641 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
		
		
			
		
	
	
			641 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
|  | 
 | ||
|  | /*! \file gim_tri_collision.h
 | ||
|  | \author Francisco Leon Najera | ||
|  | */ | ||
|  | /*
 | ||
|  | ----------------------------------------------------------------------------- | ||
|  | This source file is part of GIMPACT Library. | ||
|  | 
 | ||
|  | For the latest info, see http://gimpact.sourceforge.net/
 | ||
|  | 
 | ||
|  | Copyright (c) 2006 Francisco Leon Najera. C.C. 80087371. | ||
|  | email: projectileman@yahoo.com | ||
|  | 
 | ||
|  |  This library is free software; you can redistribute it and/or | ||
|  |  modify it under the terms of EITHER: | ||
|  |    (1) The GNU Lesser General Public License as published by the Free | ||
|  |        Software Foundation; either version 2.1 of the License, or (at | ||
|  |        your option) any later version. The text of the GNU Lesser | ||
|  |        General Public License is included with this library in the | ||
|  |        file GIMPACT-LICENSE-LGPL.TXT. | ||
|  |    (2) The BSD-style license that is included with this library in | ||
|  |        the file GIMPACT-LICENSE-BSD.TXT. | ||
|  |    (3) The zlib/libpng license that is included with this library in | ||
|  |        the file GIMPACT-LICENSE-ZLIB.TXT. | ||
|  | 
 | ||
|  |  This library 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 files | ||
|  |  GIMPACT-LICENSE-LGPL.TXT, GIMPACT-LICENSE-ZLIB.TXT and GIMPACT-LICENSE-BSD.TXT for more details. | ||
|  | 
 | ||
|  | ----------------------------------------------------------------------------- | ||
|  | */ | ||
|  | 
 | ||
|  | #include "gim_tri_collision.h"
 | ||
|  | 
 | ||
|  | 
 | ||
|  | #define TRI_LOCAL_EPSILON 0.000001f
 | ||
|  | #define MIN_EDGE_EDGE_DIS 0.00001f
 | ||
|  | 
 | ||
|  | 
 | ||
|  | class GIM_TRIANGLE_CALCULATION_CACHE | ||
|  | { | ||
|  | public: | ||
|  | 	GREAL margin;	 | ||
|  | 	btVector3 tu_vertices[3]; | ||
|  | 	btVector3 tv_vertices[3]; | ||
|  | 	btVector4 tu_plane; | ||
|  | 	btVector4 tv_plane; | ||
|  | 	btVector3 closest_point_u; | ||
|  | 	btVector3 closest_point_v; | ||
|  | 	btVector3 edge_edge_dir; | ||
|  | 	btVector3 distances; | ||
|  | 	GREAL du[4]; | ||
|  | 	GREAL du0du1; | ||
|  | 	GREAL du0du2; | ||
|  | 	GREAL dv[4]; | ||
|  | 	GREAL dv0dv1; | ||
|  | 	GREAL dv0dv2;	 | ||
|  | 	btVector3 temp_points[MAX_TRI_CLIPPING]; | ||
|  | 	btVector3 temp_points1[MAX_TRI_CLIPPING]; | ||
|  | 	btVector3 contact_points[MAX_TRI_CLIPPING]; | ||
|  | 	 | ||
|  | 
 | ||
|  | 
 | ||
|  | 	//! if returns false, the faces are paralele
 | ||
|  | 	SIMD_FORCE_INLINE bool compute_intervals( | ||
|  | 					const GREAL &D0, | ||
|  | 					const GREAL &D1, | ||
|  | 					const GREAL &D2, | ||
|  | 					const GREAL &D0D1, | ||
|  | 					const GREAL &D0D2, | ||
|  | 					GREAL & scale_edge0, | ||
|  | 					GREAL & scale_edge1, | ||
|  | 					GUINT &edge_index0, | ||
|  | 					GUINT &edge_index1) | ||
|  | 	{ | ||
|  | 		if(D0D1>0.0f) | ||
|  | 		{ | ||
|  | 			/* here we know that D0D2<=0.0 */ | ||
|  | 			/* that is D0, D1 are on the same side, D2 on the other or on the plane */ | ||
|  | 			scale_edge0 = -D2/(D0-D2); | ||
|  | 			scale_edge1 = -D1/(D2-D1); | ||
|  | 			edge_index0 = 2;edge_index1 = 1; | ||
|  | 		} | ||
|  | 		else if(D0D2>0.0f) | ||
|  | 		{ | ||
|  | 			/* here we know that d0d1<=0.0 */ | ||
|  | 			scale_edge0 = -D0/(D1-D0); | ||
|  | 			scale_edge1 = -D1/(D2-D1); | ||
|  | 			edge_index0 = 0;edge_index1 = 1; | ||
|  | 		} | ||
|  | 		else if(D1*D2>0.0f || D0!=0.0f) | ||
|  | 		{ | ||
|  | 			/* here we know that d0d1<=0.0 or that D0!=0.0 */ | ||
|  | 			scale_edge0 = -D0/(D1-D0); | ||
|  | 			scale_edge1 = -D2/(D0-D2); | ||
|  | 			edge_index0 = 0 ;edge_index1 = 2; | ||
|  | 		} | ||
|  | 		else | ||
|  | 		{ | ||
|  | 			return false; | ||
|  | 		} | ||
|  | 		return true; | ||
|  | 	} | ||
|  | 
 | ||
|  | 
 | ||
|  | 	//! clip triangle
 | ||
|  | 	/*!
 | ||
|  | 	*/ | ||
|  | 	SIMD_FORCE_INLINE GUINT clip_triangle( | ||
|  | 		const btVector4 & tri_plane, | ||
|  | 		const btVector3 * tripoints, | ||
|  | 		const btVector3 * srcpoints, | ||
|  | 		btVector3 * clip_points) | ||
|  | 	{ | ||
|  | 		// edge 0
 | ||
|  | 
 | ||
|  | 		btVector4 edgeplane; | ||
|  | 
 | ||
|  | 		EDGE_PLANE(tripoints[0],tripoints[1],tri_plane,edgeplane); | ||
|  | 
 | ||
|  | 		GUINT clipped_count = PLANE_CLIP_TRIANGLE3D( | ||
|  | 			edgeplane,srcpoints[0],srcpoints[1],srcpoints[2],temp_points); | ||
|  | 
 | ||
|  | 		if(clipped_count == 0) return 0; | ||
|  | 
 | ||
|  | 		// edge 1
 | ||
|  | 
 | ||
|  | 		EDGE_PLANE(tripoints[1],tripoints[2],tri_plane,edgeplane); | ||
|  | 
 | ||
|  | 		clipped_count = PLANE_CLIP_POLYGON3D( | ||
|  | 			edgeplane,temp_points,clipped_count,temp_points1); | ||
|  | 
 | ||
|  | 		if(clipped_count == 0) return 0; | ||
|  | 
 | ||
|  | 		// edge 2
 | ||
|  | 
 | ||
|  | 		EDGE_PLANE(tripoints[2],tripoints[0],tri_plane,edgeplane); | ||
|  | 
 | ||
|  | 		clipped_count = PLANE_CLIP_POLYGON3D( | ||
|  | 			edgeplane,temp_points1,clipped_count,clip_points); | ||
|  | 
 | ||
|  | 		return clipped_count; | ||
|  | 
 | ||
|  | 
 | ||
|  | 		/*GUINT i0 = (tri_plane.closestAxis()+1)%3;
 | ||
|  | 		GUINT i1 = (i0+1)%3; | ||
|  | 		// edge 0
 | ||
|  | 		btVector3 temp_points[MAX_TRI_CLIPPING]; | ||
|  | 		btVector3 temp_points1[MAX_TRI_CLIPPING]; | ||
|  | 
 | ||
|  | 		GUINT clipped_count= PLANE_CLIP_TRIANGLE_GENERIC( | ||
|  | 			0,srcpoints[0],srcpoints[1],srcpoints[2],temp_points, | ||
|  | 			DISTANCE_EDGE(tripoints[0],tripoints[1],i0,i1)); | ||
|  | 		 | ||
|  | 		 | ||
|  | 		if(clipped_count == 0) return 0; | ||
|  | 
 | ||
|  | 		// edge 1
 | ||
|  | 		clipped_count = PLANE_CLIP_POLYGON_GENERIC( | ||
|  | 			0,temp_points,clipped_count,temp_points1, | ||
|  | 			DISTANCE_EDGE(tripoints[1],tripoints[2],i0,i1)); | ||
|  | 
 | ||
|  | 		if(clipped_count == 0) return 0; | ||
|  | 
 | ||
|  | 		// edge 2
 | ||
|  | 		clipped_count = PLANE_CLIP_POLYGON_GENERIC( | ||
|  | 			0,temp_points1,clipped_count,clipped_points, | ||
|  | 			DISTANCE_EDGE(tripoints[2],tripoints[0],i0,i1)); | ||
|  | 
 | ||
|  | 		return clipped_count;*/ | ||
|  | 	} | ||
|  | 
 | ||
|  | 	SIMD_FORCE_INLINE void sort_isect( | ||
|  | 		GREAL & isect0,GREAL & isect1,GUINT &e0,GUINT &e1,btVector3 & vec0,btVector3 & vec1) | ||
|  | 	{ | ||
|  | 		if(isect1<isect0) | ||
|  | 		{ | ||
|  | 			//swap
 | ||
|  | 			GIM_SWAP_NUMBERS(isect0,isect1); | ||
|  | 			GIM_SWAP_NUMBERS(e0,e1); | ||
|  | 			btVector3 tmp = vec0; | ||
|  | 			vec0 = vec1; | ||
|  | 			vec1 = tmp; | ||
|  | 		} | ||
|  | 	} | ||
|  | 
 | ||
|  | 	//! Test verifying interval intersection with the direction between planes
 | ||
|  | 	/*!
 | ||
|  | 	\pre tv_plane and tu_plane must be set | ||
|  | 	\post | ||
|  | 	distances[2] is set with the distance | ||
|  | 	closest_point_u, closest_point_v, edge_edge_dir are set too | ||
|  | 	\return | ||
|  | 	- 0: faces are paralele | ||
|  | 	- 1: face U casts face V | ||
|  | 	- 2: face V casts face U | ||
|  | 	- 3: nearest edges | ||
|  | 	*/ | ||
|  | 	SIMD_FORCE_INLINE GUINT cross_line_intersection_test() | ||
|  | 	{ | ||
|  | 		// Compute direction of intersection line
 | ||
|  | 		edge_edge_dir = tu_plane.cross(tv_plane); | ||
|  | 		GREAL Dlen; | ||
|  | 		VEC_LENGTH(edge_edge_dir,Dlen); | ||
|  | 
 | ||
|  | 		if(Dlen<0.0001) | ||
|  | 		{ | ||
|  | 			return 0; //faces near paralele
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		edge_edge_dir*= 1/Dlen;//normalize
 | ||
|  | 
 | ||
|  | 
 | ||
|  | 		// Compute interval for triangle 1
 | ||
|  | 		GUINT tu_e0,tu_e1;//edge indices
 | ||
|  | 		GREAL tu_scale_e0,tu_scale_e1;//edge scale
 | ||
|  | 		if(!compute_intervals(du[0],du[1],du[2], | ||
|  | 			du0du1,du0du2,tu_scale_e0,tu_scale_e1,tu_e0,tu_e1)) return 0; | ||
|  | 
 | ||
|  | 		// Compute interval for triangle 2
 | ||
|  | 		GUINT tv_e0,tv_e1;//edge indices
 | ||
|  | 		GREAL tv_scale_e0,tv_scale_e1;//edge scale
 | ||
|  | 
 | ||
|  | 		if(!compute_intervals(dv[0],dv[1],dv[2], | ||
|  | 			dv0dv1,dv0dv2,tv_scale_e0,tv_scale_e1,tv_e0,tv_e1)) return 0; | ||
|  | 
 | ||
|  | 		//proyected vertices
 | ||
|  | 		btVector3 up_e0 = tu_vertices[tu_e0].lerp(tu_vertices[(tu_e0+1)%3],tu_scale_e0); | ||
|  | 		btVector3 up_e1 = tu_vertices[tu_e1].lerp(tu_vertices[(tu_e1+1)%3],tu_scale_e1); | ||
|  | 
 | ||
|  | 		btVector3 vp_e0 = tv_vertices[tv_e0].lerp(tv_vertices[(tv_e0+1)%3],tv_scale_e0); | ||
|  | 		btVector3 vp_e1 = tv_vertices[tv_e1].lerp(tv_vertices[(tv_e1+1)%3],tv_scale_e1); | ||
|  | 
 | ||
|  | 		//proyected intervals
 | ||
|  | 		GREAL isect_u[] = {up_e0.dot(edge_edge_dir),up_e1.dot(edge_edge_dir)}; | ||
|  | 		GREAL isect_v[] = {vp_e0.dot(edge_edge_dir),vp_e1.dot(edge_edge_dir)}; | ||
|  | 
 | ||
|  | 		sort_isect(isect_u[0],isect_u[1],tu_e0,tu_e1,up_e0,up_e1); | ||
|  | 		sort_isect(isect_v[0],isect_v[1],tv_e0,tv_e1,vp_e0,vp_e1); | ||
|  | 
 | ||
|  | 		const GREAL midpoint_u = 0.5f*(isect_u[0]+isect_u[1]); // midpoint
 | ||
|  | 		const GREAL midpoint_v = 0.5f*(isect_v[0]+isect_v[1]); // midpoint
 | ||
|  | 
 | ||
|  | 		if(midpoint_u<midpoint_v) | ||
|  | 		{ | ||
|  | 			if(isect_u[1]>=isect_v[1]) // face U casts face V
 | ||
|  | 			{ | ||
|  | 				return 1; | ||
|  | 			} | ||
|  | 			else if(isect_v[0]<=isect_u[0]) // face V casts face U
 | ||
|  | 			{ | ||
|  | 				return 2; | ||
|  | 			} | ||
|  | 			// closest points
 | ||
|  | 			closest_point_u = up_e1; | ||
|  | 			closest_point_v = vp_e0; | ||
|  | 			// calc edges and separation
 | ||
|  | 
 | ||
|  | 			if(isect_u[1]+ MIN_EDGE_EDGE_DIS<isect_v[0]) //calc distance between two lines instead
 | ||
|  | 			{ | ||
|  | 				SEGMENT_COLLISION( | ||
|  | 					tu_vertices[tu_e1],tu_vertices[(tu_e1+1)%3], | ||
|  | 					tv_vertices[tv_e0],tv_vertices[(tv_e0+1)%3], | ||
|  | 					closest_point_u, | ||
|  | 					closest_point_v); | ||
|  | 
 | ||
|  | 				edge_edge_dir = closest_point_u-closest_point_v; | ||
|  | 				VEC_LENGTH(edge_edge_dir,distances[2]); | ||
|  | 				edge_edge_dir *= 1.0f/distances[2];// normalize
 | ||
|  | 			} | ||
|  | 			else | ||
|  | 			{ | ||
|  | 				distances[2] = isect_v[0]-isect_u[1];//distance negative
 | ||
|  | 				//edge_edge_dir *= -1.0f; //normal pointing from V to U
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 		} | ||
|  | 		else | ||
|  | 		{ | ||
|  | 			if(isect_v[1]>=isect_u[1]) // face V casts face U
 | ||
|  | 			{ | ||
|  | 				return 2; | ||
|  | 			} | ||
|  | 			else if(isect_u[0]<=isect_v[0]) // face U casts face V
 | ||
|  | 			{ | ||
|  | 				return 1; | ||
|  | 			} | ||
|  | 			// closest points
 | ||
|  | 			closest_point_u = up_e0; | ||
|  | 			closest_point_v = vp_e1; | ||
|  | 			// calc edges and separation
 | ||
|  | 
 | ||
|  | 			if(isect_v[1]+MIN_EDGE_EDGE_DIS<isect_u[0]) //calc distance between two lines instead
 | ||
|  | 			{ | ||
|  | 				SEGMENT_COLLISION( | ||
|  | 					tu_vertices[tu_e0],tu_vertices[(tu_e0+1)%3], | ||
|  | 					tv_vertices[tv_e1],tv_vertices[(tv_e1+1)%3], | ||
|  | 					closest_point_u, | ||
|  | 					closest_point_v); | ||
|  | 
 | ||
|  | 				edge_edge_dir = closest_point_u-closest_point_v; | ||
|  | 				VEC_LENGTH(edge_edge_dir,distances[2]); | ||
|  | 				edge_edge_dir *= 1.0f/distances[2];// normalize
 | ||
|  | 			} | ||
|  | 			else | ||
|  | 			{ | ||
|  | 				distances[2] = isect_u[0]-isect_v[1];//distance negative
 | ||
|  | 				//edge_edge_dir *= -1.0f; //normal pointing from V to U
 | ||
|  | 			} | ||
|  | 		} | ||
|  | 		return 3; | ||
|  | 	} | ||
|  | 
 | ||
|  | 
 | ||
|  | 	//! collides by two sides
 | ||
|  | 	SIMD_FORCE_INLINE bool triangle_collision( | ||
|  | 					const btVector3 & u0, | ||
|  | 					const btVector3 & u1, | ||
|  | 					const btVector3 & u2, | ||
|  | 					GREAL margin_u, | ||
|  | 					const btVector3 & v0, | ||
|  | 					const btVector3 & v1, | ||
|  | 					const btVector3 & v2, | ||
|  | 					GREAL margin_v, | ||
|  | 					GIM_TRIANGLE_CONTACT_DATA & contacts) | ||
|  | 	{ | ||
|  | 
 | ||
|  | 		margin = margin_u + margin_v; | ||
|  | 
 | ||
|  | 		tu_vertices[0] = u0; | ||
|  | 		tu_vertices[1] = u1; | ||
|  | 		tu_vertices[2] = u2; | ||
|  | 
 | ||
|  | 		tv_vertices[0] = v0; | ||
|  | 		tv_vertices[1] = v1; | ||
|  | 		tv_vertices[2] = v2; | ||
|  | 
 | ||
|  | 		//create planes
 | ||
|  | 		// plane v vs U points
 | ||
|  | 
 | ||
|  | 		TRIANGLE_PLANE(tv_vertices[0],tv_vertices[1],tv_vertices[2],tv_plane); | ||
|  | 
 | ||
|  | 		du[0] = DISTANCE_PLANE_POINT(tv_plane,tu_vertices[0]); | ||
|  | 		du[1] = DISTANCE_PLANE_POINT(tv_plane,tu_vertices[1]); | ||
|  | 		du[2] = DISTANCE_PLANE_POINT(tv_plane,tu_vertices[2]); | ||
|  | 
 | ||
|  | 
 | ||
|  | 		du0du1 = du[0] * du[1]; | ||
|  | 		du0du2 = du[0] * du[2]; | ||
|  | 
 | ||
|  | 
 | ||
|  | 		if(du0du1>0.0f && du0du2>0.0f)	// same sign on all of them + not equal 0 ?
 | ||
|  | 		{ | ||
|  | 			if(du[0]<0) //we need test behind the triangle plane
 | ||
|  | 			{ | ||
|  | 				distances[0] = GIM_MAX3(du[0],du[1],du[2]); | ||
|  | 				distances[0] = -distances[0]; | ||
|  | 				if(distances[0]>margin) return false; //never intersect
 | ||
|  | 
 | ||
|  | 				//reorder triangle v
 | ||
|  | 				VEC_SWAP(tv_vertices[0],tv_vertices[1]); | ||
|  | 				VEC_SCALE_4(tv_plane,-1.0f,tv_plane); | ||
|  | 			} | ||
|  | 			else | ||
|  | 			{ | ||
|  | 				distances[0] = GIM_MIN3(du[0],du[1],du[2]); | ||
|  | 				if(distances[0]>margin) return false; //never intersect
 | ||
|  | 			} | ||
|  | 		} | ||
|  | 		else | ||
|  | 		{ | ||
|  | 			//Look if we need to invert the triangle
 | ||
|  | 			distances[0] = (du[0]+du[1]+du[2])/3.0f; //centroid
 | ||
|  | 
 | ||
|  | 			if(distances[0]<0.0f) | ||
|  | 			{ | ||
|  | 				//reorder triangle v
 | ||
|  | 				VEC_SWAP(tv_vertices[0],tv_vertices[1]); | ||
|  | 				VEC_SCALE_4(tv_plane,-1.0f,tv_plane); | ||
|  | 
 | ||
|  | 				distances[0] = GIM_MAX3(du[0],du[1],du[2]); | ||
|  | 				distances[0] = -distances[0]; | ||
|  | 			} | ||
|  | 			else | ||
|  | 			{ | ||
|  | 				distances[0] = GIM_MIN3(du[0],du[1],du[2]); | ||
|  | 			} | ||
|  | 		} | ||
|  | 
 | ||
|  | 
 | ||
|  | 		// plane U vs V points
 | ||
|  | 
 | ||
|  | 		TRIANGLE_PLANE(tu_vertices[0],tu_vertices[1],tu_vertices[2],tu_plane); | ||
|  | 
 | ||
|  | 		dv[0] = DISTANCE_PLANE_POINT(tu_plane,tv_vertices[0]); | ||
|  | 		dv[1] = DISTANCE_PLANE_POINT(tu_plane,tv_vertices[1]); | ||
|  | 		dv[2] = DISTANCE_PLANE_POINT(tu_plane,tv_vertices[2]); | ||
|  | 
 | ||
|  | 		dv0dv1 = dv[0] * dv[1]; | ||
|  | 		dv0dv2 = dv[0] * dv[2]; | ||
|  | 
 | ||
|  | 
 | ||
|  | 		if(dv0dv1>0.0f && dv0dv2>0.0f)	// same sign on all of them + not equal 0 ?
 | ||
|  | 		{ | ||
|  | 			if(dv[0]<0) //we need test behind the triangle plane
 | ||
|  | 			{ | ||
|  | 				distances[1] = GIM_MAX3(dv[0],dv[1],dv[2]); | ||
|  | 				distances[1] = -distances[1]; | ||
|  | 				if(distances[1]>margin) return false; //never intersect
 | ||
|  | 
 | ||
|  | 				//reorder triangle u
 | ||
|  | 				VEC_SWAP(tu_vertices[0],tu_vertices[1]); | ||
|  | 				VEC_SCALE_4(tu_plane,-1.0f,tu_plane); | ||
|  | 			} | ||
|  | 			else | ||
|  | 			{ | ||
|  | 				distances[1] = GIM_MIN3(dv[0],dv[1],dv[2]); | ||
|  | 				if(distances[1]>margin) return false; //never intersect
 | ||
|  | 			} | ||
|  | 		} | ||
|  | 		else | ||
|  | 		{ | ||
|  | 			//Look if we need to invert the triangle
 | ||
|  | 			distances[1] = (dv[0]+dv[1]+dv[2])/3.0f; //centroid
 | ||
|  | 
 | ||
|  | 			if(distances[1]<0.0f) | ||
|  | 			{ | ||
|  | 				//reorder triangle v
 | ||
|  | 				VEC_SWAP(tu_vertices[0],tu_vertices[1]); | ||
|  | 				VEC_SCALE_4(tu_plane,-1.0f,tu_plane); | ||
|  | 
 | ||
|  | 				distances[1] = GIM_MAX3(dv[0],dv[1],dv[2]); | ||
|  | 				distances[1] = -distances[1]; | ||
|  | 			} | ||
|  | 			else | ||
|  | 			{ | ||
|  | 				distances[1] = GIM_MIN3(dv[0],dv[1],dv[2]); | ||
|  | 			} | ||
|  | 		} | ||
|  | 
 | ||
|  | 		GUINT bl; | ||
|  | 		/* bl = cross_line_intersection_test();
 | ||
|  | 		if(bl==3) | ||
|  | 		{ | ||
|  | 			//take edge direction too
 | ||
|  | 			bl = distances.maxAxis(); | ||
|  | 		} | ||
|  | 		else | ||
|  | 		{*/ | ||
|  | 			bl = 0; | ||
|  | 			if(distances[0]<distances[1]) bl = 1; | ||
|  | 		//}
 | ||
|  | 
 | ||
|  | 		if(bl==2) //edge edge separation
 | ||
|  | 		{ | ||
|  | 			if(distances[2]>margin) return false; | ||
|  | 
 | ||
|  | 			contacts.m_penetration_depth = -distances[2] + margin; | ||
|  | 			contacts.m_points[0] = closest_point_v; | ||
|  | 			contacts.m_point_count = 1; | ||
|  | 			VEC_COPY(contacts.m_separating_normal,edge_edge_dir); | ||
|  | 
 | ||
|  | 			return true; | ||
|  | 		} | ||
|  | 
 | ||
|  | 		//clip face against other
 | ||
|  | 
 | ||
|  | 		 | ||
|  | 		GUINT point_count; | ||
|  | 		//TODO
 | ||
|  | 		if(bl == 0) //clip U points against V
 | ||
|  | 		{ | ||
|  | 			point_count = clip_triangle(tv_plane,tv_vertices,tu_vertices,contact_points); | ||
|  | 			if(point_count == 0) return false;						 | ||
|  | 			contacts.merge_points(tv_plane,margin,contact_points,point_count);			 | ||
|  | 		} | ||
|  | 		else //clip V points against U
 | ||
|  | 		{ | ||
|  | 			point_count = clip_triangle(tu_plane,tu_vertices,tv_vertices,contact_points); | ||
|  | 			if(point_count == 0) return false;			 | ||
|  | 			contacts.merge_points(tu_plane,margin,contact_points,point_count); | ||
|  | 			contacts.m_separating_normal *= -1.f; | ||
|  | 		} | ||
|  | 		if(contacts.m_point_count == 0) return false; | ||
|  | 		return true; | ||
|  | 	} | ||
|  | 
 | ||
|  | }; | ||
|  | 
 | ||
|  | 
 | ||
|  | /*class GIM_TRIANGLE_CALCULATION_CACHE
 | ||
|  | { | ||
|  | public: | ||
|  | 	GREAL margin; | ||
|  | 	GUINT clipped_count; | ||
|  | 	btVector3 tu_vertices[3]; | ||
|  | 	btVector3 tv_vertices[3]; | ||
|  | 	btVector3 temp_points[MAX_TRI_CLIPPING]; | ||
|  | 	btVector3 temp_points1[MAX_TRI_CLIPPING]; | ||
|  | 	btVector3 clipped_points[MAX_TRI_CLIPPING]; | ||
|  | 	GIM_TRIANGLE_CONTACT_DATA contacts1; | ||
|  | 	GIM_TRIANGLE_CONTACT_DATA contacts2; | ||
|  | 
 | ||
|  | 
 | ||
|  | 	//! clip triangle
 | ||
|  | 	GUINT clip_triangle( | ||
|  | 		const btVector4 & tri_plane, | ||
|  | 		const btVector3 * tripoints, | ||
|  | 		const btVector3 * srcpoints, | ||
|  | 		btVector3 * clipped_points) | ||
|  | 	{ | ||
|  | 		// edge 0
 | ||
|  | 
 | ||
|  | 		btVector4 edgeplane; | ||
|  | 
 | ||
|  | 		EDGE_PLANE(tripoints[0],tripoints[1],tri_plane,edgeplane); | ||
|  | 
 | ||
|  | 		GUINT clipped_count = PLANE_CLIP_TRIANGLE3D( | ||
|  | 			edgeplane,srcpoints[0],srcpoints[1],srcpoints[2],temp_points); | ||
|  | 
 | ||
|  | 		if(clipped_count == 0) return 0; | ||
|  | 
 | ||
|  | 		// edge 1
 | ||
|  | 
 | ||
|  | 		EDGE_PLANE(tripoints[1],tripoints[2],tri_plane,edgeplane); | ||
|  | 
 | ||
|  | 		clipped_count = PLANE_CLIP_POLYGON3D( | ||
|  | 			edgeplane,temp_points,clipped_count,temp_points1); | ||
|  | 
 | ||
|  | 		if(clipped_count == 0) return 0; | ||
|  | 
 | ||
|  | 		// edge 2
 | ||
|  | 
 | ||
|  | 		EDGE_PLANE(tripoints[2],tripoints[0],tri_plane,edgeplane); | ||
|  | 
 | ||
|  | 		clipped_count = PLANE_CLIP_POLYGON3D( | ||
|  | 			edgeplane,temp_points1,clipped_count,clipped_points); | ||
|  | 
 | ||
|  | 		return clipped_count; | ||
|  | 	} | ||
|  | 
 | ||
|  | 
 | ||
|  | 
 | ||
|  | 
 | ||
|  | 	//! collides only on one side
 | ||
|  | 	bool triangle_collision( | ||
|  | 					const btVector3 & u0, | ||
|  | 					const btVector3 & u1, | ||
|  | 					const btVector3 & u2, | ||
|  | 					GREAL margin_u, | ||
|  | 					const btVector3 & v0, | ||
|  | 					const btVector3 & v1, | ||
|  | 					const btVector3 & v2, | ||
|  | 					GREAL margin_v, | ||
|  | 					GIM_TRIANGLE_CONTACT_DATA & contacts) | ||
|  | 	{ | ||
|  | 
 | ||
|  | 		margin = margin_u + margin_v; | ||
|  | 
 | ||
|  | 		 | ||
|  | 		tu_vertices[0] = u0; | ||
|  | 		tu_vertices[1] = u1; | ||
|  | 		tu_vertices[2] = u2; | ||
|  | 
 | ||
|  | 		tv_vertices[0] = v0; | ||
|  | 		tv_vertices[1] = v1; | ||
|  | 		tv_vertices[2] = v2; | ||
|  | 
 | ||
|  | 		//create planes
 | ||
|  | 		// plane v vs U points
 | ||
|  | 
 | ||
|  | 
 | ||
|  | 		TRIANGLE_PLANE(tv_vertices[0],tv_vertices[1],tv_vertices[2],contacts1.m_separating_normal); | ||
|  | 
 | ||
|  | 		clipped_count = clip_triangle( | ||
|  | 			contacts1.m_separating_normal,tv_vertices,tu_vertices,clipped_points); | ||
|  | 
 | ||
|  | 		if(clipped_count == 0 ) | ||
|  | 		{ | ||
|  | 			 return false;//Reject
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		//find most deep interval face1
 | ||
|  | 		contacts1.merge_points(contacts1.m_separating_normal,margin,clipped_points,clipped_count); | ||
|  | 		if(contacts1.m_point_count == 0) return false; // too far
 | ||
|  | 
 | ||
|  | 		//Normal pointing to triangle1
 | ||
|  | 		//contacts1.m_separating_normal *= -1.f;
 | ||
|  | 
 | ||
|  | 		//Clip tri1 by tri2 edges
 | ||
|  | 
 | ||
|  | 		TRIANGLE_PLANE(tu_vertices[0],tu_vertices[1],tu_vertices[2],contacts2.m_separating_normal); | ||
|  | 
 | ||
|  | 		clipped_count = clip_triangle( | ||
|  | 			contacts2.m_separating_normal,tu_vertices,tv_vertices,clipped_points); | ||
|  | 
 | ||
|  | 		if(clipped_count == 0 ) | ||
|  | 		{ | ||
|  | 			 return false;//Reject
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		//find most deep interval face1
 | ||
|  | 		contacts2.merge_points(contacts2.m_separating_normal,margin,clipped_points,clipped_count); | ||
|  | 		if(contacts2.m_point_count == 0) return false; // too far
 | ||
|  | 
 | ||
|  | 		contacts2.m_separating_normal *= -1.f; | ||
|  | 
 | ||
|  | 		////check most dir for contacts
 | ||
|  | 		if(contacts2.m_penetration_depth<contacts1.m_penetration_depth) | ||
|  | 		{ | ||
|  | 			contacts.copy_from(contacts2); | ||
|  | 		} | ||
|  | 		else | ||
|  | 		{ | ||
|  | 			contacts.copy_from(contacts1); | ||
|  | 		} | ||
|  | 		return true; | ||
|  | 	} | ||
|  | 
 | ||
|  | 
 | ||
|  | };*/ | ||
|  | 
 | ||
|  | 
 | ||
|  | 
 | ||
|  | bool GIM_TRIANGLE::collide_triangle_hard_test( | ||
|  | 		const GIM_TRIANGLE & other, | ||
|  | 		GIM_TRIANGLE_CONTACT_DATA & contact_data) const | ||
|  | { | ||
|  | 	GIM_TRIANGLE_CALCULATION_CACHE calc_cache;	 | ||
|  | 	return calc_cache.triangle_collision( | ||
|  | 					m_vertices[0],m_vertices[1],m_vertices[2],m_margin, | ||
|  | 					other.m_vertices[0],other.m_vertices[1],other.m_vertices[2],other.m_margin, | ||
|  | 					contact_data); | ||
|  | 
 | ||
|  | } | ||
|  | 
 | ||
|  | 
 | ||
|  | 
 | ||
|  | 
 |