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Comparing cvsroot/libgender/material.C (file contents):
Revision 1.2 by root, Sun Oct 10 14:18:58 2004 UTC vs.
Revision 1.36 by root, Thu Nov 4 04:49:04 2004 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 () 11material::~material ()
5{ 12{
6} 13}
7 14
8void simple_material::begin () 15GLuint
16texture::load_texture (SDL_Surface * surface, GLfloat * tex2oord)
9{ 17{
10 glMaterialfv (GL_FRONT, GL_DIFFUSE, (GLfloat *)&diffuse); 18 GLuint name;
11 glMaterialfv (GL_FRONT, GL_SPECULAR, (GLfloat *)&specular); 19 SDL_Surface *image;
12 glMaterialfv (GL_FRONT, GL_EMISSION, (GLfloat *)&emission); 20 SDL_Rect area;
13 glMaterialf (GL_FRONT, GL_SHININESS, shininess); 21 Uint32 saved_flags;
22 Uint8 saved_alpha;
23
24 /* Use the surface width and height expanded to powers of 2 */
25 tex2oord[0] = 0.F; /* Min X */
26 tex2oord[1] = 0.F; /* Min Y */
27 tex2oord[2] = 1.F; /* Max X */
28 tex2oord[3] = 1.F; /* Max Y */
29
30 image = SDL_CreateRGBSurface (SDL_SWSURFACE, surface->w, surface->h, 32,
31#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */
32 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000
33#else
34 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF
35#endif
36 );
37
38 if (image == NULL)
39 return 0;
40
41 /* Save the alpha blending attributes */
42 saved_flags = surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK);
43 saved_alpha = surface->format->alpha;
44 if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA)
45 SDL_SetAlpha (surface, 0, 0);
46
47 /* Copy the surface into the GL texture image */
48 area.x = 0;
49 area.y = 0;
50 area.w = surface->w;
51 area.h = surface->h;
52 SDL_BlitSurface (surface, &area, image, &area);
53
54 /* Restore the alpha blending attributes */
55 if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA)
56 SDL_SetAlpha (surface, saved_flags, saved_alpha);
57
58 /* Create an OpenGL texture for the image */
59 glGenTextures (1, &name);
60 glBindTexture (GL_TEXTURE_2D, name);
61 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
62 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
63 glTexParameteri (GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
64 glTexImage2D (GL_TEXTURE_2D,
65 0,
66 GL_RGBA, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels);
67 SDL_FreeSurface (image); /* No longer needed */
68
69 return name;
14} 70}
15 71
16void simple_material::end () 72void material::enable (view &ctx)
73{
74 pass::matmap_t &matmap = ctx.pass_data->matmap;
75
76 pass::matmap_t::iterator i = matmap.find (this);
77 shader::program_object *p;
78
79 if (i == matmap.end ())
80 {
81 shader::program_object po;
82
83 shader::shader_builder::start ();
84 vsh (ctx);
85
86 if (ctx.pass_data->l)
87 ctx.pass_data->l->vsh ();
88
89 po->vsh->compile (shader::shader_builder::stop ());
90
91 shader::shader_builder::start ();
92 shader::compile::fout.frag_color = shader::compile::float4 (1., 1., 0., 1.);
93 fsh (ctx);
94 po->fsh->compile (shader::shader_builder::stop ());
95
96 po->link ();
97
98 matmap.insert (pass::matmap_t::value_type (this, po));
99
100 p = &po;
101 }
102 else
103 p = &i->second;
104
105 (*p)->enable ();
106}
107
108void material::disable (view &ctx)
17{ 109{
18} 110}
19 111
112test_material::test_material ()
113//: tex ("textures/osama.jpg"), texvar (tex.name)
114: tex ("textures/rockwall.jpg"), texvar (tex.name)
115, norm ("textures/rockwall_normal.jpg"), normvar (norm.name)
116{
117}
20 118
119static shader::varying_3f normal, lightvec;
120static shader::varying_2f texcoord;
121
122void test_material::vsh (view &ctx)
123{
124 using namespace shader::compile;
125
126 std_vsh ();
127
128 if (ctx.pass_data->l)
129 {
130 texcoord = xy (vin.tex_coord[0]);
131 normal = normal_matrix * vin.normal;
132 lightvec = xyz (ctx.pass_data->l->lightpos - model_view_matrix * vin.vertex);
133 }
134}
135
136void test_material::fsh (view &ctx)
137{
138 using namespace shader::compile;
139
140 if (ctx.pass_data->l)
141 {
142 temp_3f lc;
143 temp_1f fac;
144
145 lc = (*ctx.pass_data->l)();
146
147 temp_3f rot1, rot2, rot3;
148
149 rot1 = yxz (texture_2d (normvar, texcoord) * 2.F - 1.F);
150 rot2 = float3 (x(rot1), z(rot1), -y(rot1));
151 rot3 = float3 (y(rot1), -x(rot1), z(rot1));
152
153 normal = mat3 (rot1, rot2, rot3) * normal;
154
155 fac = dot (normalize (normal), normalize (lightvec));
156 fac = pow (max (fac, 0.0), 6);
157 xyz (fout.frag_color) = (texture_2d (texvar, texcoord) + 0.2F) * lc * fac;
158 }
159}
160
161void test_material::enable (view &ctx)
162{
163 material::enable (ctx);
164 texvar->enable ();
165 normvar->enable ();
166}
167
168void test_material::disable (view &ctx)
169{
170 normvar->disable ();
171 texvar->disable ();
172 material::disable (ctx);
173}
174
175test_material *testmat;
176

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