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Change OGL splitscreen hack to match software behavior

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This commit is contained in:
fickleheart 2019-02-24 12:26:46 -06:00
parent 9d30a0f2bc
commit 1499a47541
1 changed files with 19 additions and 25 deletions
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44
src/hardware/r_opengl/r_opengl.c
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@ -2056,10 +2056,11 @@ EXPORT void HWRAPI(DrawMD2) (INT32 *gl_cmd_buffer, md2_frame_t *frame, FTransfor
EXPORT void HWRAPI(SetTransform) (FTransform *stransform)
{
static boolean special_splitscreen;
float used_fov;
pglLoadIdentity();
if (stransform)
{
boolean fovx90;
used_fov = stransform->fovxangle;
// keep a trace of the transformation for md2
memcpy(&md2_transform, stransform, sizeof (md2_transform));
@ -2074,36 +2075,29 @@ EXPORT void HWRAPI(SetTransform) (FTransform *stransform)
pglRotatef(stransform->angley+270.0f, 0.0f, 1.0f, 0.0f);
pglTranslatef(-stransform->x, -stransform->z, -stransform->y);
pglMatrixMode(GL_PROJECTION);
pglLoadIdentity();
fovx90 = stransform->fovxangle > 0.0f && fabsf(stransform->fovxangle - 90.0f) < 0.5f;
special_splitscreen = (stransform->splitscreen == 1 && fovx90);
if (special_splitscreen)
GLPerspective(53.13l, 2*ASPECT_RATIO); // 53.13 = 2*atan(0.5)
else
GLPerspective(stransform->fovxangle, ASPECT_RATIO);
#ifndef MINI_GL_COMPATIBILITY
pglGetDoublev(GL_PROJECTION_MATRIX, projMatrix); // added for new coronas' code (without depth buffer)
#endif
pglMatrixMode(GL_MODELVIEW);
special_splitscreen = (stransform->splitscreen == 1);
}
else
{
//Hurdler: is "fov" correct?
used_fov = fov;
pglScalef(1.0f, 1.0f, -1.0f);
pglMatrixMode(GL_PROJECTION);
pglLoadIdentity();
if (special_splitscreen)
GLPerspective(53.13l, 2*ASPECT_RATIO); // 53.13 = 2*atan(0.5)
else
//Hurdler: is "fov" correct?
GLPerspective(fov, ASPECT_RATIO);
#ifndef MINI_GL_COMPATIBILITY
pglGetDoublev(GL_PROJECTION_MATRIX, projMatrix); // added for new coronas' code (without depth buffer)
#endif
pglMatrixMode(GL_MODELVIEW);
}
pglMatrixMode(GL_PROJECTION);
pglLoadIdentity();
if (special_splitscreen)
{
used_fov = atan(tan(used_fov*M_PI/360)*0.8)*360/M_PI;
GLPerspective(used_fov, 2*ASPECT_RATIO);
}
else
GLPerspective(used_fov, ASPECT_RATIO);
#ifndef MINI_GL_COMPATIBILITY
pglGetDoublev(GL_PROJECTION_MATRIX, projMatrix); // added for new coronas' code (without depth buffer)
#endif
pglMatrixMode(GL_MODELVIEW);
#ifndef MINI_GL_COMPATIBILITY
pglGetDoublev(GL_MODELVIEW_MATRIX, modelMatrix); // added for new coronas' code (without depth buffer)
#endif