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Hopefully get the 3d view and projection transforms setup.

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This commit is contained in:
Bill Currie 2011-12-30 21:10:24 +09:00
parent 20d93466c7
commit 16f84cd496
1 changed files with 82 additions and 0 deletions
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82
libs/video/renderer/glsl/glsl_main.c
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@ -45,14 +45,19 @@ static __attribute__ ((used)) const char rcsid[] = "$Id$";
#include "QF/render.h"
#include "QF/screen.h"
#include "QF/skin.h"
#include "QF/sys.h"
#include "QF/GLSL/funcs.h"
#include "QF/GLSL/qf_textures.h"
#include "gl_draw.h"
#include "r_cvar.h"
#include "r_dynamic.h"
#include "r_local.h"
#include "r_screen.h"
mat4_t glsl_projection;
mat4_t glsl_view;
VISIBLE vec3_t r_origin, vpn, vright, vup;
VISIBLE refdef_t r_refdef;
qboolean r_cache_thrash;
@ -70,11 +75,88 @@ gl_overbright_f (cvar_t *var)
VISIBLE void
R_ViewChanged (float aspect)
{
double xmin, xmax, ymin, ymax;
float fovx, fovy, neard, fard;
vec_t *proj = glsl_projection;
fovx = r_refdef.fov_x;
fovy = r_refdef.fov_y;
neard = r_nearclip->value;
fard = r_farclip->value;
ymax = neard * tan (fovy * M_PI / 360); // fov_2 / 2
ymin = -ymax;
xmax = neard * tan (fovx * M_PI / 360); // fov_2 / 2
xmin = -xmax;
proj[0] = (2 * neard) / (xmax - xmin);
proj[4] = 0;
proj[8] = (xmax + xmin) / (xmax - xmin);
proj[12] = 0;
proj[1] = 0;
proj[5] = (2 * neard) / (ymax - ymin);
proj[9] = (ymax + ymin) / (ymax - ymin);
proj[13] = 0;
proj[2] = 0;
proj[6] = 0;
proj[10] = (fard + neard) / (neard - fard);
proj[14] = (2 * fard + neard) / (neard - fard);
proj[3] = 0;
proj[7] = 0;
proj[11] = -1;
proj[15] = 0;
}
void
R_SetupFrame (void)
{
R_ClearEnts ();
r_framecount++;
VectorCopy (r_refdef.vieworg, r_origin);
AngleVectors (r_refdef.viewangles, vpn, vright, vup);
}
static void
R_SetupView (void)
{
float x, y, w, h;
mat4_t mat;
static mat4_t z_up = {
0, 0, -1, 0,
-1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 0, 1,
};
x = r_refdef.vrect.x;
y = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height));
w = r_refdef.vrect.width;
h = r_refdef.vrect.height;
qfglViewport (x, y, w, h);
Mat4Zero (mat);
VectorCopy (vpn, mat + 0);
VectorNegate (vright, mat + 4); // we want vleft
VectorCopy (vup, mat + 8);
mat[15] = 1;
Mat4Transpose (mat, mat);//AngleVectors gives the transpose of what we want
Mat4Mult (z_up, mat, glsl_view);
Mat4Identity (mat);
VectorNegate (r_refdef.vieworg, mat + 12);
Mat4Mult (glsl_view, mat, glsl_view);
}
}
VISIBLE void
R_RenderView (void)
{
R_SetupFrame ();
R_SetupView ();
}
VISIBLE void