/* ** gl_light.cpp ** Light level / fog management / dynamic lights ** **--------------------------------------------------------------------------- ** Copyright 2002-2005 Christoph Oelckers ** All rights reserved. ** ** Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions ** are met: ** ** 1. Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** 2. Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in the ** documentation and/or other materials provided with the distribution. ** 3. The name of the author may not be used to endorse or promote products ** derived from this software without specific prior written permission. ** 4. When not used as part of GZDoom or a GZDoom derivative, this code will be ** covered by the terms of the GNU Lesser General Public License as published ** by the Free Software Foundation; either version 2.1 of the License, or (at ** your option) any later version. ** 5. Full disclosure of the entire project's source code, except for third ** party libraries is mandatory. (NOTE: This clause is non-negotiable!) ** ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. **--------------------------------------------------------------------------- ** */ #include "gl/system/gl_system.h" #include "c_dispatch.h" #include "p_local.h" #include "p_effect.h" #include "vectors.h" #include "gl/gl_functions.h" #include "g_level.h" #include "gl/system/gl_cvars.h" #include "gl/renderer/gl_renderer.h" #include "gl/renderer/gl_lightdata.h" #include "gl/data/gl_data.h" #include "gl/dynlights/gl_dynlight.h" #include "gl/scene/gl_drawinfo.h" #include "gl/scene/gl_portal.h" #include "gl/shaders/gl_shader.h" #include "gl/textures/gl_material.h" //========================================================================== // // Gets the light for a sprite - takes dynamic lights into account // //========================================================================== bool gl_GetSpriteLight(AActor *self, fixed_t x, fixed_t y, fixed_t z, subsector_t * subsec, int desaturation, float * out, line_t *line, int side) { ADynamicLight *light; float frac, lr, lg, lb; float radius; bool changed = false; out[0]=out[1]=out[2]=0; for(int j=0;j<2;j++) { // Go through both light lists FLightNode * node = subsec->lighthead[j]; while (node) { light=node->lightsource; if (!light->owned || light->target == NULL || light->target->IsVisibleToPlayer()) { if (!(light->flags2&MF2_DORMANT) && (!(light->flags4&MF4_DONTLIGHTSELF) || light->target != self)) { float dist = FVector3(FIXED2FLOAT(x - light->x), FIXED2FLOAT(y - light->y), FIXED2FLOAT(z - light->z)).Length(); radius = light->GetRadius() * gl_lights_size; if (dist < radius) { frac = 1.0f - (dist / radius); if (frac > 0) { if (line != NULL) { if (P_PointOnLineSide(light->x, light->y, line) != side) { node = node->nextLight; continue; } } lr = light->GetRed() / 255.0f * gl_lights_intensity; lg = light->GetGreen() / 255.0f * gl_lights_intensity; lb = light->GetBlue() / 255.0f * gl_lights_intensity; if (light->IsSubtractive()) { float bright = FVector3(lr, lg, lb).Length(); FVector3 lightColor(lr, lg, lb); lr = (bright - lr) * -1; lg = (bright - lg) * -1; lb = (bright - lb) * -1; } out[0] += lr * frac; out[1] += lg * frac; out[2] += lb * frac; changed = true; } } } } node = node->nextLight; } } // Desaturate dynamic lighting if applicable if (desaturation>0 && desaturation<=CM_DESAT31) { float gray=(out[0]*77 + out[1]*143 + out[2]*37)/257; out[0]= (out[0]*(31-desaturation)+ gray*desaturation)/31; out[1]= (out[1]*(31-desaturation)+ gray*desaturation)/31; out[2]= (out[2]*(31-desaturation)+ gray*desaturation)/31; } return changed; } //========================================================================== // // Sets the light for a sprite - takes dynamic lights into account // //========================================================================== static int gl_SetSpriteLight(AActor *self, fixed_t x, fixed_t y, fixed_t z, subsector_t * subsec, int lightlevel, int rellight, FColormap * cm, float alpha, PalEntry ThingColor, bool weapon) { float r,g,b; float result[4]; // Korshun. gl_GetLightColor(lightlevel, rellight, cm, &r, &g, &b, weapon); bool res = gl_GetSpriteLight(self, x, y, z, subsec, cm? cm->colormap : 0, result); if (!res || glset.lightmode == 8) { r *= ThingColor.r/255.f; g *= ThingColor.g/255.f; b *= ThingColor.b/255.f; glColor4f(r, g, b, alpha); if (glset.lightmode == 8) { glVertexAttrib1f(VATTR_LIGHTLEVEL, gl_CalcLightLevel(lightlevel, rellight, weapon) / 255.0f); // Korshun. gl_RenderState.SetDynLight(result[0], result[1], result[2]); } return lightlevel; } else { // Note: Due to subtractive lights the values can easily become negative so we have to clamp both // at the low and top end of the range! r = clamp(result[0]+r, 0, 1.0f); g = clamp(result[1]+g, 0, 1.0f); b = clamp(result[2]+b, 0, 1.0f); float dlightlevel = r*77 + g*143 + b*35; r *= ThingColor.r/255.f; g *= ThingColor.g/255.f; b *= ThingColor.b/255.f; glColor4f(r, g, b, alpha); if (dlightlevel == 0) return 0; if (glset.lightmode&2 && dlightlevel<192.f) { return xs_CRoundToInt(192.f - (192.f - dlightlevel) / 1.95f); } else { return xs_CRoundToInt(dlightlevel); } } } int gl_SetSpriteLight(AActor * thing, int lightlevel, int rellight, FColormap * cm, float alpha, PalEntry ThingColor, bool weapon) { subsector_t * subsec = thing->subsector; return gl_SetSpriteLight(thing, thing->x, thing->y, thing->z+(thing->height>>1), subsec, lightlevel, rellight, cm, alpha, ThingColor, weapon); } int gl_SetSpriteLight(particle_t * thing, int lightlevel, int rellight, FColormap *cm, float alpha, PalEntry ThingColor) { return gl_SetSpriteLight(NULL, thing->x, thing->y, thing->z, thing->subsector, lightlevel, rellight, cm, alpha, ThingColor, false); } //========================================================================== // // Modifies the color values depending on the render style // //========================================================================== void gl_GetSpriteLighting(FRenderStyle style, AActor *thing, FColormap *cm, PalEntry &ThingColor) { if (style.Flags & STYLEF_RedIsAlpha) { cm->colormap = CM_SHADE; } if (style.Flags & STYLEF_ColorIsFixed) { if (style.Flags & STYLEF_InvertSource) { ThingColor = PalEntry(thing->fillcolor).InverseColor(); } else { ThingColor = thing->fillcolor; } } // This doesn't work like in the software renderer. if (style.Flags & STYLEF_InvertSource) { int gray = (cm->LightColor.r*77 + cm->LightColor.r*143 + cm->LightColor.r*36)>>8; cm->LightColor.r = cm->LightColor.g = cm->LightColor.b = gray; } } //========================================================================== // // Sets render state to draw the given render style // //========================================================================== int gl_SetSpriteLighting(FRenderStyle style, AActor *thing, int lightlevel, int rellight, FColormap *cm, PalEntry ThingColor, float alpha, bool fullbright, bool weapon) { FColormap internal_cm; if (style.Flags & STYLEF_RedIsAlpha) { cm->colormap = CM_SHADE; } if (style.Flags & STYLEF_ColorIsFixed) { if (style.Flags & STYLEF_InvertSource) { ThingColor = PalEntry(thing->fillcolor).InverseColor(); } else { ThingColor = thing->fillcolor; } gl_ModifyColor(ThingColor.r, ThingColor.g, ThingColor.b, cm->colormap); } // This doesn't work like in the software renderer. if (style.Flags & STYLEF_InvertSource) { internal_cm = *cm; cm = &internal_cm; int gray = (internal_cm.LightColor.r*77 + internal_cm.LightColor.r*143 + internal_cm.LightColor.r*36)>>8; cm->LightColor.r = cm->LightColor.g = cm->LightColor.b = gray; } if (style.BlendOp == STYLEOP_Shadow) { glColor4f(0.2f * ThingColor.r / 255.f, 0.2f * ThingColor.g / 255.f, 0.2f * ThingColor.b / 255.f, (alpha = 0.33f)); } else { if (gl_light_sprites && gl_lights && GLRenderer->mLightCount && !fullbright) { lightlevel = gl_SetSpriteLight(thing, lightlevel, rellight, cm, alpha, ThingColor, weapon); } else { gl_SetColor(lightlevel, rellight, cm, alpha, ThingColor, weapon); } } gl_RenderState.AlphaFunc(GL_GEQUAL,alpha*gl_mask_sprite_threshold); return lightlevel; }