/*
* R_EnableBumpmap
*
* Enables bumpmapping while updating program parameters to reflect the
* specified material.
*/
void R_EnableBumpmap(r_material_t *material, boolean_t enable) {
if (!r_state.lighting_enabled)
return;
if (!r_bumpmap->value)
return;
R_UseMaterial(material);
if (r_state.bumpmap_enabled == enable)
return;
r_state.bumpmap_enabled = enable;
if (enable) { // toggle state
R_EnableAttribute("TANGENT");
R_ProgramParameter1i("BUMPMAP", 1);
} else {
R_DisableAttribute("TANGENT");
R_ProgramParameter1i("BUMPMAP", 0);
}
}
void R_SetSurfaceBumpMappingParameters (const mBspSurface_t *surf, const image_t *normalMap, const image_t *specularMap)
{
if (!r_state.lighting_enabled)
return;
if (!r_bumpmap->value)
return;
assert(surf);
if (normalMap && (surf->flags & MSURF_LIGHTMAP)) {
const image_t *image = surf->texinfo->image;
R_BindDeluxemapTexture(surf->deluxemap_texnum);
R_EnableBumpmap(normalMap);
R_EnableSpecularMap(specularMap, true);
R_UseMaterial(&image->material);
} else {
R_EnableBumpmap(NULL);
R_EnableSpecularMap(NULL, false);
R_UseMaterial(NULL);
}
}
/**
* @brief Enable or disable realtime dynamic lighting for models
* @param lights The lights to enable
* @param numLights The amount of lights in the given lights list
* @param inShadow Whether model is shadowed from the sun
* @param enable Whether to turn realtime lighting on or off
*/
void R_EnableModelLights (const light_t **lights, int numLights, bool inShadow, bool enable)
{
int i;
int maxLights = r_dynamic_lights->integer;
vec4_t blackColor = {0.0, 0.0, 0.0, 1.0};
const vec4_t whiteColor = {1.0, 1.0, 1.0, 1.0};
const vec4_t defaultLight0Position = {0.0, 0.0, 1.0, 0.0};
vec3_t lightPositions[MAX_GL_LIGHTS];
vec4_t lightParams[MAX_GL_LIGHTS];
if (r_programs->integer == 0) { /* Fixed function path renderer got only the sunlight */
/* Setup OpenGL light #0 to act as a sun and environment light */
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_COLOR_MATERIAL);
#ifndef GL_VERSION_ES_CM_1_0
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
#endif
glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 1.0);
glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0);
glLightf(GL_LIGHT0, GL_QUADRATIC_ATTENUATION, 0);
glLightfv(GL_LIGHT0, GL_SPECULAR, blackColor);
glLightfv(GL_LIGHT0, GL_AMBIENT, refdef.modelAmbientColor);
glLightfv(GL_LIGHT0, GL_POSITION, refdef.sunVector);
if (enable) {
if (inShadow) {
/* ambient only */
glLightfv(GL_LIGHT0, GL_DIFFUSE, blackColor);
} else {
/* Full sunlight */
glLightfv(GL_LIGHT0, GL_DIFFUSE, refdef.sunDiffuseColor);
}
} else {
/* restore the default OpenGL state */
glDisable(GL_LIGHTING);
glDisable(GL_COLOR_MATERIAL);
glLightfv(GL_LIGHT0, GL_POSITION, defaultLight0Position);
glLightfv(GL_LIGHT0, GL_AMBIENT, blackColor);
glLightfv(GL_LIGHT0, GL_DIFFUSE, whiteColor);
glLightfv(GL_LIGHT0, GL_SPECULAR, whiteColor);
}
return;
}
assert(numLights <= MAX_GL_LIGHTS);
if (!enable || !r_state.lighting_enabled) {
if (r_state.dynamic_lighting_enabled) {
R_DisableAttribute("TANGENTS"); /** @todo is it a good idea? */
if (maxLights) {
for (i = 0; i < maxLights; i++)
Vector4Set(lightParams[i], 0, 0, 0, 1);
/* Send light data to shaders */
R_ProgramParameter3fvs("LIGHTPOSITIONS", maxLights, (GLfloat *)lightPositions);
R_ProgramParameter4fvs("LIGHTPARAMS", maxLights, (GLfloat *)lightParams);
}
}
r_state.dynamic_lighting_enabled = false;
return;
}
/** @todo assert? */
if (numLights > maxLights)
numLights = maxLights;
r_state.dynamic_lighting_enabled = true;
R_EnableAttribute("TANGENTS");
R_UseMaterial(&defaultMaterial);
R_ProgramParameter3fv("AMBIENT", refdef.modelAmbientColor);
if (inShadow) {
R_ProgramParameter3fv("SUNCOLOR", blackColor);
} else {
R_ProgramParameter3fv("SUNCOLOR", refdef.sunDiffuseColor);
}
if (!maxLights)
return;
for (i = 0; i < numLights; i++) {
const light_t *light = lights[i];
GLPositionTransform(r_locals.world_matrix, light->origin, lightPositions[i]);
VectorCopy(light->color, lightParams[i]);
lightParams[i][3] = 16.0 / (light->radius * light->radius);
}
/* if there aren't enough active lights, turn off the rest */
for (; i < maxLights; i++)
Vector4Set(lightParams[i], 0, 0, 0, 1);
/* Send light data to shaders */
R_ProgramParameter3fvs("LIGHTPOSITIONS", maxLights, (GLfloat *)lightPositions);
R_ProgramParameter4fvs("LIGHTPARAMS", maxLights, (GLfloat *)lightParams);
}
