void
cpSegmentQueryInfoPrint(cpSegmentQueryInfo *info)
{
printf("Segment Query:\n");
printf("\tt: %f\n", info->t);
// printf("\tdist: %f\n", info->dist);
// printf("\tpoint: %s\n", cpvstr(info->point));
printf("\tn: %s\n", cpvstr(info->n));
}
static void
draw(void)
{
ChipmunkDemoDefaultDrawImpl();
cpVect start = QUERY_START;
cpVect end = ChipmunkDemoMouse;
ChipmunkDebugDrawSegment(start, end, RGBAColor(0,1,0,1));
ChipmunkDemoPrintString("Query: Dist(%f) Point%s, ", cpvdist(start, end), cpvstr(end));
cpSegmentQueryInfo segInfo = {};
if(cpSpaceSegmentQueryFirst(space, start, end, CP_ALL_LAYERS, CP_NO_GROUP, &segInfo)){
cpVect point = cpSegmentQueryHitPoint(start, end, segInfo);
// Draw red over the occluded part of the query
ChipmunkDebugDrawSegment(point, end, RGBAColor(1,0,0,1));
// Draw a little blue surface normal
ChipmunkDebugDrawSegment(point, cpvadd(point, cpvmult(segInfo.n, 16)), RGBAColor(0,0,1,1));
// Draw a little red dot on the hit point.
ChipmunkDebugDrawPoints(3, 1, &point, RGBAColor(1,0,0,1));
ChipmunkDemoPrintString("Segment Query: Dist(%f) Normal%s", cpSegmentQueryHitDist(start, end, segInfo), cpvstr(segInfo.n));
} else {
ChipmunkDemoPrintString("Segment Query (None)");
}
cpNearestPointQueryInfo nearestInfo = {};
cpSpaceNearestPointQueryNearest(space, ChipmunkDemoMouse, 100.0, CP_ALL_LAYERS, CP_NO_GROUP, &nearestInfo);
if(nearestInfo.shape){
// Draw a grey line to the closest shape.
ChipmunkDebugDrawPoints(3, 1, &ChipmunkDemoMouse, RGBAColor(0.5, 0.5, 0.5, 1.0));
ChipmunkDebugDrawSegment(ChipmunkDemoMouse, nearestInfo.p, RGBAColor(0.5, 0.5, 0.5, 1.0));
// Draw a red bounding box around the shape under the mouse.
if(nearestInfo.d < 0) ChipmunkDebugDrawBB(cpShapeGetBB(nearestInfo.shape), RGBAColor(1,0,0,1));
}
}
static void
update(int ticks)
{
messageString[0] = '\0';
cpVect start = cpvzero;
cpVect end = /*cpv(0, 85);//*/mousePoint;
cpVect lineEnd = end;
{
char infoString[1024];
sprintf(infoString, "Query: Dist(%f) Point%s, ", cpvdist(start, end), cpvstr(end));
strcat(messageString, infoString);
}
cpSegmentQueryInfo info = {};
if(cpSpaceSegmentQueryFirst(space, start, end, CP_ALL_LAYERS, CP_NO_GROUP, &info)){
cpVect point = cpSegmentQueryHitPoint(start, end, info);
lineEnd = cpvadd(point, cpvzero);//cpvmult(info.n, 4.0f));
char infoString[1024];
sprintf(infoString, "Segment Query: Dist(%f) Normal%s", cpSegmentQueryHitDist(start, end, info), cpvstr(info.n));
strcat(messageString, infoString);
} else {
strcat(messageString, "Segment Query (None)");
}
cpSegmentShapeSetEndpoints(querySeg, start, lineEnd);
cpShapeCacheBB(querySeg); // force it to update it's collision detection data so it will draw
// normal other stuff.
int steps = 1;
cpFloat dt = 1.0f/60.0f/(cpFloat)steps;
for(int i=0; i<steps; i++){
cpSpaceStep(space, dt);
}
}
