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/*
===========================================================================
Copyright (C) 2023-2024 the OpenMoHAA team
This file is part of OpenMoHAA source code.
OpenMoHAA source code 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.
OpenMoHAA source code 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 OpenMoHAA source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
// tr_swipe.cpp -- swipe rendering
#include "tr_local.h"
#define MAX_SWIPE_POINTS 1024
#define MAX_SWIPES 32
typedef struct {
vec3_t points[2];
float time;
} rswipepoint_t;
typedef struct {
surfaceType_t surftype;
float life;
float time;
int lastrendtime;
qhandle_t shader;
int numswipes;
rswipepoint_t swipes[MAX_SWIPE_POINTS];
} rendswipe_t;
static int lastswipeframe;
static int numswipes;
static rendswipe_t swipes[MAX_SWIPES];
/*
======================
RE_SwipeBegin
======================
*/
void RE_SwipeBegin(float thistime, float life, qhandle_t shader)
{
rendswipe_t *swipe;
if (tr.frameCount != lastswipeframe) {
swipe = &swipes[0];
numswipes = 0;
}
if (numswipes >= MAX_SWIPES) {
return;
}
swipe = &swipes[numswipes++];
swipe->life = life;
swipe->time = thistime;
swipe->surftype = SF_SWIPE;
swipe->numswipes = 0;
swipe->lastrendtime = 0;
swipe->shader = shader;
if (shader < 0 && life) {
ri.Printf(PRINT_DEVELOPER, "RE_SwipeBegin: Invalid shader handle\n");
}
lastswipeframe = tr.frameCount;
}
/*
======================
RE_SwipePoint
======================
*/
void RE_SwipePoint(vec3_t point1, vec3_t point2, float time)
{
rendswipe_t *swipe = &swipes[numswipes - 1];
if (swipe->numswipes >= MAX_SWIPE_POINTS) {
return;
}
VectorCopy(point1, swipe->swipes[swipe->numswipes - 1].points[0]);
VectorCopy(point2, swipe->swipes[swipe->numswipes - 1].points[1]);
}
/*
======================
RE_SwipeEnd
======================
*/
void RE_SwipeEnd() {}
/*
======================
R_AddSwipeSurfaces
======================
*/
void R_AddSwipeSurfaces()
{
shader_t *shader;
int at;
if (!numswipes) {
return;
}
tr.currentEntityNum = ENTITYNUM_WORLD;
tr.shiftedEntityNum = tr.currentEntityNum << QSORT_REFENTITYNUM_SHIFT;
for (at = 0; at < numswipes; at++) {
rendswipe_t *swipe = &swipes[at];
int timedelta = 0;
if (!swipe->numswipes) {
continue;
}
if (swipe->lastrendtime) {
timedelta = tr.refdef.time - swipe->lastrendtime;
}
swipe->lastrendtime = tr.refdef.time;
if (timedelta) {
swipe->time += timedelta;
}
shader = R_GetShaderByHandle(swipe->shader);
R_AddDrawSurf(&swipe->surftype, shader, 0, 0, 0, 0);
}
}
/*
======================
RB_DrawSwipeSurface
======================
*/
void RB_DrawSwipeSurface(surfaceType_t *pswipe)
{
int i;
float oolife;
rendswipe_t *swipe = (rendswipe_t *)pswipe;
oolife = 1.0 / swipe->life;
RB_CHECKOVERFLOW(swipe->numswipes * 2, swipe->numswipes * 6);
RB_StreamBeginDrawSurf();
for (i = 0; i < swipe->numswipes; i++) {
rswipepoint_t *swipepoint = &swipe->swipes[i];
float alpha;
float f;
f = 1.0 - (swipe->time - swipepoint->time) * oolife;
if (f > 0 && swipe->time >= swipepoint->time) {
alpha = f - Q_max(f - 1.0, 0);
RB_Color4f(alpha, alpha, alpha, alpha);
RB_Texcoord2f(i / (float)swipe->numswipes, 1.0);
RB_Vertex3fv(swipepoint->points[0]);
RB_Texcoord2f(i / (float)swipe->numswipes, 1.0);
RB_Vertex3fv(swipepoint->points[1]);
} else if (i == swipe->numswipes - 1) {
swipe->numswipes = 0;
}
}
RB_StreamEndDrawSurf();
}
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