/* ** v_blend.cpp ** Screen blending stuff ** **--------------------------------------------------------------------------- ** Copyright 1998-2006 Randy Heit ** 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. ** ** 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 #include "templates.h" #include "sbar.h" #include "c_cvars.h" #include "c_dispatch.h" #include "v_video.h" #include "s_sound.h" #include "gi.h" #include "d_player.h" #include "g_levellocals.h" CVAR( Float, blood_fade_scalar, 1.0f, CVAR_ARCHIVE ) // [SP] Pulled from Skulltag - changed default from 0.5 to 1.0 CVAR( Float, pickup_fade_scalar, 1.0f, CVAR_ARCHIVE ) // [SP] Uses same logic as blood_fade_scalar except for pickups // [RH] Amount of red flash for up to 114 damage points. Calculated by hand // using a logarithmic scale and my trusty HP48G. static uint8_t DamageToAlpha[114] = { 0, 8, 16, 23, 30, 36, 42, 47, 53, 58, 62, 67, 71, 75, 79, 83, 87, 90, 94, 97, 100, 103, 107, 109, 112, 115, 118, 120, 123, 125, 128, 130, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 160, 162, 164, 165, 167, 169, 170, 172, 173, 175, 176, 178, 179, 181, 182, 183, 185, 186, 187, 189, 190, 191, 192, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 221, 222, 223, 224, 225, 226, 227, 228, 229, 229, 230, 231, 232, 233, 234, 235, 235, 236, 237 }; /* ============= SV_AddBlend [RH] This is from Q2. ============= */ void V_AddBlend (float r, float g, float b, float a, float v_blend[4]) { float a2, a3; if (a <= 0) return; a2 = v_blend[3] + (1-v_blend[3])*a; // new total alpha a3 = v_blend[3]/a2; // fraction of color from old v_blend[0] = v_blend[0]*a3 + r*(1-a3); v_blend[1] = v_blend[1]*a3 + g*(1-a3); v_blend[2] = v_blend[2]*a3 + b*(1-a3); v_blend[3] = a2; } //--------------------------------------------------------------------------- // // BlendView // //--------------------------------------------------------------------------- void V_AddPlayerBlend (player_t *CPlayer, float blend[4], float maxinvalpha, int maxpainblend) { int cnt; // [RH] All powerups can affect the screen blending now for (AInventory *item = CPlayer->mo->Inventory; item != NULL; item = item->Inventory) { PalEntry color = item->CallGetBlend (); if (color.a != 0) { V_AddBlend (color.r/255.f, color.g/255.f, color.b/255.f, color.a/255.f, blend); if (color.a/255.f > maxinvalpha) maxinvalpha = color.a/255.f; } } if (CPlayer->bonuscount) { cnt = CPlayer->bonuscount << 3; // [SP] Allow player to tone down intensity of pickup flash. cnt = (int)( cnt * pickup_fade_scalar ); V_AddBlend (RPART(gameinfo.pickupcolor)/255.f, GPART(gameinfo.pickupcolor)/255.f, BPART(gameinfo.pickupcolor)/255.f, cnt > 128 ? 0.5f : cnt / 255.f, blend); } PalEntry painFlash = CPlayer->mo->DamageFade; CPlayer->GetPainFlash(CPlayer->mo->DamageTypeReceived, &painFlash); if (painFlash.a != 0) { cnt = DamageToAlpha[MIN (113, CPlayer->damagecount * painFlash.a / 255)]; // [BC] Allow users to tone down the intensity of the blood on the screen. cnt = (int)( cnt * blood_fade_scalar ); if (cnt) { if (cnt > maxpainblend) cnt = maxpainblend; V_AddBlend (painFlash.r / 255.f, painFlash.g / 255.f, painFlash.b / 255.f, cnt / 255.f, blend); } } // Unlike Doom, I did not have any utility source to look at to find the // exact numbers to use here, so I've had to guess by looking at how they // affect the white color in Hexen's palette and picking an alpha value // that seems reasonable. // [Gez] The exact values could be obtained by looking how they affect // each color channel in Hexen's palette. if (CPlayer->poisoncount) { cnt = MIN (CPlayer->poisoncount, 64); if (paletteflash & PF_POISON) { V_AddBlend(44/255.f, 92/255.f, 36/255.f, ((cnt + 7) >> 3) * 0.1f, blend); } else { V_AddBlend (0.04f, 0.2571f, 0.f, cnt/93.2571428571f, blend); } } if (CPlayer->hazardcount) { if (paletteflash & PF_HAZARD) { if (CPlayer->hazardcount > 16*TICRATE || (CPlayer->hazardcount & 8)) { float r = ((level.hazardflash & 0xff0000) >> 16) / 255.f; float g = ((level.hazardflash & 0xff00) >> 8) / 255.f; float b = ((level.hazardflash & 0xff)) / 255.f; V_AddBlend (r, g, b, 0.125f, blend); } } else { cnt= MIN(CPlayer->hazardcount/8, 64); float r = ((level.hazardcolor & 0xff0000) >> 16) / 255.f; float g = ((level.hazardcolor & 0xff00) >> 8) / 255.f; float b = ((level.hazardcolor & 0xff)) / 255.f; V_AddBlend (r, g, b, cnt/93.2571428571f, blend); } } if (CPlayer->mo->DamageType == NAME_Ice) { if (paletteflash & PF_ICE) { V_AddBlend(0.f, 0.f, 224/255.f, 0.5f, blend); } else { V_AddBlend (0.25f, 0.25f, 0.853f, 0.4f, blend); } } // cap opacity if desired if (blend[3] > maxinvalpha) blend[3] = maxinvalpha; }