/*
TraceLine_r()
returns qtrue if something is hit and tracing can stop
+
+ SmileTheory: made half-iterative
*/
-static qboolean TraceLine_r( int nodeNum, vec3_t origin, vec3_t end, trace_t *trace ){
+#define TRACELINE_R_HALF_ITERATIVE 1
+
+#if TRACELINE_R_HALF_ITERATIVE
+static qboolean TraceLine_r( int nodeNum, const vec3_t start, const vec3_t end, trace_t *trace )
+#else
+static qboolean TraceLine_r( int nodeNum, const vec3_t origin, const vec3_t end, trace_t *trace )
+#endif
+{
traceNode_t *node;
int side;
float front, back, frac;
- vec3_t mid;
+ vec3_t origin, mid;
qboolean r;
+#if TRACELINE_R_HALF_ITERATIVE
+ VectorCopy( start, origin );
- /* bogus node number means solid, end tracing unless testing all */
- if ( nodeNum < 0 ) {
- VectorCopy( origin, trace->hit );
- trace->passSolid = qtrue;
- return qtrue;
- }
+ while ( 1 )
+#endif
+ {
+ /* bogus node number means solid, end tracing unless testing all */
+ if ( nodeNum < 0 ) {
+ VectorCopy( origin, trace->hit );
+ trace->passSolid = qtrue;
+ return qtrue;
+ }
- /* get node */
- node = &traceNodes[ nodeNum ];
+ /* get node */
+ node = &traceNodes[ nodeNum ];
- /* solid? */
- if ( node->type == TRACE_LEAF_SOLID ) {
- VectorCopy( origin, trace->hit );
- trace->passSolid = qtrue;
- return qtrue;
- }
+ /* solid? */
+ if ( node->type == TRACE_LEAF_SOLID ) {
+ VectorCopy( origin, trace->hit );
+ trace->passSolid = qtrue;
+ return qtrue;
+ }
- /* leafnode? */
- if ( node->type < 0 ) {
- /* note leaf and return */
- if ( node->numItems > 0 && trace->numTestNodes < MAX_TRACE_TEST_NODES ) {
- trace->testNodes[ trace->numTestNodes++ ] = nodeNum;
+ /* leafnode? */
+ if ( node->type < 0 ) {
+ /* note leaf and return */
+ if ( node->numItems > 0 && trace->numTestNodes < MAX_TRACE_TEST_NODES ) {
+ trace->testNodes[ trace->numTestNodes++ ] = nodeNum;
+ }
+ return qfalse;
}
- return qfalse;
- }
- /* ydnar 2003-09-07: don't test branches of the bsp with nothing in them when testall is enabled */
- if ( trace->testAll && node->numItems == 0 ) {
- return qfalse;
- }
+ /* ydnar 2003-09-07: don't test branches of the bsp with nothing in them when testall is enabled */
+ if ( trace->testAll && node->numItems == 0 ) {
+ return qfalse;
+ }
- /* classify beginning and end points */
- switch ( node->type )
- {
- case PLANE_X:
- front = origin[ 0 ] - node->plane[ 3 ];
- back = end[ 0 ] - node->plane[ 3 ];
- break;
+ /* classify beginning and end points */
+ switch ( node->type )
+ {
+ case PLANE_X:
+ front = origin[ 0 ] - node->plane[ 3 ];
+ back = end[ 0 ] - node->plane[ 3 ];
+ break;
- case PLANE_Y:
- front = origin[ 1 ] - node->plane[ 3 ];
- back = end[ 1 ] - node->plane[ 3 ];
- break;
+ case PLANE_Y:
+ front = origin[ 1 ] - node->plane[ 3 ];
+ back = end[ 1 ] - node->plane[ 3 ];
+ break;
- case PLANE_Z:
- front = origin[ 2 ] - node->plane[ 3 ];
- back = end[ 2 ] - node->plane[ 3 ];
- break;
+ case PLANE_Z:
+ front = origin[ 2 ] - node->plane[ 3 ];
+ back = end[ 2 ] - node->plane[ 3 ];
+ break;
- default:
- front = DotProduct( origin, node->plane ) - node->plane[ 3 ];
- back = DotProduct( end, node->plane ) - node->plane[ 3 ];
- break;
- }
+ default:
+ front = DotProduct( origin, node->plane ) - node->plane[ 3 ];
+ back = DotProduct( end, node->plane ) - node->plane[ 3 ];
+ break;
+ }
- /* entirely in front side? */
- if ( front >= -TRACE_ON_EPSILON && back >= -TRACE_ON_EPSILON ) {
- return TraceLine_r( node->children[ 0 ], origin, end, trace );
- }
+ /* entirely in front side? */
+ if ( front >= -TRACE_ON_EPSILON && back >= -TRACE_ON_EPSILON ) {
+#if TRACELINE_R_HALF_ITERATIVE
+ nodeNum = node->children[ 0 ];
+ continue;
+#else
+ return TraceLine_r( node->children[ 0 ], origin, end, trace );
+#endif
+ }
- /* entirely on back side? */
- if ( front < TRACE_ON_EPSILON && back < TRACE_ON_EPSILON ) {
- return TraceLine_r( node->children[ 1 ], origin, end, trace );
- }
+ /* entirely on back side? */
+ if ( front < TRACE_ON_EPSILON && back < TRACE_ON_EPSILON ) {
+#if TRACELINE_R_HALF_ITERATIVE
+ nodeNum = node->children[ 1 ];
+ continue;
+#else
+ return TraceLine_r( node->children[ 1 ], origin, end, trace );
+#endif
+ }
- /* select side */
- side = front < 0;
+ /* select side */
+ side = front < 0;
- /* calculate intercept point */
- frac = front / ( front - back );
- mid[ 0 ] = origin[ 0 ] + ( end[ 0 ] - origin[ 0 ] ) * frac;
- mid[ 1 ] = origin[ 1 ] + ( end[ 1 ] - origin[ 1 ] ) * frac;
- mid[ 2 ] = origin[ 2 ] + ( end[ 2 ] - origin[ 2 ] ) * frac;
+ /* calculate intercept point */
+ frac = front / ( front - back );
+ mid[ 0 ] = origin[ 0 ] + ( end[ 0 ] - origin[ 0 ] ) * frac;
+ mid[ 1 ] = origin[ 1 ] + ( end[ 1 ] - origin[ 1 ] ) * frac;
+ mid[ 2 ] = origin[ 2 ] + ( end[ 2 ] - origin[ 2 ] ) * frac;
- /* fixme: check inhibit radius, then solid nodes and ignore */
+ /* fixme: check inhibit radius, then solid nodes and ignore */
- /* set trace hit here */
- //% VectorCopy( mid, trace->hit );
+ /* set trace hit here */
+ //% VectorCopy( mid, trace->hit );
- /* trace first side */
- r = TraceLine_r( node->children[ side ], origin, mid, trace );
- if ( r ) {
- return r;
- }
+ /* trace first side */
+ if ( TraceLine_r( node->children[ side ], origin, mid, trace ) ) {
+ return qtrue;
+ }
- /* trace other side */
- return TraceLine_r( node->children[ !side ], mid, end, trace );
+ /* trace other side */
+#if TRACELINE_R_HALF_ITERATIVE
+ nodeNum = node->children[ !side ];
+ VectorCopy( mid, origin );
+#else
+ return TraceLine_r( node->children[ !side ], mid, end, trace );
+#endif
+ }
}
float SetupTrace( trace_t *trace ){
VectorSubtract( trace->end, trace->origin, trace->displacement );
- trace->distance = VectorNormalize( trace->displacement, trace->direction );
+ trace->distance = VectorFastNormalize( trace->displacement, trace->direction );
VectorCopy( trace->origin, trace->hit );
return trace->distance;
}
projects / xonotic / netradiant.git / blobdiff