void R_DrawStretchImage (float x, float y, int w, int h, const image_t *image)
{
if (!image)
return;
R_DrawTexture(image->texnum, x * viddef.rx, y * viddef.ry, w * viddef.rx, h * viddef.ry);
}
/**
* @brief Draws an image or parts of it
* @param x X position to draw the image to
* @param y Y position to draw the image to
* @param[in] image Pointer to the imlage to display
*/
void R_DrawImage (float x, float y, const image_t *image)
{
if (!image)
return;
R_DrawTexture(image->texnum, x * viddef.rx, y * viddef.ry, image->width * viddef.rx, image->height * viddef.ry);
}
/**
* @brief responsible for drawing the 3d globe on geoscape
* param[in] rotate the rotate angle of the globe
* param[in] zoom the current globe zoon
* param[in] map the prefix of the map to use (image must be at base/pics/menu/\<map\>_[day|night])
* @sa R_DrawFlatGeoscape
* @sa R_SphereGenerate
*/
void R_Draw3DGlobe (const vec2_t pos, const vec2_t size, int day, int second, const vec3_t rotate, float zoom, const char *map,
bool disableSolarRender, float ambient, bool overlayNation, bool overlayXVI, bool overlayRadar, image_t *r_xviTexture,
image_t *r_radarTexture, bool renderNationGlow)
{
/* globe scaling */
const float fullscale = zoom / STANDARD_3D_ZOOM;
/* lighting colors */
static const vec4_t diffuseLightColor = { 1.75f, 1.75f, 1.75f, 1.0f };
static const vec4_t specularLightColor = { 2.0f, 1.9f, 1.7f, 1.0f };
static const vec4_t darknessLightColor = { 0.0f, 0.0f, 0.0f, 1.0f };
static const vec4_t brightDiffuseLightColor = { 5.0f, 5.0f, 5.0f, 1.0f };
const vec4_t ambientLightColor = { ambient + 0.2f, ambient + 0.2f, ambient + 0.2f, ambient + 0.2f };
/* billboard textures */
image_t *starfield;
image_t *halo;
image_t *sun;
image_t *sunOverlay;
/* set distance of the sun and moon to make them static on starfield when
* time is stoped. this distance should be used for any celestial body
* considered at infinite location (sun, moon) */
static const float celestialDist = 1.37f * SKYBOX_HALFSIZE;
static const float moonSize = 0.025f;
vec4_t sunPos;
vec4_t antiSunPos;
vec4_t moonLoc;
vec4_t sunLoc;
/* normalize */
const float nx = pos[0] * viddef.rx;
const float ny = pos[1] * viddef.ry;
const float nw = size[0] * viddef.rx;
const float nh = size[1] * viddef.ry;
/* Earth center is in the middle of node.
* Due to Orthographic view, this is also camera position */
const vec3_t earthPos = { nx + nw / 2.0f, ny + nh / 2.0f, 0.0f };
/* estimate the progress through the current season so we can do
* smooth transitions between textures. Currently there are 12
* "seasons", because we have one image per Earth-month. */
const float season = (float) (day % DAYS_PER_YEAR) / ((float) (DAYS_PER_YEAR) / (float) (SEASONS_PER_YEAR));
const int currSeason = (int) floorf(season) % SEASONS_PER_YEAR;
const int nextSeason = (int) ceilf(season) % SEASONS_PER_YEAR;
const float seasonProgress = season - (float) currSeason;
/* Compute sun position in absolute frame */
const float q = (day % DAYS_PER_YEAR * SECONDS_PER_DAY + second) * (2.0f * M_PI / (SECONDS_PER_DAY * DAYS_PER_YEAR)); /* sun rotation (year) */
const float a = cos(q) * SIN_ALPHA; /* due to earth obliquity */
const float sqrta = sqrt(0.5f * (1 - a * a));
/* earth rotation (day) */
const float p = (second - SECONDS_PER_DAY / 4) * (2.0f * M_PI / SECONDS_PER_DAY);
/* lunar orbit */
const float m = p + (((double)((10 * day % 249) / 10.0f) + ((double)second / (double)SECONDS_PER_DAY)) / 24.9f) * (2.0f * M_PI);
glPushMatrix();
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glDisable(GL_LIGHTING);
/* draw the starfield, rotating with the planet */
starfield = R_FindImage(va("pics/geoscape/%s_stars", map), it_wrappic);
if (starfield != r_noTexture)
R_DrawStarfield(starfield->texnum, earthPos, rotate, p);
glPopMatrix();
/* set up position vectors for celestial bodies */
Vector4Set(sunPos, cos(p) * sqrta, -sin(p) * sqrta, a, 0);
Vector4Set(antiSunPos, -cos(p) * sqrta, sin(p) * sqrta, -a, 0);
/* Rotate the sun in the relative frame of player view, to get sun location */
R_RotateCelestialBody(sunPos, sunLoc, rotate, earthPos, 1.0f);
/* load sun texture image */
sun = R_FindImage(va("pics/geoscape/%s_sun", map), it_wrappic);
sunOverlay = R_FindImage(va("pics/geoscape/%s_sun_overlay", map), it_pic);
if (sun != r_noTexture && sunOverlay != r_noTexture && sunLoc[2] > 0 && !disableSolarRender) {
const int sunx = earthPos[0] + viddef.rx * (-128.0f + celestialDist * (sunLoc[0] - earthPos[0]));
const int suny = earthPos[1] + viddef.ry * (-128.0f + celestialDist * (sunLoc[1] - earthPos[1]));
R_DrawTexture(sunOverlay->texnum, sunx, suny, 256.0f * viddef.rx, 256.0f * viddef.ry);
R_DrawBuffers(2);
R_DrawTexture(sun->texnum, sunx, suny, 256.0 * viddef.rx, 256.0 * viddef.ry);
R_DrawBuffers(1);
}
/* calculate position of the moon (it rotates around earth with a period of
* about 24.9 h, and we must take day into account to avoid moon to "jump"
* every time the day is changing) */
VectorSet(moonLoc, cos(m) * sqrta, -sin(m) * sqrta, a);
R_RotateCelestialBody(moonLoc, moonLoc, rotate, earthPos, celestialDist);
/* free last month's texture image */
if (r_globeEarth.season != currSeason) {
r_globeEarth.season = currSeason;
R_FreeImage(r_globeEarth.texture);
}
/* load diffuse texture map (with embedded night-glow map as alpha channel) */
r_globeEarth.texture = R_FindImage(va("pics/geoscape/%s/%s_season_%02d", r_config.lodDir, map, currSeason), it_wrappic);
if (r_globeEarth.texture == r_noTexture)
Com_Error(ERR_FATAL, "Could not find pics/geoscape/%s/%s_season_%02d\n", r_config.lodDir, map, currSeason);
/* set up for advanced GLSL rendering if we have the capability */
if (r_programs->integer) {
r_globeEarth.glslProgram = r_state.geoscape_program;
/* load earth image for the next month so we can blend them */
r_globeEarth.blendTexture = R_FindImage(va("pics/geoscape/%s/%s_season_%02d", r_config.lodDir, map, nextSeason), it_wrappic);
if (r_globeEarth.blendTexture == r_noTexture)
Com_Error(ERR_FATAL, "Could not find pics/geoscape/%s/%s_season_%02d\n", r_config.lodDir, map, nextSeason);
/* load normal map (with embedded gloss map as alpha channel) */
r_globeEarth.normalMap = R_FindImage(va("pics/geoscape/%s/%s_bump", r_config.lodDir, map), it_wrappic);
if (r_globeEarth.normalMap == r_noTexture)
r_globeEarth.normalMap = nullptr;
/* weight the blending based on how much of the month has elapsed */
r_globeEarth.blendScale = seasonProgress;
/* set up lights for nighttime city glow */
VectorCopy(antiSunPos, r_globeEarth.nightLightPos);
glLightfv(GL_LIGHT1, GL_AMBIENT, darknessLightColor);
glLightfv(GL_LIGHT1, GL_DIFFUSE, brightDiffuseLightColor);
glLightfv(GL_LIGHT1, GL_SPECULAR, darknessLightColor);
r_globeEarth.glowScale = 0.7f;
}
/* load moon texture image */
r_globeMoon.texture = R_FindImage(va("pics/geoscape/%s_moon", map), it_wrappic);
/* globe texture scaling */
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glScalef(2.0f, 1.0f, 1.0f);
glMatrixMode(GL_MODELVIEW);
/* enable the lighting */
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLightColor);
glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLightColor);
glLightfv(GL_LIGHT0, GL_SPECULAR, specularLightColor);
/* draw the moon */
if (r_globeMoon.texture != r_noTexture && moonLoc[2] > 0 && !disableSolarRender)
R_SphereRender(&r_globeMoon, moonLoc, rotate, moonSize, sunPos);
/* activate depth to hide 3D models behind earth */
glEnable(GL_DEPTH_TEST);
/* draw the earth */
R_DrawBuffers(2);
#if 0 /* old rendering code which doesn't render city lights in FFP */
if (r_programs->integer == 0) /* ignore alpha channel, since the city-light map is stored there */
glBlendFunc(GL_ONE, GL_ZERO);
R_SphereRender(&r_globeEarth, earthPos, rotate, fullscale, sunPos);
if (r_programs->integer == 0) /* restore default blend function */
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
#else /* new which does render city lights in FFP */
if (r_programs->integer == 0) {
/* set up rendering of city lights map, which is stored in alpha channel; OpenGL 1.3 required */
R_SelectTexture(&texunit_diffuse); /* select texture to edit texture environment for */
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE); /* enable color combiner */
/* setup texture combiner to blend between daylight diffuse map stored in the RGB channels of the diffuse texture
* and the monochomatic emission map (which simulates city lights) stored in the alpha channel;
* incoming color value is the blend factor.
*/
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE); /* set day color as blending target*/
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_TEXTURE); /* set night color as blending source */
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_ALPHA);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_PREVIOUS); /* set incoming color as blending factor */
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_COLOR);
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE); /* set blending mode to interpolation from src1 to src0 */
/* copy alpha from incoming color, bypassing the value read from texture, which is not a "real" alpha anyway */
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS);
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
}
R_SphereRender(&r_globeEarth, earthPos, rotate, fullscale, sunPos);
if (r_programs->integer == 0) { /* disable combiner */
R_SelectTexture(&texunit_diffuse);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
}
#endif
r_globeEarthAtmosphere.texture = R_FindImage(va("pics/geoscape/%s_atmosphere", map), it_wrappic);
/* Draw earth atmosphere */
/** @todo render atmosphere glow even when postprocessing is disabled */
if (r_programs->integer && r_postprocess->integer) {
r_globeEarthAtmosphere.normalMap = r_globeEarth.normalMap;
r_globeEarthAtmosphere.glowScale = 1.0;
r_globeEarthAtmosphere.blendScale = -1.0;
r_globeEarthAtmosphere.glslProgram = r_state.atmosphere_program;
R_SphereRender(&r_globeEarthAtmosphere, earthPos, rotate, fullscale, sunPos);
} else {
halo = R_FindImage("pics/geoscape/map_earth_halo", it_pic);
if (halo != r_noTexture) {
/** @todo Replace this magic number with some speaking constant */
const float earthSizeX = fullscale * 20500.0f * viddef.rx;
const float earthSizeY = fullscale * 20500.0f * viddef.ry;
glMatrixMode(GL_TEXTURE);
glPushMatrix();
glLoadIdentity();
glDisable(GL_LIGHTING);
R_DrawTexture(halo->texnum, earthPos[0] - earthSizeX * 0.5f, earthPos[1] - earthSizeY * 0.5f, earthSizeX, earthSizeY);
glEnable(GL_LIGHTING);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
}
}
R_DrawBuffers(1);
glDisable(GL_DEPTH_TEST);
/* draw nation overlay */
if (overlayNation) {
r_globeEarth.overlay = R_FindImage(va("pics/geoscape/%s_nations_overlay", map), it_wrappic);
if (r_globeEarth.overlay == r_noTexture)
Com_Error(ERR_FATAL, "Could not load geoscape nation overlay image");
R_SphereRender(&r_globeEarth, earthPos, rotate, fullscale, sunPos);
if (renderNationGlow) {
/* draw glowing borders */
r_globeEarth.overlay = R_FindImage(va("pics/geoscape/%s_nations_overlay_glow", map), it_wrappic);
if (r_globeEarth.overlay == r_noTexture)
Com_Error(ERR_FATAL, "Could not load geoscape nation overlay glow image");
R_DrawBuffers(2);
glDisable(GL_LIGHTING);
R_SphereRender(&r_globeEarth, earthPos, rotate, fullscale, sunPos);
glEnable(GL_LIGHTING);
R_DrawBuffers(1);
}
r_globeEarth.overlay = nullptr;
}
/* draw XVI overlay */
if (overlayXVI) {
r_globeEarth.overlay = R_FindImage(va("pics/geoscape/%s_xvi_overlay", map), it_wrappic);
r_globeEarth.overlayAlphaMask = r_xviTexture;
assert(r_globeEarth.overlayAlphaMask);
R_SphereRender(&r_globeEarth, earthPos, rotate, fullscale, sunPos);
r_globeEarth.overlayAlphaMask = nullptr;
r_globeEarth.overlay = nullptr;
}
/* draw radar overlay */
if (overlayRadar) {
r_globeEarth.overlay = r_radarTexture;
assert(r_globeEarth.overlay);
R_SphereRender(&r_globeEarth, earthPos, rotate, fullscale, sunPos);
r_globeEarth.overlay = nullptr;
}
/* disable 3d geoscape lighting */
glDisable(GL_LIGHTING);
/* restore the previous matrix */
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
}
