/**
* @brief Set the surface state according to surface flags and bind the texture
* @sa R_DrawSurfaces
*/
static void R_SetSurfaceState (const mBspSurface_t *surf)
{
image_t *image;
if (r_state.blend_enabled) { /* alpha blend */
vec4_t color = {1.0, 1.0, 1.0, 1.0};
switch (surf->texinfo->flags & (SURF_BLEND33 | SURF_BLEND66)) {
case SURF_BLEND33:
color[3] = 0.33;
break;
case SURF_BLEND66:
color[3] = 0.66;
break;
}
R_Color(color);
}
image = surf->texinfo->image;
R_BindTexture(image->texnum); /* texture */
if (texunit_lightmap.enabled) { /* lightmap */
if (surf->flags & MSURF_LIGHTMAP)
R_BindLightmapTexture(surf->lightmap_texnum);
}
R_SetSurfaceBumpMappingParameters(surf, image->normalmap, image->specularmap);
R_EnableGlowMap(image->glowmap);
R_CheckError();
}
/**
* @brief Manages state for stages supporting static, dynamic, and per-pixel lighting.
*/
static void R_StageLighting (const mBspSurface_t *surf, const materialStage_t *stage)
{
/* if the surface has a lightmap, and the stage specifies lighting.. */
if ((surf->flags & MSURF_LIGHTMAP) &&
(stage->flags & (STAGE_LIGHTMAP | STAGE_LIGHTING))) {
R_EnableTexture(&texunit_lightmap, true);
R_BindLightmapTexture(surf->lightmap_texnum);
/* hardware lighting */
/** @todo fix it and enable it back for r_materials 1 */
if (r_materials->integer > 1) {
if ((stage->flags & STAGE_LIGHTING)) {
R_EnableLighting(r_state.world_program, true);
R_SetSurfaceBumpMappingParameters(surf, stage->image->normalmap, stage->image->specularmap);
} else {
R_SetSurfaceBumpMappingParameters(surf, nullptr, nullptr);
R_EnableLighting(nullptr, false);
}
}
} else {
if (!r_state.lighting_enabled)
return;
R_EnableLighting(nullptr, false);
R_EnableTexture(&texunit_lightmap, false);
}
}
/*
* R_SetSurfaceState_default
*/
static void R_SetSurfaceState_default(const r_bsp_surface_t *surf) {
r_image_t *image;
float a;
if (r_state.blend_enabled) { // alpha blend
switch (surf->texinfo->flags & (SURF_BLEND_33 | SURF_BLEND_66)) {
case SURF_BLEND_33:
a = 0.33;
break;
case SURF_BLEND_66:
a = 0.66;
break;
default: // both flags mean use the texture's alpha channel
a = 1.0;
break;
}
glColor4f(1.0, 1.0, 1.0, a);
}
image = surf->texinfo->image;
if (texunit_diffuse.enabled) // diffuse texture
R_BindTexture(image->texnum);
if (texunit_lightmap.enabled) // lightmap texture
R_BindLightmapTexture(surf->lightmap_texnum);
if (r_state.lighting_enabled) { // hardware lighting
if (r_bumpmap->value) { // bump mapping
if (image->normalmap) {
R_BindDeluxemapTexture(surf->deluxemap_texnum);
R_BindNormalmapTexture(image->normalmap->texnum);
R_EnableBumpmap(&image->material, true);
} else
R_EnableBumpmap(NULL, false);
}
if (surf->light_frame == r_locals.light_frame) // dynamic light sources
R_EnableLights(surf->lights);
else
R_EnableLights(0);
}
}
/**
* @brief Draw the day and night images of a flat geoscape
* multitexture feature is used to blend the images
* @sa R_Draw3DGlobe
* @param[in] p The horizontal shift of the night map
* @param[in] cx The x texture coordinate
* @param[in] cy The y texture coordinate
* @param[in] iz The zoomlevel of the geoscape - see ccs.zoom
* @param[in] map The geoscape map to draw (can be changed in the campaign definition)
* @param[in] overlayNation,overlayXVI,overlayRadar Whether these overlays should be drawn or not
*/
void R_DrawFlatGeoscape (const vec2_t nodePos, const vec2_t nodeSize, float p, float cx, float cy, float iz, const char *map, bool overlayNation, bool overlayXVI, bool overlayRadar, image_t *r_dayandnightTexture, image_t *r_xviTexture, image_t *r_radarTexture)
{
image_t *gl;
float geoscape_texcoords[4 * 2];
short geoscape_verts[4 * 2];
/* normalize */
const float nx = nodePos[0] * viddef.rx;
const float ny = nodePos[1] * viddef.ry;
const float nw = nodeSize[0] * viddef.rx;
const float nh = nodeSize[1] * viddef.ry;
/* load day image */
gl = R_FindImage(va("pics/geoscape/%s_day", map), it_wrappic);
if (gl == r_noTexture)
Com_Error(ERR_FATAL, "Could not load geoscape day image");
/* alter the array pointers */
glVertexPointer(2, GL_SHORT, 0, geoscape_verts);
R_BindArray(GL_TEXTURE_COORD_ARRAY, GL_FLOAT, geoscape_texcoords);
geoscape_texcoords[0] = cx - iz;
geoscape_texcoords[1] = cy - iz;
geoscape_texcoords[2] = cx + iz;
geoscape_texcoords[3] = cy - iz;
geoscape_texcoords[4] = cx + iz;
geoscape_texcoords[5] = cy + iz;
geoscape_texcoords[6] = cx - iz;
geoscape_texcoords[7] = cy + iz;
geoscape_verts[0] = nx;
geoscape_verts[1] = ny;
geoscape_verts[2] = nx + nw;
geoscape_verts[3] = ny;
geoscape_verts[4] = nx + nw;
geoscape_verts[5] = ny + nh;
geoscape_verts[6] = nx;
geoscape_verts[7] = ny + nh;
/* draw day image */
R_BindTexture(gl->texnum);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
refdef.batchCount++;
/* draw night map */
gl = R_FindImage(va("pics/geoscape/%s_night", map), it_wrappic);
/* maybe the campaign map doesn't have a night image */
if (gl != r_noTexture) {
float geoscape_nighttexcoords[4 * 2];
R_BindTexture(gl->texnum);
R_EnableTexture(&texunit_lightmap, true);
R_SelectTexture(&texunit_lightmap);
geoscape_nighttexcoords[0] = geoscape_texcoords[0] + p;
geoscape_nighttexcoords[1] = geoscape_texcoords[1];
geoscape_nighttexcoords[2] = geoscape_texcoords[2] + p;
geoscape_nighttexcoords[3] = geoscape_texcoords[3];
geoscape_nighttexcoords[4] = geoscape_texcoords[4] + p;
geoscape_nighttexcoords[5] = geoscape_texcoords[5];
geoscape_nighttexcoords[6] = geoscape_texcoords[6] + p;
geoscape_nighttexcoords[7] = geoscape_texcoords[7];
R_BindArray(GL_TEXTURE_COORD_ARRAY, GL_FLOAT, geoscape_nighttexcoords);
R_BindTexture(r_dayandnightTexture->texnum);
R_SelectTexture(&texunit_diffuse);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
refdef.batchCount++;
R_SelectTexture(&texunit_lightmap);
R_BindArray(GL_TEXTURE_COORD_ARRAY, GL_FLOAT, geoscape_texcoords);
R_EnableTexture(&texunit_lightmap, false);
}
/* draw nation overlay */
if (overlayNation) {
gl = R_FindImage(va("pics/geoscape/%s_nations_overlay", map), it_wrappic);
if (gl == r_noTexture)
Com_Error(ERR_FATAL, "Could not load geoscape nation overlay image");
/* draw day image */
R_BindTexture(gl->texnum);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
refdef.batchCount++;
}
/* draw XVI image */
if (overlayXVI) {
gl = R_FindImage(va("pics/geoscape/%s_xvi_overlay", map), it_wrappic);
if (gl == r_noTexture)
Com_Error(ERR_FATAL, "Could not load xvi overlay image");
R_BindTexture(gl->texnum);
R_EnableTexture(&texunit_lightmap, true);
R_BindLightmapTexture(r_xviTexture->texnum);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
refdef.batchCount++;
R_EnableTexture(&texunit_lightmap, false);
}
/* draw radar image */
if (overlayRadar) {
R_BindTexture(r_radarTexture->texnum);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
refdef.batchCount++;
}
/* and restore them */
R_BindDefaultArray(GL_TEXTURE_COORD_ARRAY);
R_BindDefaultArray(GL_VERTEX_ARRAY);
}
