (SDL_SWSURFACE, surface->w, surface->h, 32,
55#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ 27#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */
56 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 28 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000
57#else 29#else
58 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF 30 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF
59#endif 31#endif
60 ); 32 );
33
61 if (image == NULL) 34 if (image == NULL)
62 {
63 return 0; 35 return 0;
64 }
65 36
66 /* Save the alpha blending attributes */ 37 /* Save the alpha blending attributes */
67 saved_flags = surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK); 38 saved_flags = surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK);
68 saved_alpha = surface->format->alpha; 39 saved_alpha = surface->format->alpha;
69 if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA) 40 if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA)
70 {
71 SDL_SetAlpha (surface, 0, 0); 41 SDL_SetAlpha (surface, 0, 0);
72 }
73 42
74 /* Copy the surface into the GL texture image */ 43 /* Copy the surface into the GL texture image */
75 area.x = 0; 44 area.x = 0;
76 area.y = 0; 45 area.y = 0;
77 area.w = surface->w; 46 area.w = surface->w;
78 area.h = surface->h; 47 area.h = surface->h;
79 SDL_BlitSurface (surface, &area, image, &area); 48 SDL_BlitSurface (surface, &area, image, &area);
80 49
81 /* Restore the alpha blending attributes */ 50 /* Restore the alpha blending attributes */
82 if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA) 51 if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA)
83 {
84 SDL_SetAlpha (surface, saved_flags, saved_alpha); 52 SDL_SetAlpha (surface, saved_flags, saved_alpha);
85 }
86 53
87 /* Create an OpenGL texture for the image */ 54 /* Create an OpenGL texture for the image */
88 glGenTextures (1, &textur); 55 glGenTextures (1, &name);
89 glBindTexture (GL_TEXTURE_2D, textur); 56 glBindTexture (GL_TEXTURE_2D, name);
90 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 57 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
91 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 58 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
59 glTexParameteri (GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
92 glTexImage2D (GL_TEXTURE_2D, 60 glTexImage2D (GL_TEXTURE_2D, 0,
93 0,
94 GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels); 61 GL_RGBA, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels);
95 SDL_FreeSurface (image); /* No longer needed */ 62 SDL_FreeSurface (image); /* No longer needed */
96 63
97 return textur; 64 return name;
98} 65}
99 66
100 67material::~material ()
101CGcontext cgc; 68{
102void init_shaders () {
103 cgc = cgCreateContext ();
104} 69}
70
71void material::enable (view &ctx)
72{
73 pass_data::matmap_t &matmap = ctx.pass->matmap;
74
75 pass_data::matmap_t::iterator i = matmap.find (this);
76
77 if (i == matmap.end ())
78 {
79 string vsh_src, fsh_src;
80
81 shader::shader_builder::start ();
82
83 if (ctx.pass->l)
84 ctx.pass->l->vsh ();
85
86 vsh (ctx);
87
88 // compute logarithmic depth - see the frustum matrix in view.C
89 {
90 using namespace shader::compile;
91
92 temp_1f lz;
93
94 // TODO: negative z is not calculated in an a very acceptable way
95 lz = z (vout.position);
96 lz = sign (lz) * (log (abs (lz) + exp (1e0)) - 1e0) / log (1e30);
97 z (vout.position) = lz * w (vout.position);
98 }
99
100 vsh_src = shader::shader_builder::stop ();
101
102 shader::shader_builder::start ();
103
104 if (ctx.pass->l)
105 {
106 ctx.pass->l->fsh ();
107 fsh (ctx);
108 }
109 else
110 // many drivers need both vertex and fragment shader, 'caboom!' otherwise
111 shader::compile::fout.frag_color = shader::compile::float4 (0., 0., 0., 0.);
112
113 fsh_src = shader::shader_builder::stop ();
114
115 shader::program_object po = shader::get_program (vsh_src, fsh_src);
116 matmap.insert (pass_data::matmap_t::value_type (this, po));
117
118 po->enable ();
119 }
120 else
121 i->second->enable ();
122
123 if (ctx.pass->l)
124 ctx.pass->l->enable (ctx);
125}
126
127void material::disable (view &ctx)
128{
129}
130
131test_material::test_material ()
132//: tex ("textures/osama.jpg"), texvar (tex.name)
133: tex ("textures/rockwall.jpg"), texvar (tex.name)
134, norm ("textures/rockwall_normal.jpg"), normvar (norm.name)
135{
136}
137
138void mat_timed::enable (view &ctx)
139{
140 material::enable (ctx);
141
142 time->set (timer::now);
143 sh_colour->set (vec3 (255, 0, 0) * (1.F / 255.F));
144}
145
146void mat_timed::disable (view &ctx)
147{
148 material::disable (ctx);
149}
150
151void mat_timed::vsh (view &ctx)
152{
153 using namespace shader::compile;
154 std_vsh ();
155
156 if (ctx.pass->l)
157 f_normal = normal_matrix * vin.normal;
158}
159
160void mat_timed::fsh (view &ctx)
161{
162 using namespace shader::compile;
163
164 if (ctx.pass->l)
165 {
166 temp_1f fac;
167 temp_3f normal;
168
169 normal = f_normal + 0.3 * pow (sin (f_normal * 3.14159 + time), 3);
170
171 fac = dot (normalize (normal), normalize (ctx.pass->l->sh_lightvec));
172
173 xyz (fout.frag_color) = fac * float3 (0.1,0.5,1);//ctx.pass->l->sh_colour * sh_colour * fac;
174 }
175}
176
177void mat_gouraud_shaded::enable (view &ctx)
178{
179 material::enable (ctx);
180
181 sh_colour->set (vec3 (c.r, c.g, c.b) * (1.F / 255.F));
182}
183
184void mat_gouraud_shaded::disable (view &ctx)
185{
186 material::disable (ctx);
187}
188
189void mat_gouraud_shaded::vsh (view &ctx)
190{
191 using namespace shader::compile;
192 std_vsh ();
193
194 if (ctx.pass->l)
195 f_normal = normal_matrix * vin.normal;
196}
197
198void mat_gouraud_shaded::fsh (view &ctx)
199{
200 using namespace shader::compile;
201
202 if (ctx.pass->l)
203 {
204 temp_1f fac;
205
206 fac = dot (normalize (f_normal), normalize (ctx.pass->l->sh_lightvec));
207
208 xyz (fout.frag_color) = ctx.pass->l->sh_colour * sh_colour * fac;
209 }
210}
211
212static shader::varying_3f f_normal;
213
214void mat_debug::enable (view &ctx)
215{
216 material::enable (ctx);
217
218 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
219 glEnable (GL_BLEND);
220 glDepthMask (1);
221}
222
223void mat_debug::disable (view &ctx)
224{
225 material::disable (ctx);
226
227 glDisable (GL_BLEND);
228 glDepthMask (0);
229}
230
231void mat_debug::vsh (view &ctx)
232{
233 using namespace shader::compile;
234 std_vsh ();
235
236 if (ctx.pass->l)
237 f_normal = normal_matrix * vin.normal;
238}
239
240void mat_debug::fsh (view &ctx)
241{
242 using namespace shader::compile;
243
244 if (ctx.pass->l)
245 {
246 temp_1f fac;
247
248 fac = dot (normalize (f_normal), normalize (ctx.pass->l->sh_lightvec));
249
250 xyz (fout.frag_color) = float3 (1.,0.,0.);
251 w (fout.frag_color) = 0.1;
252 }
253}
254
255static shader::varying_2f texcoord;
256static shader::varying_3f normal;
257
258void test_material::vsh (view &ctx)
259{
260 using namespace shader::compile;
261
262 std_vsh ();
263
264 if (ctx.pass->l)
265 {
266 texcoord = xy (vin.tex_coord[0]);
267 normal = normal_matrix * vin.normal;
268 }
269}
270
271void test_material::fsh (view &ctx)
272{
273 using namespace shader::compile;
274
275 if (ctx.pass->l)
276 {
277 temp_3f lc;
278 temp_1f fac;
279
280 temp_3f rot1, rot2, rot3;
281
282 yxz (rot1) = (texture_2d (normvar, texcoord) * 2.F - 1.F);
283
284 //rot1 = normal_matrix * rot1;
285
286 rot2 = float3 (x(rot1), z(rot1), -y(rot1));
287 rot3 = float3 (y(rot1), -x(rot1), z(rot1));
288
289 normal = mat3 (rot1, rot2, rot3) * normal;
290
291 fac = dot (normalize (normal), normalize (ctx.pass->l->sh_lightvec));
292 fac = max (pow (max (fac, 0.0), 6), 0.3);
293 xyz (fout.frag_color) = (texture_2d (texvar, texcoord) + 0.2F) * fac
294 * ctx.pass->l->sh_colour;
295 //xyz (fout.frag_color) = lc * fac;
296 }
297}
298
299void test_material::enable (view &ctx)
300{
301 material::enable (ctx);
302 texvar->enable ();
303 normvar->enable ();
304}
305
306void test_material::disable (view &ctx)
307{
308 normvar->disable ();
309 texvar->disable ();
310 material::disable (ctx);
311}
312
313test_material *testmat;
314mat_gouraud_shaded *testmat2;
315mat_timed *testmat3;
316mat_debug *debugmat;
317

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