ref: f64250f9c3b1376064cd214c36064044c98b117e
dir: /r_fog.c/
#include "quakedef.h" static cvar_t r_fog = {"r_fog", "1", true}; static cvar_t r_skyfog = {"r_skyfog", "0.5"}; fogvars_t fogvars; static void fogrecalc(void) { fogvars.pix = (fogvars.allowed && fogvars.enabled) ? 0xff<<24 | fogvars.c2<<16 | fogvars.c1<<8 | fogvars.c0 : 0; fogvars.skypix = mulalpha(fogvars.pix, 255 * clamp(r_skyfog.value, 0.0, 1.0)); } static void r_skyfog_cb(cvar_t *var) { USED(var); fogrecalc(); } static void fog(void) { int i, n; float x; char *s; i = 1; n = Cmd_Argc(); switch(n){ case 5: case 2: x = atof(Cmd_Argv(i++)); if(n == 2 && strncmp(s = Cmd_Argv(0), "gl_fog", 6) == 0 && s[6] != 'd'){ // Nehahra x = 255 * clamp(x, 0.0, 1.0); if(s[6] == 'r') fogvars.c2 = x; else if(s[6] == 'g') fogvars.c1 = x; else if(s[6] == 'b') fogvars.c0 = x; else if(s[6] == 'e'){ fogvars.enabled = x > 0; setcvar("r_skyfog", x > 0 ? "1" : "0"); } break; } fogvars.density = clamp(x, 0.0, 1.0) * 0.016; fogvars.density *= fogvars.density; fogvars.enabled = fogvars.density > 0.0; if(n == 2) break; case 4: x = atof(Cmd_Argv(i++)); fogvars.c2 = 0xff * clamp(x, 0.0, 1.0); x = atof(Cmd_Argv(i++)); fogvars.c1 = 0xff * clamp(x, 0.0, 1.0); x = atof(Cmd_Argv(i)); fogvars.c0 = 0xff * clamp(x, 0.0, 1.0); r_skyfog_cb(&r_skyfog); /* recalculate sky fog */ break; } fogrecalc(); } void R_ResetFog(void) { memset(&fogvars, 0, sizeof(fogvars)); fogvars.c2 = fogvars.c1 = fogvars.c0 = 0x80; fogvars.allowed = r_fog.value > 0.0; setcvar("r_skyfog", "0"); // calls fogrecalc } static void r_fog_cb(cvar_t *var) { fogvars.allowed = var->value > 0.0; fogrecalc(); } void R_InitFog(void) { r_fog.cb = r_fog_cb; r_skyfog.cb = r_skyfog_cb; Cmd_AddCommand("fog", fog); Cvar_RegisterVariable(&r_fog); Cvar_RegisterVariable(&r_skyfog); // Nehahra Cmd_AddCommand("gl_fogenable", fog)->hidden = true; Cmd_AddCommand("gl_fogdensity", fog)->hidden = true; Cmd_AddCommand("gl_fogred", fog)->hidden = true; Cmd_AddCommand("gl_foggreen", fog)->hidden = true; Cmd_AddCommand("gl_fogblue", fog)->hidden = true; }