void RE_ProjectDecal( qhandle_t hShader, int numPoints, vec3_t *points, vec4_t projection, vec4_t color, int lifeTime,
int fadeTime )
{
int i;
float radius, iDist;
vec3_t xyz;
vec4_t omniProjection;
decalVert_t dv[ 4 ];
decalProjector_t *dp, temp;
/* first frame rendered does not have a valid decals list */
if ( tr.refdef.decalProjectors == NULL )
{
return;
}
/* dummy check */
if ( numPoints != 1 && numPoints != 3 && numPoints != 4 )
{
ri.Printf( PRINT_WARNING, "WARNING: Invalid number of decal points (%d)\n", numPoints );
return;
}
/* early outs */
if ( lifeTime == 0 )
{
return;
}
if ( projection[ 3 ] <= 0.0f )
{
return;
}
/* set times properly */
if ( lifeTime < 0 || fadeTime < 0 )
{
lifeTime = 0;
fadeTime = 0;
}
/* basic setup */
temp.shader = R_GetShaderByHandle( hShader ); /* debug code */
temp.numPlanes = temp.shader->entityMergable;
temp.color[ 0 ] = color[ 0 ] * 255;
temp.color[ 1 ] = color[ 1 ] * 255;
temp.color[ 2 ] = color[ 2 ] * 255;
temp.color[ 3 ] = color[ 3 ] * 255;
temp.numPlanes = numPoints + 2;
temp.fadeStartTime = tr.refdef.time + lifeTime - fadeTime;
temp.fadeEndTime = temp.fadeStartTime + fadeTime;
/* set up decal texcoords (fixme: support arbitrary projector st coordinates in trapcall) */
dv[ 0 ].st[ 0 ] = 0.0f;
dv[ 0 ].st[ 1 ] = 0.0f;
dv[ 1 ].st[ 0 ] = 0.0f;
dv[ 1 ].st[ 1 ] = 1.0f;
dv[ 2 ].st[ 0 ] = 1.0f;
dv[ 2 ].st[ 1 ] = 1.0f;
dv[ 3 ].st[ 0 ] = 1.0f;
dv[ 3 ].st[ 1 ] = 0.0f;
/* omnidirectional? */
if ( numPoints == 1 )
{
/* set up omnidirectional */
numPoints = 4;
temp.numPlanes = 6;
temp.omnidirectional = qtrue;
radius = projection[ 3 ];
Vector4Set( omniProjection, 0.0f, 0.0f, -1.0f, radius * 2.0f );
projection = omniProjection;
iDist = 1.0f / ( radius * 2.0f );
/* set corner */
VectorSet( xyz, points[ 0 ][ 0 ] - radius, points[ 0 ][ 1 ] - radius, points[ 0 ][ 2 ] + radius );
/* make x axis texture matrix (yz) */
VectorSet( temp.texMat[ 0 ][ 0 ], 0.0f, iDist, 0.0f );
temp.texMat[ 0 ][ 0 ][ 3 ] = -DotProduct( temp.texMat[ 0 ][ 0 ], xyz );
VectorSet( temp.texMat[ 0 ][ 1 ], 0.0f, 0.0f, iDist );
temp.texMat[ 0 ][ 1 ][ 3 ] = -DotProduct( temp.texMat[ 0 ][ 1 ], xyz );
/* make y axis texture matrix (xz) */
VectorSet( temp.texMat[ 1 ][ 0 ], iDist, 0.0f, 0.0f );
temp.texMat[ 1 ][ 0 ][ 3 ] = -DotProduct( temp.texMat[ 1 ][ 0 ], xyz );
VectorSet( temp.texMat[ 1 ][ 1 ], 0.0f, 0.0f, iDist );
temp.texMat[ 1 ][ 1 ][ 3 ] = -DotProduct( temp.texMat[ 1 ][ 1 ], xyz );
/* make z axis texture matrix (xy) */
VectorSet( temp.texMat[ 2 ][ 0 ], iDist, 0.0f, 0.0f );
temp.texMat[ 2 ][ 0 ][ 3 ] = -DotProduct( temp.texMat[ 2 ][ 0 ], xyz );
VectorSet( temp.texMat[ 2 ][ 1 ], 0.0f, iDist, 0.0f );
temp.texMat[ 2 ][ 1 ][ 3 ] = -DotProduct( temp.texMat[ 2 ][ 1 ], xyz );
/* setup decal points */
VectorSet( dv[ 0 ].xyz, points[ 0 ][ 0 ] - radius, points[ 0 ][ 1 ] - radius, points[ 0 ][ 2 ] + radius );
VectorSet( dv[ 1 ].xyz, points[ 0 ][ 0 ] - radius, points[ 0 ][ 1 ] + radius, points[ 0 ][ 2 ] + radius );
VectorSet( dv[ 2 ].xyz, points[ 0 ][ 0 ] + radius, points[ 0 ][ 1 ] + radius, points[ 0 ][ 2 ] + radius );
VectorSet( dv[ 3 ].xyz, points[ 0 ][ 0 ] + radius, points[ 0 ][ 1 ] - radius, points[ 0 ][ 2 ] + radius );
}
else
{
/* set up unidirectional */
temp.omnidirectional = qfalse;
/* set up decal points */
VectorCopy( points[ 0 ], dv[ 0 ].xyz );
VectorCopy( points[ 1 ], dv[ 1 ].xyz );
VectorCopy( points[ 2 ], dv[ 2 ].xyz );
VectorCopy( points[ 3 ], dv[ 3 ].xyz );
/* make texture matrix */
if ( !MakeTextureMatrix( temp.texMat[ 0 ], projection, &dv[ 0 ], &dv[ 1 ], &dv[ 2 ] ) )
{
return;
}
}
/* bound the projector */
ClearBounds( temp.mins, temp.maxs );
for ( i = 0; i < numPoints; i++ )
{
AddPointToBounds( dv[ i ].xyz, temp.mins, temp.maxs );
VectorMA( dv[ i ].xyz, projection[ 3 ], projection, xyz );
AddPointToBounds( xyz, temp.mins, temp.maxs );
}
/* make bounding sphere */
VectorAdd( temp.mins, temp.maxs, temp.center );
VectorScale( temp.center, 0.5f, temp.center );
VectorSubtract( temp.maxs, temp.center, xyz );
temp.radius = VectorLength( xyz );
temp.radius2 = temp.radius * temp.radius;
/* frustum cull the projector (fixme: this uses a stale frustum!) */
if ( R_CullPointAndRadius( temp.center, temp.radius ) == CULL_OUT )
{
return;
}
/* make the front plane */
if ( !PlaneFromPoints( temp.planes[ 0 ], dv[ 0 ].xyz, dv[ 1 ].xyz, dv[ 2 ].xyz ) )
{
return;
}
/* make the back plane */
VectorSubtract( vec3_origin, temp.planes[ 0 ], temp.planes[ 1 ] );
VectorMA( dv[ 0 ].xyz, projection[ 3 ], projection, xyz );
temp.planes[ 1 ][ 3 ] = DotProduct( xyz, temp.planes[ 1 ] );
/* make the side planes */
for ( i = 0; i < numPoints; i++ )
{
VectorMA( dv[ i ].xyz, projection[ 3 ], projection, xyz );
if ( !PlaneFromPoints( temp.planes[ i + 2 ], dv[( i + 1 ) % numPoints ].xyz, dv[ i ].xyz, xyz ) )
{
return;
}
}
/* create a new projector */
dp = &tr.refdef.decalProjectors[ r_numDecalProjectors & DECAL_PROJECTOR_MASK ];
Com_Memcpy( dp, &temp, sizeof( *dp ) );
/* we have a winner */
r_numDecalProjectors++;
}
static int MakeDecalProjector( shaderInfo_t *si, vec4_t projection, float distance, int numVerts, bspDrawVert_t **dv )
{
int i, j;
decalProjector_t *dp;
vec3_t xyz;
/* dummy check */
if( numVerts != 3 && numVerts != 4 )
return -1;
/* limit check */
if( numProjectors >= MAX_PROJECTORS )
{
MsgDev( D_WARN, "MAX_PROJECTORS (%d) exceeded, no more decal projectors available.\n", MAX_PROJECTORS );
return -2;
}
/* create a new projector */
dp = &projectors[ numProjectors ];
Mem_Set( dp, 0, sizeof( *dp ));
/* basic setup */
dp->si = si;
dp->numPlanes = numVerts + 2;
/* make texture matrix */
if( !MakeTextureMatrix( dp, projection, dv[ 0 ], dv[ 1 ], dv[ 2 ] ) )
return -1;
/* bound the projector */
ClearBounds( dp->mins, dp->maxs );
for( i = 0; i < numVerts; i++ )
{
AddPointToBounds( dv[ i ]->xyz, dp->mins, dp->maxs );
VectorMA( dv[ i ]->xyz, distance, projection, xyz );
AddPointToBounds( xyz, dp->mins, dp->maxs );
}
/* make bouding sphere */
VectorAdd( dp->mins, dp->maxs, dp->center );
VectorScale( dp->center, 0.5f, dp->center );
VectorSubtract( dp->maxs, dp->center, xyz );
dp->radius = VectorLength( xyz );
dp->radius2 = dp->radius * dp->radius;
/* make the front plane */
if( !PlaneFromPoints( dp->planes[ 0 ], dv[ 0 ]->xyz, dv[ 1 ]->xyz, dv[ 2 ]->xyz ) )
return -1;
/* make the back plane */
VectorSubtract( vec3_origin, dp->planes[ 0 ], dp->planes[ 1 ] );
VectorMA( dv[ 0 ]->xyz, distance, projection, xyz );
dp->planes[ 1 ][ 3 ] = DotProduct( xyz, dp->planes[ 1 ] );
/* make the side planes */
for( i = 0; i < numVerts; i++ )
{
j = (i + 1) % numVerts;
VectorMA( dv[ i ]->xyz, distance, projection, xyz );
if( !PlaneFromPoints( dp->planes[ i + 2 ], dv[ j ]->xyz, dv[ i ]->xyz, xyz ) )
return -1;
}
/* return ok */
numProjectors++;
return numProjectors - 1;
}
/**
* @brief Creates a new decal projector from a triangle.
*
* Projected polygons should be 3 or 4 points.
*
* If a single point is passed in (numPoints == 1) then the decal will be omnidirectional
* omnidirectional decals use points[ 0 ] as center and projection[ 3 ] as radius
* pass in lifeTime < 0 for a temporary mark.
*
* @param[in] hShader
* @param[in] numPoints
* @param[in] points
* @param[in] projection
* @param[in] color
* @param[in] lifeTime
* @param[in] fadeTime
*/
void RE_ProjectDecal(qhandle_t hShader, int numPoints, vec3_t *points, vec4_t projection, vec4_t color, int lifeTime,
int fadeTime)
{
static int totalProjectors = 0;
vec3_t xyz;
decalVert_t dv[4];
int i;
decalProjector_t *dp, temp;
if (r_numDecalProjectors >= MAX_DECAL_PROJECTORS)
{
Ren_Print("WARNING: RE_ProjectDecal() Max decal projectors reached (%d)\n", MAX_DECAL_PROJECTORS);
return;
}
// dummy check
if (numPoints != 1 && numPoints != 3 && numPoints != 4)
{
Ren_Print("WARNING: RE_ProjectDecal() Invalid number of decal points (%d)\n", numPoints);
return;
}
// early outs
if (lifeTime == 0)
{
Ren_Developer("WARNING: RE_ProjectDecal() lifeTime == 0\n"); // modders should have a look at this - vanilla does these calls
return;
}
if (projection[3] <= 0.0f)
{
Ren_Print("WARNING: RE_ProjectDecal() projection[3] <= 0.0f\n");
return;
}
// set times properly
if (lifeTime < 0 || fadeTime < 0)
{
lifeTime = 0;
fadeTime = 0;
}
// basic setup
temp.shader = R_GetShaderByHandle(hShader);
temp.color[0] = (byte)(color[0] * 255);
temp.color[1] = (byte)(color[1] * 255);
temp.color[2] = (byte)(color[2] * 255);
temp.color[3] = (byte)(color[3] * 255);
temp.numPlanes = numPoints + 2;
temp.fadeStartTime = tr.refdef.time + lifeTime - fadeTime; // FIXME: stale refdef time
temp.fadeEndTime = temp.fadeStartTime + fadeTime;
temp.projectorNum = 0;
// set up decal texcoords (FIXME: support arbitrary projector st coordinates in trapcall)
dv[0].st[0] = 0.0f;
dv[0].st[1] = 0.0f;
dv[1].st[0] = 0.0f;
dv[1].st[1] = 1.0f;
dv[2].st[0] = 1.0f;
dv[2].st[1] = 1.0f;
dv[3].st[0] = 1.0f;
dv[3].st[1] = 0.0f;
// omnidirectional?
if (numPoints == 1)
{
float radius;
float iDist;
// set up omnidirectional
numPoints = 4;
temp.numPlanes = 6;
temp.omnidirectional = qtrue;
radius = projection[3];
Vector4Set(projection, 0.0f, 0.0f, -1.0f, radius * 2.0f);
iDist = 1.0f / (radius * 2.0f);
// set corner
VectorSet(xyz, points[0][0] - radius, points[0][1] - radius, points[0][2] + radius);
// make x axis texture matrix (yz)
VectorSet(temp.texMat[0][0], 0.0f, iDist, 0.0f);
temp.texMat[0][0][3] = -DotProduct(temp.texMat[0][0], xyz);
VectorSet(temp.texMat[0][1], 0.0f, 0.0f, iDist);
temp.texMat[0][1][3] = -DotProduct(temp.texMat[0][1], xyz);
// make y axis texture matrix (xz)
VectorSet(temp.texMat[1][0], iDist, 0.0f, 0.0f);
temp.texMat[1][0][3] = -DotProduct(temp.texMat[1][0], xyz);
VectorSet(temp.texMat[1][1], 0.0f, 0.0f, iDist);
temp.texMat[1][1][3] = -DotProduct(temp.texMat[1][1], xyz);
// make z axis texture matrix (xy)
VectorSet(temp.texMat[2][0], iDist, 0.0f, 0.0f);
temp.texMat[2][0][3] = -DotProduct(temp.texMat[2][0], xyz);
VectorSet(temp.texMat[2][1], 0.0f, iDist, 0.0f);
temp.texMat[2][1][3] = -DotProduct(temp.texMat[2][1], xyz);
// setup decal points
VectorSet(dv[0].xyz, points[0][0] - radius, points[0][1] - radius, points[0][2] + radius);
VectorSet(dv[1].xyz, points[0][0] - radius, points[0][1] + radius, points[0][2] + radius);
VectorSet(dv[2].xyz, points[0][0] + radius, points[0][1] + radius, points[0][2] + radius);
VectorSet(dv[3].xyz, points[0][0] + radius, points[0][1] - radius, points[0][2] + radius);
}
else
{
// set up unidirectional
temp.omnidirectional = qfalse;
// set up decal points
VectorCopy(points[0], dv[0].xyz);
VectorCopy(points[1], dv[1].xyz);
VectorCopy(points[2], dv[2].xyz);
VectorCopy(points[3], dv[3].xyz);
// make texture matrix
if (!MakeTextureMatrix(temp.texMat[0], projection, &dv[0], &dv[1], &dv[2]))
{
Ren_Print("WARNING: RE_ProjectDecal() MakeTextureMatrix returns NULL\n");
return;
}
}
// bound the projector
ClearBounds(temp.mins, temp.maxs);
for (i = 0; i < numPoints; i++)
{
AddPointToBounds(dv[i].xyz, temp.mins, temp.maxs);
VectorMA(dv[i].xyz, projection[3], projection, xyz);
AddPointToBounds(xyz, temp.mins, temp.maxs);
}
// make bounding sphere
VectorAdd(temp.mins, temp.maxs, temp.center);
VectorScale(temp.center, 0.5f, temp.center);
VectorSubtract(temp.maxs, temp.center, xyz);
temp.radius = VectorLength(xyz);
temp.radius2 = temp.radius * temp.radius;
// make the front plane
if (!PlaneFromPoints(temp.planes[0], dv[0].xyz, dv[1].xyz, dv[2].xyz))
{
Ren_Developer("WARNING: RE_ProjectDecal() PlaneFromPoints is NULL\n"); // occurs on UJE_fueldump
return;
}
// make the back plane
VectorSubtract(vec3_origin, temp.planes[0], temp.planes[1]);
VectorMA(dv[0].xyz, projection[3], projection, xyz);
temp.planes[1][3] = DotProduct(xyz, temp.planes[1]);
// make the side planes
for (i = 0; i < numPoints; i++)
{
VectorMA(dv[i].xyz, projection[3], projection, xyz);
if (!PlaneFromPoints(temp.planes[i + 2], dv[(i + 1) % numPoints].xyz, dv[i].xyz, xyz))
{
Ren_Developer("WARNING: RE_ProjectDecal() a side plane is NULL\n"); // occurs on map venice
return;
}
}
// create a new projector
dp = &backEndData->decalProjectors[r_numDecalProjectors];
Com_Memcpy(dp, &temp, sizeof(*dp));
dp->projectorNum = totalProjectors++;
// we have a winner
r_numDecalProjectors++;
}
static int MakeDecalProjector( int mapEntityNum, shaderInfo_t *si, vec4_t projection, float distance, int numVerts, bspDrawVert_t **dv, float backfacecull, float lightmapScale, vec3_t lightmapAxis, vec3_t minlight, vec3_t minvertexlight, vec3_t ambient, vec3_t colormod, int smoothNormals )
{
int i, j;
decalProjector_t *dp;
vec3_t xyz;
/* dummy check */
if( numVerts != 3 && numVerts != 4 )
return -1;
/* limit check */
if( numProjectors >= MAX_PROJECTORS )
{
Sys_Warning( mapEntityNum, "MAX_PROJECTORS (%d) exceeded, no more decal projectors available.", MAX_PROJECTORS );
return -2;
}
/* create a new projector */
dp = &projectors[ numProjectors ];
memset( dp, 0, sizeof( decalProjector_t ) );
/* basic setup */
dp->si = si;
dp->numPlanes = numVerts + 2;
dp->backfacecull = backfacecull;
dp->lightmapScale = lightmapScale;
VectorCopy( lightmapAxis, dp->lightmapAxis );
VectorCopy( minlight, dp->minlight );
VectorCopy( minvertexlight, dp->minvertexlight );
VectorCopy( ambient, dp->ambient );
VectorCopy( colormod, dp->colormod );
dp->smoothNormals = smoothNormals;
dp->mapEntityNum = mapEntityNum;
/* make texture matrix */
if( !MakeTextureMatrix( dp, projection, dv[ 0 ], dv[ 1 ], dv[ 2 ] ) )
return -1;
/* bound the projector */
ClearBounds( dp->mins, dp->maxs );
for( i = 0; i < numVerts; i++ )
{
AddPointToBounds( dv[ i ]->xyz, dp->mins, dp->maxs );
VectorMA( dv[ i ]->xyz, distance, projection, xyz );
AddPointToBounds( xyz, dp->mins, dp->maxs );
}
/* make bouding sphere */
VectorAdd( dp->mins, dp->maxs, dp->center );
VectorScale( dp->center, 0.5f, dp->center );
VectorSubtract( dp->maxs, dp->center, xyz );
dp->radius = VectorLength( xyz );
dp->radius2 = dp->radius * dp->radius;
/* make the front plane */
if( !PlaneFromPoints( dp->planes[ 0 ], dv[ 0 ]->xyz, dv[ 1 ]->xyz, dv[ 2 ]->xyz ) )
return -1;
/* make the back plane */
VectorSubtract( vec3_origin, dp->planes[ 0 ], dp->planes[ 1 ] );
VectorMA( dv[ 0 ]->xyz, distance, projection, xyz );
dp->planes[ 1 ][ 3 ] = DotProduct( xyz, dp->planes[ 1 ] );
/* make the side planes */
for( i = 0; i < numVerts; i++ )
{
j = (i + 1) % numVerts;
VectorMA( dv[ i ]->xyz, distance, projection, xyz );
if( !PlaneFromPoints( dp->planes[ i + 2 ], dv[ j ]->xyz, dv[ i ]->xyz, xyz ) )
return -1;
}
/* return ok */
numProjectors++;
return numProjectors - 1;
}