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light: add a limited version of Lunaran's "_dome" light feature 

that only supports domes oriented up/down like sunlight2/3
This commit is contained in:
Eric Wasylishen 2019-10-09 02:12:04 -06:00
parent a36a128b30
commit fa62b20603
3 changed files with 67 additions and 15 deletions
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3
include/light/entities.hh
View File

@ -76,6 +76,7 @@ public:
lockable_vec_t dirtscale, dirtgain, dirt, deviance, samples, projfov, bouncescale;
lockable_vec_t dirt_off_radius, dirt_on_radius;
lockable_vec_t sun; //mxd
lockable_vec_t dome;
lockable_vec_t falloff; //mxd
lockable_bool_t bleed;
lockable_vec3_t origin, color, mangle, projangle;
@ -115,6 +116,7 @@ public:
dirt_off_radius { "dirt_off_radius", 0.0f },
dirt_on_radius { "dirt_on_radius", 0.0f },
sun { "sun", 0 }, //mxd
dome { "dome", 0 },
falloff{ "falloff", 0.0f }, //mxd
bleed { "bleed", false },
origin { "origin", 0, 0, 0 },
@ -137,6 +139,7 @@ public:
&dirtscale, &dirtgain, &dirt, &deviance, &samples, &projfov, &bouncescale,
&dirt_off_radius, &dirt_on_radius,
&sun, //mxd
&dome,
&falloff, //mxd
&origin, &color, &mangle, &projangle, &project_texture, &suntexture
}};

71
light/entities.cc
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@ -537,10 +537,13 @@ SetupSuns(const globalconfig_t &cfg)
* Setup a dome of suns for the "_sunlight2" worldspawn key.
*
* From q3map2
*
* FIXME: this is becoming a mess
* =============
*/
static void
SetupSkyDome(const globalconfig_t &cfg)
SetupSkyDome(const globalconfig_t &cfg, float upperLight, const vec3_t upperColor, const int upperDirt, const float upperAnglescale, const int upperStyle, const std::string& upperSuntexture,
float lowerLight, const vec3_t lowerColor, const int lowerDirt, const float lowerAnglescale, const int lowerStyle, const std::string& lowerSuntexture)
{
int i, j, numSuns;
int angleSteps, elevationSteps;
@ -554,7 +557,7 @@ SetupSkyDome(const globalconfig_t &cfg)
iterations = qmax(iterations, 2);
/* dummy check */
if ( cfg.sunlight2.floatValue() <= 0.0f && cfg.sunlight3.floatValue() <= 0.0f ) {
if ( upperLight <= 0.0f && lowerLight <= 0.0f ) {
return;
}
@ -567,15 +570,9 @@ SetupSkyDome(const globalconfig_t &cfg)
/* calc individual sun brightness */
numSuns = angleSteps * elevationSteps + 1;
if (cfg.sunlight2.floatValue() > 0) {
logprint("using %d suns for _sunlight2. total light: %f color: %f %f %f\n", numSuns, cfg.sunlight2.floatValue(), (*cfg.sunlight2_color.vec3Value())[0], (*cfg.sunlight2_color.vec3Value())[1], (*cfg.sunlight2_color.vec3Value())[2]);
}
if (cfg.sunlight3.floatValue() > 0) {
logprint("using %d suns for _sunlight3. total light: %f color: %f %f %f\n", numSuns, cfg.sunlight3.floatValue(), (*cfg.sunlight3_color.vec3Value())[0], (*cfg.sunlight3_color.vec3Value())[1], (*cfg.sunlight3_color.vec3Value())[2]);
}
const float sunlight2value = cfg.sunlight2.floatValue() / numSuns;
const float sunlight3value = cfg.sunlight3.floatValue() / numSuns;
const float sunlight2value = upperLight / numSuns;
const float sunlight3value = lowerLight / numSuns;
/* iterate elevation */
elevation = elevationStep * 0.5f;
@ -592,14 +589,14 @@ SetupSkyDome(const globalconfig_t &cfg)
/* insert top hemisphere light */
if (sunlight2value > 0) {
AddSun(cfg, direction, sunlight2value, *cfg.sunlight2_color.vec3Value(), cfg.sunlight2_dirt.intValue(), cfg.global_anglescale.floatValue(), 0, "");
AddSun(cfg, direction, sunlight2value, upperColor, upperDirt, upperAnglescale, upperStyle, upperSuntexture);
}
direction[ 2 ] = -direction[ 2 ];
/* insert bottom hemisphere light */
if (sunlight3value > 0) {
AddSun(cfg, direction, sunlight3value, *cfg.sunlight3_color.vec3Value(), cfg.sunlight2_dirt.intValue(), cfg.global_anglescale.floatValue(), 0, "");
AddSun(cfg, direction, sunlight3value, lowerColor, lowerDirt, lowerAnglescale, lowerStyle, lowerSuntexture);
}
/* move */
@ -615,13 +612,57 @@ SetupSkyDome(const globalconfig_t &cfg)
VectorSet( direction, 0.0f, 0.0f, -1.0f );
if (sunlight2value > 0) {
AddSun(cfg, direction, sunlight2value, *cfg.sunlight2_color.vec3Value(), cfg.sunlight2_dirt.intValue(), cfg.global_anglescale.floatValue(), 0, "");
AddSun(cfg, direction, sunlight2value, upperColor, upperDirt, upperAnglescale, upperStyle, upperSuntexture);
}
VectorSet( direction, 0.0f, 0.0f, 1.0f );
if (sunlight3value > 0) {
AddSun(cfg, direction, sunlight3value, *cfg.sunlight3_color.vec3Value(), cfg.sunlight2_dirt.intValue(), cfg.global_anglescale.floatValue(), 0, "");
AddSun(cfg, direction, sunlight3value, lowerColor, lowerDirt, lowerAnglescale, lowerStyle, lowerSuntexture);
}
}
static void
SetupSkyDomes(const globalconfig_t &cfg)
{
// worldspawn "legacy" skydomes
SetupSkyDome(cfg, cfg.sunlight2.floatValue(), *cfg.sunlight2_color.vec3Value(), cfg.sunlight2_dirt.intValue(), cfg.global_anglescale.floatValue(), 0, "",
cfg.sunlight3.floatValue(), *cfg.sunlight3_color.vec3Value(), cfg.sunlight2_dirt.intValue(), cfg.global_anglescale.floatValue(), 0, "");
// new "_dome" entities
for (light_t &entity : all_lights) {
if (entity.dome.intValue() == 1 && entity.light.intValue() > 0) {
// Set direction to dome center
vec3_t dirToDomeCenter;
if (entity.targetent) {
vec3_t target_pos;
EntDict_VectorForKey(*entity.targetent, "origin", target_pos);
VectorSubtract(target_pos, *entity.origin.vec3Value(), dirToDomeCenter);
} else if (VectorLengthSq(*entity.mangle.vec3Value()) > 0) {
glm_to_vec3_t(vec_from_mangle(vec3_t_to_glm(*entity.mangle.vec3Value())), dirToDomeCenter);
} else {
logprint("WARNING: dome light at (%s) missing direction. assuming dome center is downwards.\n", entity.origin.stringValue().c_str());
VectorSet(dirToDomeCenter, 0, 0, -1);
}
const vec3_t up {0, 0, 1};
const vec3_t down {0, 0, -1};
if (VectorCompare(dirToDomeCenter, down, EQUAL_EPSILON)) {
// Add the upper dome, like sunlight2 (pointing down)
SetupSkyDome(cfg, entity.light.floatValue(), *entity.color.vec3Value(), entity.dirt.intValue(), entity.anglescale.floatValue(), entity.style.intValue(), entity.suntexture.stringValue(),
0, vec3_origin, 0, 0, 0, "");
} else if (VectorCompare(dirToDomeCenter, up, EQUAL_EPSILON)) {
// Add the lower dome, like sunlight3 (pointing up)
SetupSkyDome(cfg, 0, vec3_origin, 0, 0, 0, "",
entity.light.floatValue(), *entity.color.vec3Value(), entity.dirt.intValue(), entity.anglescale.floatValue(), entity.style.intValue(), entity.suntexture.stringValue());
} else {
logprint("WARNING: dome lights only support up or down currently, ignoring entity at (%s).\n", entity.origin.stringValue().c_str());
}
// Disable the light itself...
entity.light.setFloatValue(0.0f);
}
}
}
@ -1311,7 +1352,7 @@ SetupLights(const globalconfig_t &cfg, const mbsp_t *bsp)
MatchTargets();
SetupSpotlights(cfg);
SetupSuns(cfg);
SetupSkyDome(cfg);
SetupSkyDomes(cfg);
FixLightsOnFaces(bsp);
EstimateLightVisibility();

8
man/light.1
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@ -436,6 +436,14 @@ The following light properties correspond to these sunlight settings:
_suntexture => this sunlight is only emitted from faces with this texture name
.fi
.IP "\fB""_dome"" ""n""\fP"
Set to 1 to make this entity a dome light, as an alternative to using the sunlight2 and sunlight3 worldspawn keys. Acts as an area light at infinite distance that emits from sky surfaces.
The light itself is disabled, so it can be placed anywhere in the map.
Set the incoming direction of the center of the dome with "mangle". For comparison, sunlight2 is straight down (0 -90 0) and sunlight3 is straight up (0 90 0). If the light targets an info_null entity, the direction towards that entity sets the direction of the center of the dome.
"targetname", "style", "_color", "_anglescale"/"_anglesense", "_suntexture", and dirt parameters are all supported.
.SH "OTHER INFORMATION"
The "\\b" escape sequence toggles red text on/off, you can use this in any strings in the map file. e.g. "message" "Here is \\bsome red text\\b..."