mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-14 17:01:22 +00:00
8acd5c558b
This puts the hierarchy (transform) reference, animation, visibility, renderer, active, and old_origin data in separate components. There are a few bugs (crashes on grenade explosions in gl/glsl/vulkan, immediately in sw, reasons known, missing brush models in vulkan). While quake doesn't really need an ECS, the direction I want to take QF does, and it does seem to have improved memory bandwidth a little (uncertain). However, there's a lot more work to go (especially fixing the above bugs), but this seems to be a good start.
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/*
|
|
r_billboard.c
|
|
|
|
Billboard frame setup
|
|
|
|
Copyright (C) 1996-1997 Id Software, Inc.
|
|
|
|
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:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif
|
|
#ifdef HAVE_STRINGS_H
|
|
# include <string.h>
|
|
#endif
|
|
|
|
#include <math.h>
|
|
|
|
#include "QF/render.h"
|
|
#include "QF/sys.h"
|
|
|
|
#include "QF/scene/entity.h"
|
|
|
|
#include "r_internal.h"
|
|
|
|
|
|
int
|
|
R_BillboardFrame (transform_t transform, int orientation, vec4f_t cameravec,
|
|
vec4f_t *bbup, vec4f_t *bbright, vec4f_t *bbfwd)
|
|
{
|
|
vec4f_t tvec;
|
|
float dot;
|
|
|
|
switch (orientation) {
|
|
case SPR_FACING_UPRIGHT:
|
|
// the billboard has its up vector parallel with world up, and
|
|
// its right vector perpendicular to cameravec.
|
|
// Undefined if the camera is too close to the entity.
|
|
tvec = -normalf (cameravec);
|
|
dot = tvec[2]; // DotProduct (tvec, world up)
|
|
if ((dot > 0.999848) || (dot < -0.999848)) // cos(1 degree)
|
|
return 0;
|
|
*bbup = (vec4f_t) { 0, 0, 1, 0 };
|
|
//CrossProduct(bbup, -cameravec, bbright)
|
|
*bbright = normalf ((vec4f_t) { tvec[1], -tvec[0], 0, 0 });
|
|
//CrossProduct (bbright, bbup, bbfwd)
|
|
*bbfwd = (vec4f_t) { -(*bbright)[1], (*bbright)[0], 0, 0};
|
|
break;
|
|
case SPR_VP_PARALLEL:
|
|
// the billboard always has the same orientation as the camera
|
|
*bbup = r_refdef.frame.up;
|
|
*bbright = r_refdef.frame.right;
|
|
*bbfwd = r_refdef.frame.forward;
|
|
break;
|
|
case SPR_VP_PARALLEL_UPRIGHT:
|
|
// the billboar has its up vector parallel with world up, and
|
|
// its right vector parallel with the view plane.
|
|
// Undefined if the camera is looking straight up or down.
|
|
dot = r_refdef.frame.forward[2];
|
|
if ((dot > 0.999848) || (dot < -0.999848)) // cos(1 degree)
|
|
return 0;
|
|
*bbup = (vec4f_t) { 0, 0, 1, 0 };
|
|
*bbright = normalf ((vec4f_t) {r_refdef.frame.forward[1],
|
|
-r_refdef.frame.forward[0], 0, 0 });
|
|
*bbfwd = (vec4f_t) { -(*bbright)[1], (*bbright)[0], 0, 0};
|
|
break;
|
|
case SPR_ORIENTED:
|
|
{
|
|
// The billboard's orientation is fully specified by the
|
|
// entity's orientation.
|
|
mat4f_t mat;
|
|
Transform_GetWorldMatrix (transform, mat);
|
|
*bbfwd = mat[0];
|
|
*bbright = mat[1];
|
|
*bbup = mat[2];
|
|
}
|
|
break;
|
|
case SPR_VP_PARALLEL_ORIENTED:
|
|
{
|
|
// The billboard is rotated relative to the camera using
|
|
// the entity's local rotation.
|
|
mat4f_t entmat;
|
|
mat4f_t spmat;
|
|
Transform_GetLocalMatrix (transform, entmat);
|
|
// FIXME needs proper testing (need to find, make, or fake a
|
|
// parallel oriented sprite)
|
|
mmulf (spmat, r_refdef.camera, entmat);
|
|
*bbfwd = spmat[0];
|
|
*bbright = spmat[1];
|
|
*bbup = spmat[2];
|
|
}
|
|
break;
|
|
default:
|
|
Sys_Error ("R_BillboardFrame: Bad orientation %d", orientation);
|
|
}
|
|
return 1;
|
|
}
|