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qvr/app/jni/r_sky.c
Simon 90d0c76d59 Initial Commit of Source
2016-01-29 22:43:55 +00:00

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#include "quakedef.h"
#include "image.h"
// FIXME: fix skybox after vid_restart
cvar_t r_sky = {CVAR_SAVE, "r_sky", "1", "enables sky rendering (black otherwise)"};
cvar_t r_skyscroll1 = {CVAR_SAVE, "r_skyscroll1", "1", "speed at which upper clouds layer scrolls in quake sky"};
cvar_t r_skyscroll2 = {CVAR_SAVE, "r_skyscroll2", "2", "speed at which lower clouds layer scrolls in quake sky"};
int skyrenderlater;
int skyrendermasked;
static int skyrendersphere;
static int skyrenderbox;
static rtexturepool_t *skytexturepool;
static char skyname[MAX_QPATH];
static matrix4x4_t skymatrix;
static matrix4x4_t skyinversematrix;
typedef struct suffixinfo_s
{
const char *suffix;
qboolean flipx, flipy, flipdiagonal;
}
suffixinfo_t;
static const suffixinfo_t suffix[3][6] =
{
{
{"px", false, false, false},
{"nx", false, false, false},
{"py", false, false, false},
{"ny", false, false, false},
{"pz", false, false, false},
{"nz", false, false, false}
},
{
{"posx", false, false, false},
{"negx", false, false, false},
{"posy", false, false, false},
{"negy", false, false, false},
{"posz", false, false, false},
{"negz", false, false, false}
},
{
{"rt", false, false, true},
{"lf", true, true, true},
{"bk", false, true, false},
{"ft", true, false, false},
{"up", false, false, true},
{"dn", false, false, true}
}
};
static skinframe_t *skyboxskinframe[6];
void R_SkyStartFrame(void)
{
skyrendersphere = false;
skyrenderbox = false;
skyrendermasked = false;
// for depth-masked sky, we need to know whether any sky was rendered
skyrenderlater = false;
if (r_sky.integer)
{
if (skyboxskinframe[0] || skyboxskinframe[1] || skyboxskinframe[2] || skyboxskinframe[3] || skyboxskinframe[4] || skyboxskinframe[5])
skyrenderbox = true;
else if (r_refdef.scene.worldmodel && r_refdef.scene.worldmodel->brush.solidskyskinframe)
skyrendersphere = true;
skyrendermasked = true;
}
}
/*
==================
R_SetSkyBox
==================
*/
static void R_UnloadSkyBox(void)
{
int i;
int c = 0;
for (i = 0;i < 6;i++)
{
if (skyboxskinframe[i])
{
// TODO: make a R_SkinFrame_Purge for single skins...
c++;
}
skyboxskinframe[i] = NULL;
}
if (c && developer_loading.integer)
Con_Printf("unloading skybox\n");
}
static int R_LoadSkyBox(void)
{
int i, j, success;
int indices[4] = {0,1,2,3};
char name[MAX_INPUTLINE];
unsigned char *image_buffer;
unsigned char *temp;
char vabuf[1024];
R_UnloadSkyBox();
if (!skyname[0])
return true;
for (j=0; j<3; j++)
{
success = 0;
for (i=0; i<6; i++)
{
if (dpsnprintf(name, sizeof(name), "%s_%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
{
if (dpsnprintf(name, sizeof(name), "%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
{
if (dpsnprintf(name, sizeof(name), "env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
{
if (dpsnprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
continue;
}
}
}
temp = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
Image_CopyMux (temp, image_buffer, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
skyboxskinframe[i] = R_SkinFrame_LoadInternalBGRA(va(vabuf, sizeof(vabuf), "skyboxside%d", i), TEXF_CLAMP | (gl_texturecompression_sky.integer ? TEXF_COMPRESS : 0), temp, image_width, image_height, vid.sRGB3D);
Mem_Free(image_buffer);
Mem_Free(temp);
success++;
}
if (success)
break;
}
if (j == 3)
return false;
if (developer_loading.integer)
Con_Printf("loading skybox \"%s\"\n", name);
return true;
}
int R_SetSkyBox(const char *sky)
{
if (strcmp(sky, skyname) == 0) // no change
return true;
if (strlen(sky) > 1000)
{
Con_Printf("sky name too long (%i, max is 1000)\n", (int)strlen(sky));
return false;
}
strlcpy(skyname, sky, sizeof(skyname));
return R_LoadSkyBox();
}
// LordHavoc: added LoadSky console command
static void LoadSky_f (void)
{
switch (Cmd_Argc())
{
case 1:
if (skyname[0])
Con_Printf("current sky: %s\n", skyname);
else
Con_Print("no skybox has been set\n");
break;
case 2:
if (R_SetSkyBox(Cmd_Argv(1)))
{
if (skyname[0])
Con_Printf("skybox set to %s\n", skyname);
else
Con_Print("skybox disabled\n");
}
else
Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
break;
default:
Con_Print("usage: loadsky skyname\n");
break;
}
}
static const float skyboxvertex3f[6*4*3] =
{
// skyside[0]
16, -16, 16,
16, -16, -16,
16, 16, -16,
16, 16, 16,
// skyside[1]
-16, 16, 16,
-16, 16, -16,
-16, -16, -16,
-16, -16, 16,
// skyside[2]
16, 16, 16,
16, 16, -16,
-16, 16, -16,
-16, 16, 16,
// skyside[3]
-16, -16, 16,
-16, -16, -16,
16, -16, -16,
16, -16, 16,
// skyside[4]
-16, -16, 16,
16, -16, 16,
16, 16, 16,
-16, 16, 16,
// skyside[5]
16, -16, -16,
-16, -16, -16,
-16, 16, -16,
16, 16, -16
};
static const float skyboxtexcoord2f[6*4*2] =
{
// skyside[0]
0, 1,
1, 1,
1, 0,
0, 0,
// skyside[1]
1, 0,
0, 0,
0, 1,
1, 1,
// skyside[2]
1, 1,
1, 0,
0, 0,
0, 1,
// skyside[3]
0, 0,
0, 1,
1, 1,
1, 0,
// skyside[4]
0, 1,
1, 1,
1, 0,
0, 0,
// skyside[5]
0, 1,
1, 1,
1, 0,
0, 0
};
static const int skyboxelement3i[6*2*3] =
{
// skyside[3]
0, 1, 2,
0, 2, 3,
// skyside[1]
4, 5, 6,
4, 6, 7,
// skyside[0]
8, 9, 10,
8, 10, 11,
// skyside[2]
12, 13, 14,
12, 14, 15,
// skyside[4]
16, 17, 18,
16, 18, 19,
// skyside[5]
20, 21, 22,
20, 22, 23
};
static const unsigned short skyboxelement3s[6*2*3] =
{
// skyside[3]
0, 1, 2,
0, 2, 3,
// skyside[1]
4, 5, 6,
4, 6, 7,
// skyside[0]
8, 9, 10,
8, 10, 11,
// skyside[2]
12, 13, 14,
12, 14, 15,
// skyside[4]
16, 17, 18,
16, 18, 19,
// skyside[5]
20, 21, 22,
20, 22, 23
};
static void R_SkyBox(void)
{
int i;
RSurf_ActiveCustomEntity(&skymatrix, &skyinversematrix, 0, 0, 1, 1, 1, 1, 6*4, skyboxvertex3f, skyboxtexcoord2f, NULL, NULL, NULL, NULL, 6*2, skyboxelement3i, skyboxelement3s, false, false);
for (i = 0;i < 6;i++)
if(skyboxskinframe[i])
R_DrawCustomSurface(skyboxskinframe[i], &identitymatrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST, i*4, 4, i*2, 2, false, false);
}
#define skygridx 32
#define skygridx1 (skygridx + 1)
#define skygridxrecip (1.0f / (skygridx))
#define skygridy 32
#define skygridy1 (skygridy + 1)
#define skygridyrecip (1.0f / (skygridy))
#define skysphere_numverts (skygridx1 * skygridy1)
#define skysphere_numtriangles (skygridx * skygridy * 2)
static float skysphere_vertex3f[skysphere_numverts * 3];
static float skysphere_texcoord2f[skysphere_numverts * 2];
static int skysphere_element3i[skysphere_numtriangles * 3];
static unsigned short skysphere_element3s[skysphere_numtriangles * 3];
static void skyspherecalc(void)
{
int i, j;
unsigned short *e;
float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
float dx, dy, dz;
dx = 16.0f;
dy = 16.0f;
dz = 16.0f / 3.0f;
vertex3f = skysphere_vertex3f;
texcoord2f = skysphere_texcoord2f;
for (j = 0;j <= skygridy;j++)
{
a = j * skygridyrecip;
ax = cos(a * M_PI * 2);
ay = -sin(a * M_PI * 2);
for (i = 0;i <= skygridx;i++)
{
b = i * skygridxrecip;
x = cos((b + 0.5) * M_PI);
v[0] = ax*x * dx;
v[1] = ay*x * dy;
v[2] = -sin((b + 0.5) * M_PI) * dz;
length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
*texcoord2f++ = v[0] * length;
*texcoord2f++ = v[1] * length;
*vertex3f++ = v[0];
*vertex3f++ = v[1];
*vertex3f++ = v[2];
}
}
e = skysphere_element3s;
for (j = 0;j < skygridy;j++)
{
for (i = 0;i < skygridx;i++)
{
*e++ = j * skygridx1 + i;
*e++ = j * skygridx1 + i + 1;
*e++ = (j + 1) * skygridx1 + i;
*e++ = j * skygridx1 + i + 1;
*e++ = (j + 1) * skygridx1 + i + 1;
*e++ = (j + 1) * skygridx1 + i;
}
}
for (i = 0;i < skysphere_numtriangles*3;i++)
skysphere_element3i[i] = skysphere_element3s[i];
}
static void R_SkySphere(void)
{
double speedscale;
static qboolean skysphereinitialized = false;
matrix4x4_t scroll1matrix, scroll2matrix;
if (!skysphereinitialized)
{
skysphereinitialized = true;
skyspherecalc();
}
// wrap the scroll values just to be extra kind to float accuracy
// scroll speed for upper layer
speedscale = r_refdef.scene.time*r_skyscroll1.value*8.0/128.0;
speedscale -= floor(speedscale);
Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
// scroll speed for lower layer (transparent layer)
speedscale = r_refdef.scene.time*r_skyscroll2.value*8.0/128.0;
speedscale -= floor(speedscale);
Matrix4x4_CreateTranslate(&scroll2matrix, speedscale, speedscale, 0);
RSurf_ActiveCustomEntity(&skymatrix, &skyinversematrix, 0, 0, 1, 1, 1, 1, skysphere_numverts, skysphere_vertex3f, skysphere_texcoord2f, NULL, NULL, NULL, NULL, skysphere_numtriangles, skysphere_element3i, skysphere_element3s, false, false);
R_DrawCustomSurface(r_refdef.scene.worldmodel->brush.solidskyskinframe, &scroll1matrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST , 0, skysphere_numverts, 0, skysphere_numtriangles, false, false);
R_DrawCustomSurface(r_refdef.scene.worldmodel->brush.alphaskyskinframe, &scroll2matrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST | MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED, 0, skysphere_numverts, 0, skysphere_numtriangles, false, false);
}
void R_Sky(void)
{
Matrix4x4_CreateFromQuakeEntity(&skymatrix, r_refdef.view.origin[0], r_refdef.view.origin[1], r_refdef.view.origin[2], 0, 0, 0, r_refdef.farclip * (0.5f / 16.0f));
Matrix4x4_Invert_Simple(&skyinversematrix, &skymatrix);
if (skyrendersphere)
{
// this does not modify depth buffer
R_SkySphere();
}
else if (skyrenderbox)
{
// this does not modify depth buffer
R_SkyBox();
}
/* this will be skyroom someday
else
{
// this modifies the depth buffer so we have to clear it afterward
//R_SkyRoom();
// clear the depthbuffer that was used while rendering the skyroom
//GL_Clear(GL_DEPTH_BUFFER_BIT);
}
*/
}
//===============================================================
void R_ResetSkyBox(void)
{
R_UnloadSkyBox();
skyname[0] = 0;
R_LoadSkyBox();
}
static void r_sky_start(void)
{
skytexturepool = R_AllocTexturePool();
R_LoadSkyBox();
}
static void r_sky_shutdown(void)
{
R_UnloadSkyBox();
R_FreeTexturePool(&skytexturepool);
}
static void r_sky_newmap(void)
{
}
void R_Sky_Init(void)
{
Cmd_AddCommand ("loadsky", &LoadSky_f, "load a skybox by basename (for example loadsky mtnsun_ loads mtnsun_ft.tga and so on)");
Cvar_RegisterVariable (&r_sky);
Cvar_RegisterVariable (&r_skyscroll1);
Cvar_RegisterVariable (&r_skyscroll2);
memset(&skyboxskinframe, 0, sizeof(skyboxskinframe));
skyname[0] = 0;
R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap, NULL, NULL);
}
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