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/*
Copyright (C) 1997-2001 Id Software, Inc.
Copyright (C) 2008 Andrey Nazarov
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "sw.h"
//static float sky_rotate;
//static vec3_t sky_axis;
static int r_skyframe;
static mface_t r_skyfaces[6];
static cplane_t r_skyplanes[6];
static mtexinfo_t r_skytexinfo[6];
static mvertex_t r_skyverts[8];
static medge_t r_skyedges[12];
static msurfedge_t r_skysurfedges[24];
// 3dstudio environment map names
static const char r_skysidenames[6][3] = { "rt", "bk", "lf", "ft", "up", "dn" };
static const int r_skysideimage[6] = { 5, 2, 4, 1, 0, 3 };
// I just copied this data from a box map...
static const int box_planes[12] = {
2, -128, 0, -128, 2, 128, 1, 128, 0, 128, 1, -128
};
static const int box_surfedges[24] = {
1, 2, 3, 4, 1, 5, 6, 7, 8, 9, 6, 10, 2, 7, 9, 11, 12, 3, 11, 8, 12, 10, 5, 4
};
static const int box_surfverts[24] = {
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1
};
static const int box_edges[24] = {
1, 2, 2, 3, 3, 4, 4, 1, 1, 5, 5, 6, 6, 2, 7, 8, 8, 6, 5, 7, 8, 3, 7, 4
};
static const int box_flags[6] = {
0, 0, 1, 1, 1, 0
};
static const vec3_t box_axis[6][2] = {
{ {0, -1, 0}, { -1, 0, 0} },
{ {0, 1, 0}, {0, 0, -1} },
{ {0, -1, 0}, {1, 0, 0} },
{ {1, 0, 0}, {0, 0, -1} },
{ {0, -1, 0}, {0, 0, -1} },
{ { -1, 0, 0}, {0, 0, -1} }
};
static const vec3_t box_verts[8] = {
{ -1, -1, -1},
{ -1, 1, -1},
{1, 1, -1},
{1, -1, -1},
{ -1, -1, 1},
{ -1, 1, 1},
{1, -1, 1},
{1, 1, 1}
};
/*
================
R_InitSkyBox
================
*/
void R_InitSkyBox(void)
{
int i;
for (i = 0; i < 6; i++) {
r_skyplanes[i].normal[box_planes[i * 2]] = 1;
r_skyplanes[i].dist = box_planes[i * 2 + 1];
VectorCopy(box_axis[i][0], r_skytexinfo[i].axis[0]);
VectorCopy(box_axis[i][1], r_skytexinfo[i].axis[1]);
r_skyfaces[i].plane = &r_skyplanes[i];
r_skyfaces[i].drawflags = box_flags[i] | DSURF_SKY;
r_skyfaces[i].numsurfedges = 4;
r_skyfaces[i].firstsurfedge = &r_skysurfedges[i * 4];
r_skyfaces[i].texinfo = &r_skytexinfo[i];
r_skyfaces[i].texturemins[0] = -128;
r_skyfaces[i].texturemins[1] = -128;
r_skyfaces[i].extents[0] = 256;
r_skyfaces[i].extents[1] = 256;
}
for (i = 0; i < 24; i++) {
r_skysurfedges[i].edge = &r_skyedges[box_surfedges[i] - 1];
r_skysurfedges[i].vert = box_surfverts[i];
}
for (i = 0; i < 12; i++) {
r_skyedges[i].v[0] = &r_skyverts[box_edges[i * 2 + 0] - 1];
r_skyedges[i].v[1] = &r_skyverts[box_edges[i * 2 + 1] - 1];
r_skyedges[i].cachededgeoffset = 0;
}
}
/*
================
R_EmitSkyBox
================
*/
void R_EmitSkyBox(void)
{
int i, j;
int oldkey;
if (insubmodel)
return; // submodels should never have skies
if (r_skyframe == r_framecount)
return; // already set this frame
r_skyframe = r_framecount;
// set the eight fake vertexes
for (i = 0; i < 8; i++)
for (j = 0; j < 3; j++)
r_skyverts[i].point[j] = r_origin[j] + box_verts[i][j] * 128;
// set the six fake planes
for (i = 0; i < 6; i++)
if (box_planes[i * 2 + 1] > 0)
r_skyplanes[i].dist = r_origin[box_planes[i * 2]] + 128;
else
r_skyplanes[i].dist = r_origin[box_planes[i * 2]] - 128;
// fix texture offsets
for (i = 0; i < 6; i++) {
r_skytexinfo[i].offset[0] = -DotProduct(r_origin, r_skytexinfo[i].axis[0]);
r_skytexinfo[i].offset[1] = -DotProduct(r_origin, r_skytexinfo[i].axis[1]);
}
// emit the six faces
oldkey = r_currentkey;
r_currentkey = 0x7ffffff0;
for (i = 0; i < 6; i++) {
R_RenderFace(&r_skyfaces[i], 15);
}
r_currentkey = oldkey; // bsp sorting order
}
/*
============
R_SetSky
============
*/
void R_SetSky(const char *name, float rotate, vec3_t axis)
{
int i;
char path[MAX_QPATH];
// sky_rotate = rotate;
// VectorCopy(axis, sky_axis);
for (i = 0; i < 6; i++) {
Q_concat(path, sizeof(path), "env/", name,
r_skysidenames[r_skysideimage[i]], ".tga", NULL);
FS_NormalizePath(path, path);
r_skytexinfo[i].image = IMG_Find(path, IT_SKY, IF_NONE);
}
}
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