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rt_funcs_render_pipe.c
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rt_funcs_render_pipe.c
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#include "rt_funcs_render_pipe.h"
void rt_init( char *path )
{
size_t sz = strlen( path );
size_t szRt = strlen( "/CL/rt_raytrace.cl" );
size_t tmpP = sz - 1;
while ( path[tmpP] != '/' && tmpP != 0 )
--tmpP;
rt_cl_include_path = malloc( sizeof(char) * tmpP );
rt_cl_raytrace_kernel_path = malloc( sizeof(char) * (tmpP + szRt) );
strncpy( rt_cl_include_path, path, tmpP );
strncpy( rt_cl_raytrace_kernel_path, path, tmpP );
strcat( rt_cl_raytrace_kernel_path, "/CL/rt_raytrace.cl" );
}
void rt_render_pipe_create( rt_render_pipe *pRp, int w, int h )
{
if ( !pRp )
exit( -1 );
rt_init_opencl( pRp );
rt_init_buffers( pRp );
pRp->screenData = NULL;
rt_render_pipe_set_image_size( pRp, w, h );
}
void rt_render_pipe_calc_wg_size( rt_render_pipe *pRp, int w, int h )
{
size_t maxSz;
rt_opencl_content *ocl = &(pRp->oclContent);
clGetDeviceInfo( ocl->dev,
CL_DEVICE_MAX_WORK_GROUP_SIZE,
sizeof(size_t), &maxSz, NULL );
ocl->workGroupSz[0] = (size_t) sqrt( maxSz );
ocl->workGroupSz[1] = (size_t) sqrt( maxSz );
ocl->workGroupSz[0] *= ((float)pRp->w < (float)pRp->h) ?
((float)pRp->w / (float)pRp->h) : 1.0f;
ocl->workGroupSz[1] *= ((float)pRp->h < (float)pRp->w) ?
((float)pRp->h / (float)pRp->w) : 1.0f;
if ( !(is_power_of_two_size_t(ocl->workGroupSz[0])
&& is_power_of_two_size_t(ocl->workGroupSz[1])) )
{
size_t *minSz = NULL, *maxSz = NULL;
size_t maxSzPos = 0, minSzPos = 0;
size_t mask;
if ( ocl->workGroupSz[0] > ocl->workGroupSz[1] )
{
minSz = ocl->workGroupSz + 1;
maxSz = ocl->workGroupSz;
}
else
{
minSz = ocl->workGroupSz;
maxSz = ocl->workGroupSz + 1;
}
*maxSz <<= 1;
mask = (size_t)(1) << (8 * sizeof( size_t ) - 1);
while ( !(*maxSz & mask) )
{
mask >>= 1;
++maxSzPos;
}
mask = (size_t)(1) << (8 * sizeof( size_t ) - 1);
while ( !(*minSz & mask) )
{
mask >>= 1;
++minSzPos;
}
*minSz >>= 8 * sizeof(size_t) - minSzPos - 1;
*minSz <<= 8 * sizeof(size_t) - minSzPos - 1;
*maxSz >>= 8 * sizeof(size_t) - maxSzPos - 1;
*maxSz <<= 8 * sizeof(size_t) - maxSzPos - 1;
}
}
void rt_render_pipe_set_image_size( rt_render_pipe *pRp, int w, int h )
{
if ( !pRp )
exit( -1 );
rt_render_pipe_calc_wg_size( pRp, w, h );
if ( pRp->screenData )
free( pRp->screenData );
pRp->screenData = (rt_argb *) malloc( sizeof(rt_argb) * h * w );
pRp->w = w;
pRp->h = h;
}
void rt_render_pipe_reset_blocks( rt_render_pipe *pRp )
{
if ( pRp == NULL )
exit( -1 );
clReleaseMemObject( pRp->memp );
clReleaseMemObject( pRp->mempdecs );
clReleaseMemObject( pRp->meml );
clReleaseMemObject( pRp->memldecs );
clReleaseMemObject( pRp->memt );
clReleaseMemObject( pRp->memv );
clReleaseMemObject( pRp->memm );
rt_init_buffers( pRp );
}
void rt_init_buffers( rt_render_pipe *pRp )
{
if ( pRp == NULL )
exit( -1 );
pRp->primBlocks = 1;
pRp->primDecsBlocks = 1;
pRp->lightBlocks = 1;
pRp->lightDecsBlocks = 1;
pRp->triangleBlocks = 1;
pRp->vertexBlocks = 1;
pRp->materialBlocks = 1;
pRp->mempdecs = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
sizeof(rt_prim_desc) * PRIMS_IN_BLOCK, NULL, NULL );
pRp->memp = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
PRIMS_BLOCK_SIZE, NULL, NULL );
pRp->primsEnd = 0;
pRp->primsCount = 0;
pRp->memldecs = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
sizeof(rt_light_desc) * LIGHTS_IN_BLOCK, NULL, NULL );
pRp->meml = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
LIGHTS_BLOCK_SIZE, NULL, NULL );
pRp->lightsEnd = 0;
pRp->lightsCount = 0;
pRp->memt = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
sizeof(rt_triangle)*TRIANGLES_IN_BLOCK, NULL, NULL );
pRp->trianglesCount = 0;
pRp->memv = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
sizeof(rt_vertex)*VERTEX_IN_BLOCK, NULL, NULL );
pRp->vertexCount = 0;
pRp->memm = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
sizeof(rt_material)*MATERIALS_IN_BLOCK, NULL, NULL );
pRp->memc = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
sizeof(rt_camera), NULL, NULL );
}
void rt_render_pipe_set_camera( rt_render_pipe *pRp,
rt_camera *pFr )
{
rt_camera *memPtr;
if ( (pRp == NULL) || (pFr == NULL) )
exit( -1 );
memPtr = clEnqueueMapBuffer( pRp->oclContent.commQue, pRp->memc,
CL_TRUE, CL_MAP_WRITE, 0, sizeof(rt_camera), 0, NULL, NULL, NULL );
memcpy( memPtr, pFr, sizeof(rt_camera) );
clEnqueueUnmapMemObject( pRp->oclContent.commQue, pRp->memc, memPtr, 0,
NULL, NULL );
}
void rt_add_block( rt_render_pipe *pRp, size_t blockSize, size_t nededSize,
rt_ulong *curBlocksCount, cl_mem *buf )
{
cl_mem tmp;
if ( pRp == NULL )
exit( -1 );
rt_ulong newBlocksCount = nededSize / blockSize;
newBlocksCount = newBlocksCount ? newBlocksCount : 1;
tmp = clCreateBuffer( pRp->oclContent.context, CL_MEM_READ_ONLY,
blockSize * (*curBlocksCount + newBlocksCount), NULL, NULL );
clEnqueueCopyBuffer( pRp->oclContent.commQue, *buf, tmp, 0, 0,
blockSize * *curBlocksCount, 0, NULL, 0 );
clReleaseMemObject( *buf );
*buf = tmp;
*curBlocksCount += newBlocksCount;
}
void rt_render_pipe_add_primitive( rt_render_pipe *pRp, void *pPrim,
RT_PRIMITIVE_TYPE pt )
{
rt_prim_desc *pClPDecs;
void *memPtr;
if ( (pRp == NULL) || (pPrim == NULL) )
exit( -1 );
if ( (pRp->primsCount + 1) > PRIMS_IN_BLOCK * pRp->primDecsBlocks )
rt_add_block( pRp, sizeof(rt_prim_desc) * PRIMS_IN_BLOCK,
sizeof(rt_prim_desc), &(pRp->primDecsBlocks),
&(pRp->mempdecs) );
pClPDecs = clEnqueueMapBuffer( pRp->oclContent.commQue, pRp->mempdecs,
CL_TRUE, CL_MAP_WRITE,
sizeof(rt_prim_desc) * (pRp->primsCount),
sizeof(rt_prim_desc), 0, NULL, NULL, NULL );
pClPDecs->pt = pt;
pClPDecs->offset = pRp->primsEnd;
clEnqueueUnmapMemObject( pRp->oclContent.commQue, pRp->mempdecs, pClPDecs, 0,
NULL, NULL );
switch( pt )
{
case RT_PT_SPHERE:
if ( (pRp->primsEnd + sizeof(rt_sphere))
>= PRIMS_BLOCK_SIZE * pRp->primBlocks )
rt_add_block( pRp, PRIMS_BLOCK_SIZE, sizeof(rt_sphere),
&(pRp->primBlocks), &(pRp->memp) );
memPtr = clEnqueueMapBuffer( pRp->oclContent.commQue, pRp->memp, CL_TRUE,
CL_MAP_WRITE, pRp->primsEnd, sizeof(rt_sphere),
0, NULL, NULL, NULL );
memcpy( memPtr, pPrim, sizeof(rt_sphere) );
clEnqueueUnmapMemObject( pRp->oclContent.commQue, pRp->memp, memPtr, 0,
NULL, NULL );
pRp->primsEnd += sizeof(rt_sphere);
break;
default:
break;
}
++(pRp->primsCount);
}
void rt_render_pipe_add_triangles( rt_render_pipe *pRp,
rt_vertex *pV, rt_triangle *pTr, rt_ulong vOffset, rt_ulong tOffset,
rt_ulong vCount, rt_ulong tCount, rt_ulong primGroup )
{
rt_triangle *pTrM;
int i;
if ( (pRp == NULL) || (pV == NULL) || (pTr == NULL) )
exit( -1 );
if ( (pRp->trianglesCount + tCount)
>= TRIANGLES_IN_BLOCK * pRp->triangleBlocks )
rt_add_block( pRp, TRIANGLES_IN_BLOCK * sizeof(rt_triangle),
sizeof(rt_triangle) * tCount, &(pRp->triangleBlocks),
&(pRp->memt) );
if ( (pRp->vertexCount + vCount) >= VERTEX_IN_BLOCK
* pRp->vertexBlocks)
rt_add_block( pRp, VERTEX_IN_BLOCK * sizeof(rt_vertex),
sizeof(rt_vertex) * vCount, &(pRp->vertexBlocks),
&(pRp->memv) );
clEnqueueWriteBuffer( pRp->oclContent.commQue, pRp->memv,
CL_TRUE, sizeof(rt_vertex) * (pRp->vertexCount),
sizeof(rt_vertex) * vCount, pV + vOffset, 0, NULL, NULL );
pTrM = clEnqueueMapBuffer( pRp->oclContent.commQue, pRp->memt, CL_TRUE,
CL_MAP_WRITE, sizeof(rt_triangle) * (pRp->trianglesCount),
sizeof(rt_triangle) * tCount, 0, NULL, NULL, NULL );
for ( i = 0; i < tCount; ++i )
{
pTrM[i].pV0 = pRp->vertexCount + pTr[i + tOffset].pV0 - vOffset;
pTrM[i].pV1 = pRp->vertexCount + pTr[i + tOffset].pV1 - vOffset;
pTrM[i].pV2 = pRp->vertexCount + pTr[i + tOffset].pV2 - vOffset;
pTrM[i].mat = primGroup;
}
clEnqueueUnmapMemObject( pRp->oclContent.commQue, pRp->memt, pTrM, 0,
NULL, NULL );
pRp->trianglesCount += tCount;
pRp->vertexCount += vCount;
}
void rt_render_pipe_add_material( rt_render_pipe *pRp, rt_material *pMat,
unsigned long int ind )
{
if ( (pRp == NULL) || (pMat == NULL) )
exit( -1 );
if ( (ind < 0) )
exit( -2 );
if ( ind >= MATERIALS_IN_BLOCK * pRp->materialBlocks )
rt_add_block( pRp, MATERIALS_IN_BLOCK * sizeof(rt_material),
sizeof(rt_material), &(pRp->materialBlocks),
&(pRp->memm) );
clEnqueueWriteBuffer( pRp->oclContent.commQue, pRp->memm,
CL_TRUE, sizeof(rt_material) * ind,
sizeof(rt_material), pMat, 0, NULL, NULL );
}
void rt_render_pipe_add_light( rt_render_pipe *pRp, void *pLight,
RT_LIGHT_TYPE lt )
{
int err;
rt_light_desc *pClLDecs;
void *memPtr;
if ( (pRp == NULL) || (pLight == NULL) )
exit( -1 );
if ( (pRp->lightsCount + 1) > LIGHTS_IN_BLOCK * pRp->lightDecsBlocks )
rt_add_block( pRp, sizeof(rt_light_desc) * LIGHTS_IN_BLOCK,
sizeof(rt_light_desc), &(pRp->lightDecsBlocks),
&(pRp->memldecs) );
pClLDecs = clEnqueueMapBuffer( pRp->oclContent.commQue, pRp->memldecs,
CL_TRUE, CL_MAP_WRITE,
sizeof(rt_light_desc) * (pRp->lightsCount),
sizeof(rt_light_desc), 0, NULL, NULL, NULL );
pClLDecs->lt = lt;
pClLDecs->offset = pRp->lightsEnd;
clEnqueueUnmapMemObject( pRp->oclContent.commQue, pRp->memldecs, pClLDecs, 0,
NULL, NULL );
switch( lt )
{
case RT_LT_POINT:
if ( (pRp->lightsEnd + sizeof(rt_point_light))
>= LIGHTS_BLOCK_SIZE * pRp->lightBlocks )
rt_add_block( pRp, LIGHTS_BLOCK_SIZE,
sizeof(rt_point_light), &(pRp->lightBlocks),
&(pRp->meml) );
memPtr = clEnqueueMapBuffer( pRp->oclContent.commQue, pRp->meml, CL_TRUE,
CL_MAP_WRITE, pRp->lightsEnd, sizeof(rt_point_light),
0, NULL, NULL, &err );
memcpy( memPtr, pLight, sizeof(rt_point_light) );
clEnqueueUnmapMemObject( pRp->oclContent.commQue, pRp->meml, memPtr, 0,
NULL, NULL );
pRp->lightsEnd += sizeof(rt_point_light);
break;
default:
break;
}
++(pRp->lightsCount);
}
void rt_render_pipe_get_camera( rt_render_pipe *pRp, rt_camera **ppCam )
{
if ( pRp == NULL || ppCam == NULL )
exit(-1);
*ppCam = clEnqueueMapBuffer( pRp->oclContent.commQue, pRp->memc,
CL_TRUE, CL_MAP_WRITE | CL_MAP_READ, 0, sizeof(rt_camera), 0,
NULL, NULL, NULL );
}
void rt_render_pipe_free_camera( rt_render_pipe *pRp, rt_camera *pC )
{
if ( pRp == NULL || pC == NULL )
exit( -1 );
clEnqueueUnmapMemObject( pRp->oclContent.commQue, pRp->memc, pC, 0,
NULL, NULL );
}
void rt_init_opencl( rt_render_pipe *pRp )
{
cl_platform_id plID[5];
cl_uint plCount;
cl_device_id devID[5][5];
cl_uint devCount[5];
cl_program prog;
int i;
cl_int ret;
size_t progsrcsz;
FILE *fp;
char *progsrc;
char *clArgs = malloc( sizeof(char)
* ( strlen(rt_cl_include_path) + 4) );
if ( pRp == NULL )
exit( -1 );
rt_opencl_content *ocl = &(pRp->oclContent);
ret = clGetPlatformIDs( 5, plID, &(plCount) );
for ( i = 0; i < plCount; ++i )
clGetDeviceIDs( plID[i], CL_DEVICE_TYPE_GPU, 5,
devID[i], devCount+i );
ocl->dev = devID[0][0];
{
char tmp[1024];
clGetPlatformInfo( plID[0], CL_PLATFORM_NAME,
1024, tmp, NULL );
printf( "choosen platform: %s\n", tmp );
clGetDeviceInfo( devID[0][0], CL_DEVICE_NAME,
1024, tmp, NULL );
printf( "choosen device: %s\n", tmp );
}
ocl->context = clCreateContext( NULL, 1, devID[0], NULL,
NULL, &ret );
ocl->commQue = clCreateCommandQueue( ocl->context,
devID[0][0], 0, &ret );
fp = fopen( rt_cl_raytrace_kernel_path, "r" );
progsrc = (char *) malloc(0x10000000);
if ( fp == NULL )
{
printf( "open file error\n" );
exit( -3 );
}
progsrcsz = fread( progsrc, sizeof(char), 0x10000000, fp );
fclose( fp );
prog = clCreateProgramWithSource( ocl->context, 1,
(const char **)(&progsrc),
(const size_t *)(&progsrcsz), &ret );
if ( ret != CL_SUCCESS )
{
printf( "clCreateProgramWithSource fail\n" );
exit( -3 );
}
strcpy( clArgs, "-I " );
strcat( clArgs, rt_cl_include_path );
ret = clBuildProgram( prog, 1, devID[0],
clArgs, NULL, NULL );
if ( ret != CL_SUCCESS )
{
size_t log_size;
char *log;
clGetProgramBuildInfo( prog, devID[0][0],
CL_PROGRAM_BUILD_LOG, 0, NULL, &log_size );
log = (char *) malloc(log_size);
clGetProgramBuildInfo( prog, devID[0][0],
CL_PROGRAM_BUILD_LOG, log_size, log, NULL );
printf( "clBuildProgram fail:\n" );
printf("%s\n", log);
exit( -3 );
}
ocl->raytrace = clCreateKernel( prog, "raytrace", &ret );
}
void rt_opencl_render( rt_render_pipe *pRp, rt_box *pBoundingBox,
cl_mem *memi, cl_mem *memn )
{
rt_raytrace_args *rtArgs;
rt_opencl_content *pOcl = &(pRp->oclContent);
cl_mem mema;
cl_mem memout;
if ( pRp == NULL )
exit( -1 );
// first arg
mema = clCreateBuffer( pOcl->context, CL_MEM_READ_ONLY,
sizeof(rt_raytrace_args), NULL, NULL );
rtArgs = clEnqueueMapBuffer( pOcl->commQue, mema, CL_TRUE, CL_MAP_WRITE, 0,
sizeof(rt_raytrace_args), 0, NULL, NULL, NULL );
rtArgs->primsCount = pRp->primsCount;
rtArgs->trianglesCount = pRp->trianglesCount;
rtArgs->vertexCount = pRp->vertexCount;
rtArgs->lightsCount = pRp->lightsCount;
rtArgs->w = pRp->w;
rtArgs->h = pRp->h;
rtArgs->xdelta = 1;
rtArgs->ydelta = 1;
rtArgs->boundingBox = *pBoundingBox;
clEnqueueUnmapMemObject( pOcl->commQue, mema, rtArgs, 0,
NULL, NULL );
// output arg
memout = clCreateBuffer( pOcl->context, CL_MEM_WRITE_ONLY,
sizeof(rt_argb)*(pRp->w)*(pRp->h), NULL, NULL );
// enqueue threads
{
size_t gwSz[2] = { pRp->w + ( 32 - (pRp->w % 32) ),
pRp->h + ( 32 - (pRp->h % 32) ) };
clSetKernelArg( pOcl->raytrace, 0,
sizeof(cl_mem), (void *) &mema );
clSetKernelArg( pOcl->raytrace, 1,
sizeof(cl_mem), (void *) &(pRp->memp) );
clSetKernelArg( pOcl->raytrace, 2,
sizeof(cl_mem), (void *) &(pRp->mempdecs) );
clSetKernelArg( pOcl->raytrace, 3,
sizeof(cl_mem), (void *) &(pRp->meml) );
clSetKernelArg( pOcl->raytrace, 4,
sizeof(cl_mem), (void *) &(pRp->memldecs) );
clSetKernelArg( pOcl->raytrace, 5,
sizeof(cl_mem), (void *) &(pRp->memc) );
clSetKernelArg( pOcl->raytrace, 6,
sizeof(cl_mem), (void *) &(pRp->memm) );
clSetKernelArg( pOcl->raytrace, 7,
sizeof(cl_mem), (void *) &(pRp->memt) );
clSetKernelArg( pOcl->raytrace, 8,
sizeof(cl_mem), (void *) &(pRp->memv) );
clSetKernelArg( pOcl->raytrace, 9,
sizeof(cl_mem), (void *) memn );
clSetKernelArg( pOcl->raytrace, 10,
sizeof(cl_mem), (void *) memi );
clSetKernelArg( pOcl->raytrace, 11,
sizeof(cl_mem), (void *) &memout );
clEnqueueNDRangeKernel( pOcl->commQue, pOcl->raytrace, 2,
NULL, gwSz, pOcl->workGroupSz, 0, NULL, NULL );
}
clEnqueueReadBuffer( pOcl->commQue, memout, CL_TRUE, 0,
(pRp->w) * (pRp->h) * sizeof(rt_argb), pRp->screenData,
0, NULL, NULL );
clReleaseMemObject( mema );
clReleaseMemObject( memout );
}
void rt_render_pipe_cleanup( rt_render_pipe *pRp )
{
if ( pRp == NULL )
exit( -1 );
free( pRp->screenData );
clReleaseMemObject( pRp->memp );
clReleaseMemObject( pRp->mempdecs );
clReleaseMemObject( pRp->meml );
clReleaseMemObject( pRp->memldecs );
clReleaseMemObject( pRp->memt );
clReleaseMemObject( pRp->memv );
clReleaseMemObject( pRp->memm );
}
void *rt_compute_sah_help_thread( void *pArgs )
{
rt_compute_sah_help_args *args = (rt_compute_sah_help_args *)pArgs;
rt_compute_sah_help_return *rets = malloc(sizeof(rt_compute_sah_help_return));
int end = SAH_PARTS / COMPUTE_SAH_THREADS * args->threadId + SAH_PARTS / COMPUTE_SAH_THREADS;
int i;
int b = 1;
float extents_xy_area = args->pBox->extents.x * args->pBox->extents.y,
extents_yz_area = args->pBox->extents.y * args->pBox->extents.z,
extents_xz_area = args->pBox->extents.x * args->pBox->extents.z;
rt_vertex *memVer = args->memVer;
if ( pArgs == NULL )
exit( -1 );
switch ( args->axis )
{
case RT_AXIS_X:
for ( i = SAH_PARTS / COMPUTE_SAH_THREADS * args->threadId; i < end; ++i )
{
float sep = args->min + i * args->delta;
float sah;
int j;
rt_ulong tmpPrimsCountL = 0;
rt_ulong tmpPrimsCountR = 0;
for ( j = 0; j < args->primsCount; ++j )
{
float maxV, minV;
rt_triangle *tmpTr = args->memTr + (args->memTp)[j];
maxV = memVer[tmpTr->pV0].pos.x;
if ( maxV < memVer[tmpTr->pV1].pos.x )
maxV = memVer[tmpTr->pV1].pos.x;
if ( maxV < memVer[tmpTr->pV2].pos.x )
maxV = memVer[tmpTr->pV2].pos.x;
minV = memVer[tmpTr->pV0].pos.x;
if ( minV > memVer[tmpTr->pV1].pos.x )
minV = memVer[tmpTr->pV1].pos.x;
if ( minV > memVer[tmpTr->pV2].pos.x )
minV = memVer[tmpTr->pV2].pos.x;
if ( minV < sep )
++tmpPrimsCountL;
if ( maxV > sep )
++tmpPrimsCountR;
}
sah = ( extents_yz_area
+ (sep - args->pBox->center.x + args->pBox->extents.x)
* (args->pBox->extents.y + args->pBox->extents.z) )
* tmpPrimsCountL
+
( extents_yz_area
+ (args->pBox->center.x + args->pBox->extents.x - sep)
* (args->pBox->extents.y + args->pBox->extents.z) )
* tmpPrimsCountR;
if ( b || sah < rets->resSAH )
{
rets->resSAH = sah;
rets->resSep = sep;
rets->resPrimsL = tmpPrimsCountL;
rets->resPrimsR = tmpPrimsCountR;
b = 0;
}
}
break;
case RT_AXIS_Y:
for ( i = SAH_PARTS / COMPUTE_SAH_THREADS * args->threadId; i < end; ++i )
{
float sep = args->min + i * args->delta;
float sah;
int j;
rt_ulong tmpPrimsCountL = 0;
rt_ulong tmpPrimsCountR = 0;
for ( j = 0; j < args->primsCount; ++j )
{
float maxV, minV;
rt_triangle *tmpTr = args->memTr + (args->memTp)[j];
maxV = memVer[tmpTr->pV0].pos.y;
if ( maxV < memVer[tmpTr->pV1].pos.y )
maxV = memVer[tmpTr->pV1].pos.y;
if ( maxV < memVer[tmpTr->pV2].pos.y )
maxV = memVer[tmpTr->pV2].pos.y;
minV = memVer[tmpTr->pV0].pos.y;
if ( minV > memVer[tmpTr->pV1].pos.y )
minV = memVer[tmpTr->pV1].pos.y;
if ( minV > memVer[tmpTr->pV2].pos.y )
minV = memVer[tmpTr->pV2].pos.y;
if ( minV < sep )
++tmpPrimsCountL;
if ( maxV > sep )
++tmpPrimsCountR;
}
sah = ( extents_xz_area
+ (sep - args->pBox->center.y + args->pBox->extents.y)
* (args->pBox->extents.x + args->pBox->extents.z) )
* tmpPrimsCountL
+
( extents_xz_area
+ (args->pBox->center.y + args->pBox->extents.y - sep)
* (args->pBox->extents.x + args->pBox->extents.z) )
* tmpPrimsCountR;
if ( b || sah < rets->resSAH )
{
rets->resSAH = sah;
rets->resSep = sep;
rets->resPrimsL = tmpPrimsCountL;
rets->resPrimsR = tmpPrimsCountR;
b = 0;
}
}
break;
case RT_AXIS_Z:
for ( i = SAH_PARTS / COMPUTE_SAH_THREADS * args->threadId; i < end; ++i )
{
float sep = args->min + i * args->delta;
float sah;
int j;
rt_ulong tmpPrimsCountL = 0;
rt_ulong tmpPrimsCountR = 0;
for ( j = 0; j < args->primsCount; ++j )
{
float maxV, minV;
rt_triangle *tmpTr = args->memTr + (args->memTp)[j];
maxV = memVer[tmpTr->pV0].pos.z;
if ( maxV < memVer[tmpTr->pV1].pos.z )
maxV = memVer[tmpTr->pV1].pos.z;
if ( maxV < memVer[tmpTr->pV2].pos.z )
maxV = memVer[tmpTr->pV2].pos.z;
minV = memVer[tmpTr->pV0].pos.z;
if ( minV > memVer[tmpTr->pV1].pos.z )
minV = memVer[tmpTr->pV1].pos.z;
if ( minV > memVer[tmpTr->pV2].pos.z )
minV = memVer[tmpTr->pV2].pos.z;
if ( minV < sep )
++tmpPrimsCountL;
if ( maxV > sep )
++tmpPrimsCountR;
}
sah = ( extents_xy_area
+ (sep - args->pBox->center.z + args->pBox->extents.z)
* (args->pBox->extents.x + args->pBox->extents.y) )
* tmpPrimsCountL
+
( extents_xy_area
+ (args->pBox->center.z + args->pBox->extents.z - sep)
* (args->pBox->extents.x + args->pBox->extents.y) )
* tmpPrimsCountR;
if ( b || sah < rets->resSAH )
{
rets->resSAH = sah;
rets->resSep = sep;
rets->resPrimsL = tmpPrimsCountL;
rets->resPrimsR = tmpPrimsCountR;
b = 0;
}
}
break;
}
return rets;
}
void rt_kdtree_compute_sah( rt_ulong *memTp, rt_triangle *memTr,
rt_vertex *memVer, rt_ulong primsCount, RT_AXIS axis,
rt_box *pBox, rt_ulong *primsCountL, rt_ulong *primsCountR,
float *pSep )
{
float min, max;
float delta;
int i;
if ( (memTp == NULL) || (memTr == NULL) || (memVer == NULL)
|| (pBox == NULL) || (primsCountL == NULL)
|| (primsCountR == NULL) || (pSep == NULL) )
exit( -1 );
switch ( axis )
{
case RT_AXIS_X:
min = pBox->center.x - pBox->extents.x;
max = pBox->center.x + pBox->extents.x;
break;
case RT_AXIS_Y:
min = pBox->center.y - pBox->extents.y;
max = pBox->center.y + pBox->extents.y;
break;
case RT_AXIS_Z:
min = pBox->center.z - pBox->extents.z;
max = pBox->center.z + pBox->extents.z;
break;
}
delta = (max - min) / (float) SAH_PARTS;
{
pthread_t *thrs = (pthread_t *) malloc( sizeof(pthread_t) * COMPUTE_SAH_THREADS );
rt_compute_sah_help_args *prms = (rt_compute_sah_help_args *) malloc(
sizeof(rt_compute_sah_help_args) * COMPUTE_SAH_THREADS );
rt_compute_sah_help_return **rets = (rt_compute_sah_help_return **) malloc(
sizeof(rt_compute_sah_help_return *) * COMPUTE_SAH_THREADS );
float minSAH;
int minID;
for ( i = 0; i < COMPUTE_SAH_THREADS; ++i )
{
prms[i].pBox = pBox;
prms[i].memTp = memTp;
prms[i].memTr = memTr;
prms[i].memVer = memVer;
prms[i].primsCount = primsCount;
prms[i].min = min;
prms[i].delta = delta;
prms[i].threadId = i;
prms[i].axis = axis;
pthread_create( thrs + i, NULL, &rt_compute_sah_help_thread,
(void *)(prms + i) );
}
for ( i = 0; i < COMPUTE_SAH_THREADS; ++i )
pthread_join( thrs[i], (void *)(rets + i) );
minID = 0;
minSAH = rets[0]->resSAH;
for ( i = 0; i < COMPUTE_SAH_THREADS; ++i )
if ( rets[i]->resSAH < minSAH )
{
minID = i;
minSAH = rets[i]->resSAH;
}
*primsCountL = rets[minID]->resPrimsL;
*primsCountR = rets[minID]->resPrimsR;
*pSep = rets[minID]->resSep;
free(thrs);
free(prms);
for ( i = 0; i < COMPUTE_SAH_THREADS; ++i )
free(rets[i]);
free(rets);
}
}
//with destruction
rt_kdtree_count_info rt_kdtree_pack_to_buffer( rt_cl_kdtree_node *pNodeBuf,
rt_ulong *pPrimsIdxBuf, rt_kdtree_node *pNode,
rt_ulong writePos, rt_ulong primsWritePos )
{
rt_kdtree_count_info leftChilds, rightChilds;
if ( (pNodeBuf == NULL) || (pNode == NULL) )
exit( -1 );
pNodeBuf[writePos].isLast = pNode->isLast;
if ( pNode->isLast )
{
rt_kdtree_count_info tmpCntI;
tmpCntI.nodesCount = 1;
tmpCntI.primsCount = pNode->primsCount;
pNodeBuf[writePos].primsCount = pNode->primsCount;
pNodeBuf[writePos].prims = primsWritePos;
memcpy( pPrimsIdxBuf + primsWritePos, pNode->prims,
sizeof(rt_ulong) * pNode->primsCount );
free( pNode->prims );
return tmpCntI;
}
leftChilds = rt_kdtree_pack_to_buffer( pNodeBuf, pPrimsIdxBuf,
pNode->leftNode, writePos + 1, primsWritePos );
rightChilds = rt_kdtree_pack_to_buffer( pNodeBuf, pPrimsIdxBuf,
pNode->rightNode, writePos + leftChilds.nodesCount + 1,
primsWritePos + leftChilds.primsCount );
pNodeBuf[writePos].sep = pNode->sep;
pNodeBuf[writePos].axis = pNode->axis;
pNodeBuf[writePos].leftNode = writePos + 1;
pNodeBuf[writePos].rightNode = writePos + leftChilds.nodesCount + 1;
free( pNode );
{
rt_kdtree_count_info tmpCntI;
tmpCntI.nodesCount = leftChilds.nodesCount
+ rightChilds.nodesCount + 1;
tmpCntI.primsCount = leftChilds.primsCount
+ rightChilds.primsCount;
return tmpCntI;
}
}
rt_kdtree_count_info rt_kdtree_make_childs( rt_vertex *memVer,
rt_triangle *memTr, rt_kdtree_node *pNode, rt_box *bbox, int depth )
{
float range = bbox->extents.x;
rt_ulong i, j, k;
rt_box tmpBoxL, tmpBoxR;
if ( (memVer == NULL) || (memTr == NULL)
|| (pNode == NULL) || (bbox == NULL) )
exit( -1 );
// cheking conditions for end of recursion
if ( pNode->primsCount <= MAX_PRIMS_IN_NODE
|| depth == MAX_DEPTH )
{
rt_kdtree_count_info tmpCntI;
pNode->isLast = 1;
pNode->leftNode = NULL;
pNode->rightNode = NULL;
tmpCntI.primsCount = pNode->primsCount;
tmpCntI.nodesCount = 1;
return tmpCntI;
}
else
pNode->isLast = 0;
// choosing axis for separation
pNode->axis = RT_AXIS_X;
if ( range < bbox->extents.y )
{
range = bbox->extents.y;
pNode->axis = RT_AXIS_Y;
}
if ( range < bbox->extents.z )
{
range = bbox->extents.z;
pNode->axis = RT_AXIS_Z;
}
// computing SAH
pNode->leftNode = malloc( sizeof(rt_kdtree_node) );
pNode->rightNode = malloc( sizeof(rt_kdtree_node) );
rt_kdtree_compute_sah( pNode->prims, memTr, memVer, pNode->primsCount,
pNode->axis, bbox, &(pNode->leftNode->primsCount),
&(pNode->rightNode->primsCount), &(pNode->sep) );
pNode->leftNode->prims = malloc( sizeof(rt_ulong) * pNode->leftNode->primsCount );
pNode->rightNode->prims = malloc( sizeof(rt_ulong) * pNode->rightNode->primsCount );
// place prims into node
j = k = 0;
for ( i = 0; i < pNode->primsCount; ++i )
{
float maxV, minV;
rt_triangle *tmpTr = memTr + pNode->prims[i];
switch ( pNode->axis )
{
case RT_AXIS_X:
maxV = memVer[tmpTr->pV0].pos.x;
if ( maxV < memVer[tmpTr->pV1].pos.x )
maxV = memVer[tmpTr->pV1].pos.x;
if ( maxV < memVer[tmpTr->pV2].pos.x )
maxV = memVer[tmpTr->pV2].pos.x;
minV = memVer[tmpTr->pV0].pos.x;
if ( minV > memVer[tmpTr->pV1].pos.x )
minV = memVer[tmpTr->pV1].pos.x;
if ( minV > memVer[tmpTr->pV2].pos.x )
minV = memVer[tmpTr->pV2].pos.x;
break;
case RT_AXIS_Y:
maxV = memVer[tmpTr->pV0].pos.y;
if ( maxV < memVer[tmpTr->pV1].pos.y )
maxV = memVer[tmpTr->pV1].pos.y;
if ( maxV < memVer[tmpTr->pV2].pos.y )
maxV = memVer[tmpTr->pV2].pos.y;