8ba6f9f48f9ff2165e5f94f6e76841e86d29ec15
[xonotic/darkplaces.git] / gl_models.c
1
2 #include "quakedef.h"
3 #include "r_shadow.h"
4
5 void GL_Models_Init(void)
6 {
7 }
8
9 aliaslayer_t r_aliasnoskinlayers[2] = {{ALIASLAYER_DIFFUSE, NULL, NULL}, {ALIASLAYER_FOG | ALIASLAYER_FORCEDRAW_IF_FIRSTPASS, NULL, NULL}};
10 aliasskin_t r_aliasnoskin = {0, 2, r_aliasnoskinlayers};
11 aliasskin_t *R_FetchAliasSkin(const entity_render_t *ent, const aliasmesh_t *mesh)
12 {
13         model_t *model = ent->model;
14         if (model->numskins)
15         {
16                 int s = ent->skinnum;
17                 if ((unsigned int)s >= (unsigned int)model->numskins)
18                         s = 0;
19                 if (model->skinscenes[s].framecount > 1)
20                         s = model->skinscenes[s].firstframe + (int) (cl.time * model->skinscenes[s].framerate) % model->skinscenes[s].framecount;
21                 else
22                         s = model->skinscenes[s].firstframe;
23                 if (s >= mesh->num_skins)
24                         s = 0;
25                 return mesh->data_skins + s;
26         }
27         else
28         {
29                 r_aliasnoskinlayers[0].texture = r_notexture;
30                 return &r_aliasnoskin;
31         }
32 }
33
34 void R_DrawAliasModelCallback (const void *calldata1, int calldata2)
35 {
36         int c, fullbright, layernum, firstpass;
37         float tint[3], fog, ifog, colorscale, ambientcolor4f[4], diffusecolor[3], diffusenormal[3];
38         float *vertex3f, *normal3f;
39         vec3_t diff;
40         qbyte *bcolor;
41         rmeshstate_t m;
42         const entity_render_t *ent = calldata1;
43         aliasmesh_t *mesh = ent->model->alias.aliasdata_meshes + calldata2;
44         aliaslayer_t *layer;
45         aliasskin_t *skin;
46
47         R_Mesh_Matrix(&ent->matrix);
48
49         fog = 0;
50         if (fogenabled)
51         {
52                 VectorSubtract(ent->origin, r_vieworigin, diff);
53                 fog = DotProduct(diff,diff);
54                 if (fog < 0.01f)
55                         fog = 0.01f;
56                 fog = exp(fogdensity/fog);
57                 if (fog > 1)
58                         fog = 1;
59                 if (fog < 0.01f)
60                         fog = 0;
61                 // fog method: darken, additive fog
62                 // 1. render model as normal, scaled by inverse of fog alpha (darkens it)
63                 // 2. render fog as additive
64         }
65         ifog = 1 - fog;
66
67         firstpass = true;
68         skin = R_FetchAliasSkin(ent, mesh);
69
70         if (ent->frameblend[0].frame == 0 && ent->frameblend[0].lerp == 1)
71         {
72                 vertex3f = mesh->data_basevertex3f;
73                 normal3f = mesh->data_basenormal3f;
74         }
75         else
76         {
77                 vertex3f = varray_vertex3f;
78                 Mod_Alias_GetMesh_Vertex3f(ent->model, ent->frameblend, mesh, vertex3f);
79                 normal3f = NULL;
80         }
81         for (layernum = 0, layer = skin->data_layers;layernum < skin->num_layers;layernum++, layer++)
82         {
83                 if (!(layer->flags & ALIASLAYER_FORCEDRAW_IF_FIRSTPASS) || !firstpass)
84                 {
85                         if (((layer->flags & ALIASLAYER_NODRAW_IF_NOTCOLORMAPPED) && ent->colormap < 0)
86                          || ((layer->flags & ALIASLAYER_NODRAW_IF_COLORMAPPED) && ent->colormap >= 0)
87                          || ((layer->flags & ALIASLAYER_FOG) && !fogenabled)
88                          ||  (layer->flags & ALIASLAYER_SPECULAR)
89                          || ((layer->flags & ALIASLAYER_DIFFUSE) && (r_shadow_realtime_world.integer && r_shadow_realtime_world_lightmaps.value <= 0 && r_ambient.integer <= 0 && r_fullbright.integer == 0 && !(ent->effects & EF_FULLBRIGHT))))
90                                 continue;
91                 }
92                 if (!firstpass || (ent->effects & EF_ADDITIVE))
93                 {
94                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
95                         GL_DepthMask(false);
96                 }
97                 else if ((skin->flags & ALIASSKIN_TRANSPARENT) || ent->alpha != 1.0)
98                 {
99                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
100                         GL_DepthMask(false);
101                 }
102                 else
103                 {
104                         GL_BlendFunc(GL_ONE, GL_ZERO);
105                         GL_DepthMask(true);
106                 }
107                 GL_DepthTest(true);
108                 firstpass = false;
109                 colorscale = 1.0f;
110
111                 memset(&m, 0, sizeof(m));
112                 if (layer->texture != NULL)
113                 {
114                         m.tex[0] = R_GetTexture(layer->texture);
115                         m.pointer_texcoord[0] = mesh->data_texcoord2f;
116                         if (gl_combine.integer && layer->flags & (ALIASLAYER_DIFFUSE | ALIASLAYER_SPECULAR))
117                         {
118                                 colorscale *= 0.25f;
119                                 m.texrgbscale[0] = 4;
120                         }
121                 }
122                 m.pointer_vertex = vertex3f;
123
124                 c_alias_polys += mesh->num_triangles;
125                 if (layer->flags & ALIASLAYER_FOG)
126                 {
127                         colorscale *= fog;
128                         GL_Color(fogcolor[0] * colorscale, fogcolor[1] * colorscale, fogcolor[2] * colorscale, ent->alpha);
129                 }
130                 else
131                 {
132                         fullbright = !(layer->flags & ALIASLAYER_DIFFUSE) || r_fullbright.integer || (ent->effects & EF_FULLBRIGHT);
133                         if (layer->flags & (ALIASLAYER_COLORMAP_PANTS | ALIASLAYER_COLORMAP_SHIRT))
134                         {
135                                 // 128-224 are backwards ranges
136                                 if (layer->flags & ALIASLAYER_COLORMAP_PANTS)
137                                         c = (ent->colormap & 0xF) << 4;
138                                 else //if (layer->flags & ALIASLAYER_COLORMAP_SHIRT)
139                                         c = (ent->colormap & 0xF0);
140                                 c += (c >= 128 && c < 224) ? 4 : 12;
141                                 bcolor = (qbyte *) (&palette_complete[c]);
142                                 fullbright = fullbright || c >= 224;
143                                 VectorScale(bcolor, (1.0f / 255.0f), tint);
144                         }
145                         else
146                                 tint[0] = tint[1] = tint[2] = 1;
147                         if (r_shadow_realtime_world.integer && !fullbright)
148                                 VectorScale(tint, r_shadow_realtime_world_lightmaps.value, tint);
149                         colorscale *= ifog;
150                         if (fullbright)
151                                 GL_Color(tint[0] * colorscale, tint[1] * colorscale, tint[2] * colorscale, ent->alpha);
152                         else
153                         {
154                                 if (R_LightModel(ambientcolor4f, diffusecolor, diffusenormal, ent, tint[0] * colorscale, tint[1] * colorscale, tint[2] * colorscale, ent->alpha, false))
155                                 {
156                                         m.pointer_color = varray_color4f;
157                                         if (normal3f == NULL)
158                                         {
159                                                 normal3f = varray_normal3f;
160                                                 Mod_BuildNormals(mesh->num_vertices, mesh->num_triangles, vertex3f, mesh->data_element3i, normal3f);
161                                         }
162                                         R_LightModel_CalcVertexColors(ambientcolor4f, diffusecolor, diffusenormal, mesh->num_vertices, vertex3f, normal3f, varray_color4f);
163                                 }
164                                 else
165                                         GL_Color(ambientcolor4f[0], ambientcolor4f[1], ambientcolor4f[2], ambientcolor4f[3]);
166                         }
167                 }
168                 R_Mesh_State(&m);
169                 GL_LockArrays(0, mesh->num_vertices);
170                 R_Mesh_Draw(mesh->num_vertices, mesh->num_triangles, mesh->data_element3i);
171                 GL_LockArrays(0, 0);
172         }
173 }
174
175 void R_Model_Alias_Draw(entity_render_t *ent)
176 {
177         int meshnum;
178         aliasmesh_t *mesh;
179         if (ent->alpha < (1.0f / 64.0f))
180                 return; // basically completely transparent
181
182         c_models++;
183
184         for (meshnum = 0, mesh = ent->model->alias.aliasdata_meshes;meshnum < ent->model->alias.aliasnum_meshes;meshnum++, mesh++)
185         {
186                 if (ent->effects & EF_ADDITIVE || ent->alpha != 1.0 || R_FetchAliasSkin(ent, mesh)->flags & ALIASSKIN_TRANSPARENT)
187                         R_MeshQueue_AddTransparent(ent->origin, R_DrawAliasModelCallback, ent, meshnum);
188                 else
189                         R_DrawAliasModelCallback(ent, meshnum);
190         }
191 }
192
193 void R_Model_Alias_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius)
194 {
195         int meshnum;
196         aliasmesh_t *mesh;
197         aliasskin_t *skin;
198         float projectdistance, *vertex3f;
199         if (ent->effects & EF_ADDITIVE || ent->alpha < 1)
200                 return;
201         projectdistance = lightradius + ent->model->radius;// - sqrt(DotProduct(relativelightorigin, relativelightorigin));
202         if (projectdistance > 0.1)
203         {
204                 R_Mesh_Matrix(&ent->matrix);
205                 for (meshnum = 0, mesh = ent->model->alias.aliasdata_meshes;meshnum < ent->model->alias.aliasnum_meshes;meshnum++, mesh++)
206                 {
207                         skin = R_FetchAliasSkin(ent, mesh);
208                         if (skin->flags & ALIASSKIN_TRANSPARENT)
209                                 continue;
210                         if (ent->frameblend[0].frame == 0 && ent->frameblend[0].lerp == 1)
211                                 vertex3f = mesh->data_basevertex3f;
212                         else
213                         {
214                                 vertex3f = varray_vertex3f;
215                                 Mod_Alias_GetMesh_Vertex3f(ent->model, ent->frameblend, mesh, vertex3f);
216                         }
217                         R_Shadow_VolumeFromSphere(mesh->num_vertices, mesh->num_triangles, vertex3f, mesh->data_element3i, mesh->data_neighbor3i, relativelightorigin, projectdistance, lightradius);
218                 }
219         }
220 }
221
222 void R_Model_Alias_DrawLight(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativeeyeorigin, float lightradius, float *lightcolor, const matrix4x4_t *matrix_modeltolight, const matrix4x4_t *matrix_modeltoattenuationxyz, const matrix4x4_t *matrix_modeltoattenuationz, rtexture_t *lightcubemap)
223 {
224         int c, meshnum, layernum;
225         float fog, ifog, lightcolor2[3];
226         float *vertex3f, *svector3f, *tvector3f, *normal3f;
227         vec3_t diff;
228         qbyte *bcolor;
229         aliasmesh_t *mesh;
230         aliaslayer_t *layer;
231         aliasskin_t *skin;
232
233         if (ent->effects & (EF_ADDITIVE | EF_FULLBRIGHT) || ent->alpha < 1)
234                 return;
235
236         R_Mesh_Matrix(&ent->matrix);
237
238         fog = 0;
239         if (fogenabled)
240         {
241                 VectorSubtract(ent->origin, r_vieworigin, diff);
242                 fog = DotProduct(diff,diff);
243                 if (fog < 0.01f)
244                         fog = 0.01f;
245                 fog = exp(fogdensity/fog);
246                 if (fog > 1)
247                         fog = 1;
248                 if (fog < 0.01f)
249                         fog = 0;
250                 // fog method: darken, additive fog
251                 // 1. render model as normal, scaled by inverse of fog alpha (darkens it)
252                 // 2. render fog as additive
253         }
254         ifog = 1 - fog;
255
256         for (meshnum = 0, mesh = ent->model->alias.aliasdata_meshes;meshnum < ent->model->alias.aliasnum_meshes;meshnum++, mesh++)
257         {
258                 skin = R_FetchAliasSkin(ent, mesh);
259                 if (skin->flags & ALIASSKIN_TRANSPARENT)
260                         continue;
261                 if (ent->frameblend[0].frame == 0 && ent->frameblend[0].lerp == 1)
262                 {
263                         vertex3f = mesh->data_basevertex3f;
264                         svector3f = mesh->data_basesvector3f;
265                         tvector3f = mesh->data_basetvector3f;
266                         normal3f = mesh->data_basenormal3f;
267                 }
268                 else
269                 {
270                         vertex3f = varray_vertex3f;
271                         svector3f = varray_svector3f;
272                         tvector3f = varray_tvector3f;
273                         normal3f = varray_normal3f;
274                         Mod_Alias_GetMesh_Vertex3f(ent->model, ent->frameblend, mesh, vertex3f);
275                         Mod_BuildTextureVectorsAndNormals(mesh->num_vertices, mesh->num_triangles, vertex3f, mesh->data_texcoord2f, mesh->data_element3i, svector3f, tvector3f, normal3f);
276                 }
277                 for (layernum = 0, layer = skin->data_layers;layernum < skin->num_layers;layernum++, layer++)
278                 {
279                         if (!(layer->flags & (ALIASLAYER_DIFFUSE | ALIASLAYER_SPECULAR))
280                          || ((layer->flags & ALIASLAYER_NODRAW_IF_NOTCOLORMAPPED) && ent->colormap < 0)
281                          || ((layer->flags & ALIASLAYER_NODRAW_IF_COLORMAPPED) && ent->colormap >= 0))
282                                 continue;
283                         lightcolor2[0] = lightcolor[0] * ifog;
284                         lightcolor2[1] = lightcolor[1] * ifog;
285                         lightcolor2[2] = lightcolor[2] * ifog;
286                         if (layer->flags & ALIASLAYER_SPECULAR)
287                         {
288                                 c_alias_polys += mesh->num_triangles;
289                                 R_Shadow_RenderLighting(mesh->num_vertices, mesh->num_triangles, mesh->data_element3i, vertex3f, svector3f, tvector3f, normal3f, mesh->data_texcoord2f, relativelightorigin, relativeeyeorigin, lightcolor2, matrix_modeltolight, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, layer->texture, layer->nmap, layer->texture, lightcubemap, LIGHTING_SPECULAR);
290                         }
291                         else if (layer->flags & ALIASLAYER_DIFFUSE)
292                         {
293                                 if (layer->flags & ALIASLAYER_COLORMAP_PANTS)
294                                 {
295                                         // 128-224 are backwards ranges
296                                         c = (ent->colormap & 0xF) << 4;c += (c >= 128 && c < 224) ? 4 : 12;
297                                         // fullbright passes were already taken care of, so skip them in realtime lighting passes
298                                         if (c >= 224)
299                                                 continue;
300                                         bcolor = (qbyte *) (&palette_complete[c]);
301                                         lightcolor2[0] *= bcolor[0] * (1.0f / 255.0f);
302                                         lightcolor2[1] *= bcolor[1] * (1.0f / 255.0f);
303                                         lightcolor2[2] *= bcolor[2] * (1.0f / 255.0f);
304                                 }
305                                 else if (layer->flags & ALIASLAYER_COLORMAP_SHIRT)
306                                 {
307                                         // 128-224 are backwards ranges
308                                         c = (ent->colormap & 0xF0);c += (c >= 128 && c < 224) ? 4 : 12;
309                                         // fullbright passes were already taken care of, so skip them in realtime lighting passes
310                                         if (c >= 224)
311                                                 continue;
312                                         bcolor = (qbyte *) (&palette_complete[c]);
313                                         lightcolor2[0] *= bcolor[0] * (1.0f / 255.0f);
314                                         lightcolor2[1] *= bcolor[1] * (1.0f / 255.0f);
315                                         lightcolor2[2] *= bcolor[2] * (1.0f / 255.0f);
316                                 }
317                                 c_alias_polys += mesh->num_triangles;
318                                 R_Shadow_RenderLighting(mesh->num_vertices, mesh->num_triangles, mesh->data_element3i, vertex3f, svector3f, tvector3f, normal3f, mesh->data_texcoord2f, relativelightorigin, relativeeyeorigin, lightcolor2, matrix_modeltolight, matrix_modeltoattenuationxyz, matrix_modeltoattenuationz, layer->texture, layer->nmap, layer->texture, lightcubemap, LIGHTING_DIFFUSE);
319                         }
320                 }
321         }
322 }
323