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very close to having working slipped skybox. framed box faces now work, but not

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the surrounding faces within the frame. (frame = sky poly surrounding the face)
Also, faces with only to vertexes from clipping don't work yet.
This commit is contained in:
Bill Currie 2000-11-15 06:00:29 +00:00
parent 619cb49fca
commit d616ad745f
1 changed files with 62 additions and 35 deletions
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97
source/gl_sky.c
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@ -353,36 +353,42 @@ find_intersect (int face1, vec3_t x1, int face2, vec3_t x2, vec3_t y)
VectorSubtract (x, t, y);
}
struct box_def {
int tex, enter, leave;
glpoly_t poly;
float verts[32][VERTEXSIZE];
};
static void
set_vertex (glpoly_t *p, vec3_t v, int face)
set_vertex (struct box_def *box, vec3_t v, int face)
{
int ind = p->numverts++;
VectorCopy (v, p->verts[ind]);
VectorAdd (v, r_refdef.vieworg, p->verts[ind]);
int ind = box[face].poly.numverts++;
VectorCopy (v, box[face].poly.verts[ind]);
VectorAdd (v, r_refdef.vieworg, box[face].poly.verts[ind]);
switch (face) {
case 0:
p->verts[ind][3] = (1024 - v[1]) / 2048;
p->verts[ind][4] = (1024 - v[2]) / 2048;
box[face].poly.verts[ind][3] = (1024 - v[1]) / 2048;
box[face].poly.verts[ind][4] = (1024 - v[2]) / 2048;
break;
case 1:
p->verts[ind][3] = (1024 + v[0]) / 2048;
p->verts[ind][4] = (1024 - v[2]) / 2048;
box[face].poly.verts[ind][3] = (1024 + v[0]) / 2048;
box[face].poly.verts[ind][4] = (1024 - v[2]) / 2048;
break;
case 2:
p->verts[ind][3] = (1024 + v[0]) / 2048;
p->verts[ind][4] = (1024 + v[1]) / 2048;
box[face].poly.verts[ind][3] = (1024 + v[0]) / 2048;
box[face].poly.verts[ind][4] = (1024 + v[1]) / 2048;
break;
case 3:
p->verts[ind][3] = (1024 + v[1]) / 2048;
p->verts[ind][4] = (1024 - v[2]) / 2048;
box[face].poly.verts[ind][3] = (1024 + v[1]) / 2048;
box[face].poly.verts[ind][4] = (1024 - v[2]) / 2048;
break;
case 4:
p->verts[ind][3] = (1024 - v[0]) / 2048;
p->verts[ind][4] = (1024 - v[2]) / 2048;
box[face].poly.verts[ind][3] = (1024 - v[0]) / 2048;
box[face].poly.verts[ind][4] = (1024 - v[2]) / 2048;
break;
case 5:
p->verts[ind][3] = (1024 - v[0]) / 2048;
p->verts[ind][4] = (1024 - v[1]) / 2048;
box[face].poly.verts[ind][3] = (1024 - v[0]) / 2048;
box[face].poly.verts[ind][4] = (1024 - v[1]) / 2048;
break;
}
}
@ -402,19 +408,13 @@ find_cube_vertex (int face1, int face2, int face3, vec3_t v)
v[face3 % 3] = 1024 * (1 - 2 * (face3 / 3));
}
struct box_def {
int tex, enter, leave;
glpoly_t poly;
float verts[32][VERTEXSIZE];
};
static void
enter_face (struct box_def *box, int prev_face, int face)
{
if (box[face].leave >=0 && (box[face].leave % 3) != (prev_face % 3)) {
vec3_t t;
find_cube_vertex (prev_face, face, box[face].leave, t);
set_vertex(&box[face].poly, t, face);
set_vertex(box, t, face);
box[face].enter = -1;
} else {
box[face].enter = prev_face;
@ -428,7 +428,7 @@ leave_face (struct box_def *box, int prev_face, int face)
if (box[prev_face].enter >=0 && (box[prev_face].enter) % 3 != (face % 3)) {
vec3_t t;
find_cube_vertex (prev_face, face, box[prev_face].enter, t);
set_vertex(&box[prev_face].poly, t, prev_face);
set_vertex(box, t, prev_face);
box[prev_face].leave = -1;
} else {
box[prev_face].leave = face;
@ -459,9 +459,10 @@ R_DrawSkyBoxPoly (glpoly_t *poly)
{
static int skytex_offs[] = {3, 0, 4, 1, 2, 5};
vec3_t v, last_v;
vec3_t center = {0, 0, 0};
struct box_def box[6];
int i;
int face, prev_face;
int face, prev_face, c_face;
memset (box, 0, sizeof (box));
for (i = 0; i < 6; i++) {
@ -474,6 +475,13 @@ R_DrawSkyBoxPoly (glpoly_t *poly)
abort();
}
for (i = 0; i < poly->numverts; i++) {
VectorAdd (poly->verts[i], center, center);
VectorSubtract (center, r_refdef.vieworg, center);
}
VectorScale (center, 1.0/poly->numverts, center);
c_face = determine_face (center);
VectorSubtract (poly->verts[poly->numverts - 1], r_refdef.vieworg, v);
prev_face = determine_face (v);
VectorCopy (v, last_v);
@ -482,43 +490,62 @@ R_DrawSkyBoxPoly (glpoly_t *poly)
VectorSubtract (poly->verts[i], r_refdef.vieworg, v);
face = determine_face (v);
if (face != prev_face) {
if (face % 3 == prev_face % 3) {
if ((face % 3) == (prev_face % 3)) {
vec3_t l, x;
int x_face;
VectorSubtract (v, last_v, x);
VectorAdd (v, last_v, x);
VectorScale (x, 0.5, x);
VectorAdd (last_v, x, x);
x_face = determine_face (x);
find_intersect (prev_face, last_v, x_face, v, l);
set_vertex(&box[prev_face].poly, l, prev_face);
set_vertex(box, l, prev_face);
leave_face (box, prev_face, x_face);
//enter_face (box, prev_face, x_face);
enter_face (box, prev_face, x_face);
find_intersect (x_face, last_v, face, v, l);
//leave_face (box, x_face, face);
leave_face (box, x_face, face);
enter_face (box, x_face, face);
set_vertex(&box[face].poly, l, face);
set_vertex(box, l, face);
} else {
vec3_t l;
find_intersect (prev_face, last_v, face, v, l);
set_vertex(&box[prev_face].poly, l, prev_face);
set_vertex(box, l, prev_face);
leave_face (box, prev_face, face);
enter_face (box, prev_face, face);
set_vertex(&box[face].poly, l, face);
set_vertex(box, l, face);
}
}
set_vertex(&box[face].poly, v, face);
set_vertex(box, v, face);
VectorCopy (v, last_v);
prev_face = face;
}
if (box[c_face].poly.numverts == 0) {
vec3_t v;
find_cube_vertex (c_face, c_face + 1, c_face + 2, v);
set_vertex(box, v, c_face);
set_vertex(box, v, (c_face + 1) % 6);
set_vertex(box, v, (c_face + 2) % 6);
find_cube_vertex (c_face, c_face + 2, c_face + 4, v);
set_vertex(box, v, c_face);
set_vertex(box, v, (c_face + 2) % 6);
set_vertex(box, v, (c_face + 4) % 6);
find_cube_vertex (c_face, c_face + 4, c_face + 5, v);
set_vertex(box, v, c_face);
set_vertex(box, v, (c_face + 4) % 6);
set_vertex(box, v, (c_face + 5) % 6);
find_cube_vertex (c_face, c_face + 5, c_face + 1, v);
set_vertex(box, v, c_face);
set_vertex(box, v, (c_face + 5) % 6);
set_vertex(box, v, (c_face + 1) % 6);
}
render_box (box);
}