//
// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
//
// This software is provided 'as-is', without any express or implied
// warranty.  In no event will the authors be held liable for any damages
// arising from the use of this software.
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
//

#define _USE_MATH_DEFINES
#include <math.h>
#include "DebugDraw.h"
#include "RecastDebugDraw.h"
#include "Recast.h"

void duDebugDrawTriMesh(duDebugDraw* dd, const float* verts, int /*nverts*/,
						const int* tris, const float* normals, int ntris,
						const unsigned char* flags)
{
	if (!dd) return;
	if (!verts) return;
	if (!tris) return;
	if (!normals) return;

	dd->begin(DU_DRAW_TRIS);
	for (int i = 0; i < ntris*3; i += 3)
	{
		unsigned int color;
		unsigned char a = (unsigned char)(150*(2+normals[i+0]+normals[i+1])/4);
		if (flags && !flags[i/3])
			color = duRGBA(a,a/4,a/16,255);
		else
			color = duRGBA(a,a,a,255);
			
		dd->vertex(&verts[tris[i+0]*3], color);
		dd->vertex(&verts[tris[i+1]*3], color);
		dd->vertex(&verts[tris[i+2]*3], color);
	}
	dd->end();
}

void duDebugDrawTriMeshSlope(duDebugDraw* dd, const float* verts, int /*nverts*/,
							 const int* tris, const float* normals, int ntris,
							 const float walkableSlopeAngle)
{
	if (!dd) return;
	if (!verts) return;
	if (!tris) return;
	if (!normals) return;
	
	const float walkableThr = cosf(walkableSlopeAngle/180.0f*DU_PI);

	dd->begin(DU_DRAW_TRIS);
	for (int i = 0; i < ntris*3; i += 3)
	{
		const float* norm = &normals[i];
		unsigned int color;
		unsigned char a = (unsigned char)(255*(2+normals[i+0]+normals[i+1])/4);
		if (norm[1] < walkableThr)
			color = duRGBA(a,a/4,a/16,255);
		else
			color = duRGBA(a,a,a,255);
		
		dd->vertex(&verts[tris[i+0]*3], color);
		dd->vertex(&verts[tris[i+1]*3], color);
		dd->vertex(&verts[tris[i+2]*3], color);
	}
	dd->end();
}

void duDebugDrawHeightfieldSolid(duDebugDraw* dd, const rcHeightfield& hf)
{
	if (!dd) return;

	const float* orig = hf.bmin;
	const float cs = hf.cs;
	const float ch = hf.ch;
	
	const int w = hf.width;
	const int h = hf.height;
		
	unsigned int fcol[6];
	duCalcBoxColors(fcol, duRGBA(255,255,255,255), duRGBA(255,255,255,255));
	
	dd->begin(DU_DRAW_QUADS);
	
	for (int y = 0; y < h; ++y)
	{
		for (int x = 0; x < w; ++x)
		{
			float fx = orig[0] + x*cs;
			float fz = orig[2] + y*cs;
			const rcSpan* s = hf.spans[x + y*w];
			while (s)
			{
				duAppendBox(dd, fx, orig[1]+s->smin*ch, fz, fx+cs, orig[1] + s->smax*ch, fz+cs, fcol);
				s = s->next;
			}
		}
	}
	dd->end();
}

void duDebugDrawHeightfieldWalkable(duDebugDraw* dd, const rcHeightfield& hf)
{
	if (!dd) return;

	const float* orig = hf.bmin;
	const float cs = hf.cs;
	const float ch = hf.ch;
	
	const int w = hf.width;
	const int h = hf.height;
	
	unsigned int fcol[6];
	duCalcBoxColors(fcol, duRGBA(255,255,255,255), duRGBA(217,217,217,255));

	dd->begin(DU_DRAW_QUADS);
	
	for (int y = 0; y < h; ++y)
	{
		for (int x = 0; x < w; ++x)
		{
			float fx = orig[0] + x*cs;
			float fz = orig[2] + y*cs;
			const rcSpan* s = hf.spans[x + y*w];
			while (s)
			{
				if (s->area == RC_WALKABLE_AREA)
					fcol[0] = duRGBA(64,128,160,255);
				else if (s->area == RC_NULL_AREA)
					fcol[0] = duRGBA(64,64,64,255);
				else
					fcol[0] = duMultCol(duIntToCol(s->area, 255), 200);
				
				duAppendBox(dd, fx, orig[1]+s->smin*ch, fz, fx+cs, orig[1] + s->smax*ch, fz+cs, fcol);
				s = s->next;
			}
		}
	}
	
	dd->end();
}

void duDebugDrawCompactHeightfieldSolid(duDebugDraw* dd, const rcCompactHeightfield& chf)
{
	if (!dd) return;

	const float cs = chf.cs;
	const float ch = chf.ch;

	dd->begin(DU_DRAW_QUADS);
	
	for (int y = 0; y < chf.height; ++y)
	{
		for (int x = 0; x < chf.width; ++x)
		{
			const float fx = chf.bmin[0] + x*cs;
			const float fz = chf.bmin[2] + y*cs;
			const rcCompactCell& c = chf.cells[x+y*chf.width];

			for (unsigned i = c.index, ni = c.index+c.count; i < ni; ++i)
			{
				const rcCompactSpan& s = chf.spans[i];

				unsigned int color;
				if (chf.areas[i] == RC_WALKABLE_AREA)
					color = duRGBA(0,192,255,64);
				else if (chf.areas[i] == RC_NULL_AREA)
					color = duRGBA(0,0,0,64);
				else
					color = duIntToCol(chf.areas[i], 255);
				
				const float fy = chf.bmin[1] + (s.y+1)*ch;
				dd->vertex(fx, fy, fz, color);
				dd->vertex(fx, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz, color);
			}
		}
	}
	dd->end();
}

void duDebugDrawCompactHeightfieldRegions(duDebugDraw* dd, const rcCompactHeightfield& chf)
{
	if (!dd) return;

	const float cs = chf.cs;
	const float ch = chf.ch;

	dd->begin(DU_DRAW_QUADS);

	for (int y = 0; y < chf.height; ++y)
	{
		for (int x = 0; x < chf.width; ++x)
		{
			const float fx = chf.bmin[0] + x*cs;
			const float fz = chf.bmin[2] + y*cs;
			const rcCompactCell& c = chf.cells[x+y*chf.width];
			
			for (unsigned i = c.index, ni = c.index+c.count; i < ni; ++i)
			{
				const rcCompactSpan& s = chf.spans[i];
				const float fy = chf.bmin[1] + (s.y)*ch;
				unsigned int color;
				if (s.reg)
					color = duIntToCol(s.reg, 192);
				else
					color = duRGBA(0,0,0,64);

				dd->vertex(fx, fy, fz, color);
				dd->vertex(fx, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz, color);
			}
		}
	}
	
	dd->end();
}


void duDebugDrawCompactHeightfieldDistance(duDebugDraw* dd, const rcCompactHeightfield& chf)
{
	if (!dd) return;
	if (!chf.dist) return;
		
	const float cs = chf.cs;
	const float ch = chf.ch;
			
	float maxd = chf.maxDistance;
	if (maxd < 1.0f) maxd = 1;
	const float dscale = 255.0f / maxd;
	
	dd->begin(DU_DRAW_QUADS);
	
	for (int y = 0; y < chf.height; ++y)
	{
		for (int x = 0; x < chf.width; ++x)
		{
			const float fx = chf.bmin[0] + x*cs;
			const float fz = chf.bmin[2] + y*cs;
			const rcCompactCell& c = chf.cells[x+y*chf.width];
			
			for (unsigned i = c.index, ni = c.index+c.count; i < ni; ++i)
			{
				const rcCompactSpan& s = chf.spans[i];
				const float fy = chf.bmin[1] + (s.y+1)*ch;
				const unsigned char cd = (unsigned char)(chf.dist[i] * dscale);
				const unsigned int color = duRGBA(cd,cd,cd,255);
				dd->vertex(fx, fy, fz, color);
				dd->vertex(fx, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz, color);
			}
		}
	}
	dd->end();
}

void duDebugDrawLeanHeightfieldSolid(duDebugDraw* dd, const rcLeanHeightfield& lhf)
{
	if (!dd) return;
	
	const float cs = lhf.cs;
	const float ch = lhf.ch;
	
	const int headerSize = rcAlign4(sizeof(rcLeanHeightfield));
	const int countsSize = rcAlign4(sizeof(unsigned char)*lhf.width*lhf.height);
	const int floorsSize = rcAlign4(sizeof(unsigned short)*lhf.spanCount);
	const unsigned char* data = (const unsigned char*)&lhf;
	const unsigned char* counts = (const unsigned char*)&data[headerSize];
	const unsigned short* floors = (const unsigned short*)&data[headerSize+countsSize];
	const unsigned char* areas = (const unsigned char*)&data[headerSize+countsSize+floorsSize];
	
	
	dd->begin(DU_DRAW_QUADS);
	
	unsigned short mask = (1<<RC_SPAN_HEIGHT_BITS)-1;
	
	int idx = 0;
	
	for (int y = 0; y < lhf.height; ++y)
	{
		for (int x = 0; x < lhf.width; ++x)
		{
			const float fx = lhf.bmin[0] + x*cs;
			const float fz = lhf.bmin[2] + y*cs;
			const int count = counts[x+y*lhf.width];
			
			for (int i = idx, ni = idx+count; i < ni; ++i)
			{
				const int h = floors[i] & mask;
				unsigned char area = areas[i];
				
				unsigned int color;
				if (area == RC_WALKABLE_AREA)
					color = duRGBA(0,192,255,64);
				else if (area == RC_NULL_AREA)
					color = duRGBA(0,0,0,64);
				else
					color = duIntToCol(area, 255);
				
				const float fy = lhf.bmin[1] + (h+1)*ch;
				dd->vertex(fx, fy, fz, color);
				dd->vertex(fx, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz+cs, color);
				dd->vertex(fx+cs, fy, fz, color);
			}
			idx += count;
		}
	}
	dd->end();
}

void duDebugDrawHeightfieldLayers(duDebugDraw* dd, const struct rcHeightfieldLayerSet& lset)
{
	if (!dd) return;
	
	const float cs = lset.cs;
	const float ch = lset.ch;
	const int w = lset.width;
	const int h = lset.height;
	
	for (int i = 0; i < lset.nlayers; ++i)
	{
		const rcHeightfieldLayer* layer = &lset.layers[i];
		
		unsigned int color = duIntToCol(i+1, 255);

		// Layer bounds
		float bmin[3], bmax[3];
		rcVcopy(bmin, lset.bmin);
		rcVcopy(bmax, lset.bmax);
		bmin[1] = lset.bmin[1] + (layer->ymin-1)*ch;
		bmax[1] = lset.bmin[1] + (layer->ymax+1)*ch;
		duDebugDrawBoxWire(dd, bmin[0],bmin[1],bmin[2], bmax[0],bmax[1],bmax[2], duTransCol(color,128), 2.0f);

		// Layer height
		dd->begin(DU_DRAW_QUADS);
		for (int y = 0; y < h; ++y)
		{
			for (int x = 0; x < w; ++x)
			{
				const int idx = x+y*w;
				const int h = (int)layer->heights[idx];
				if (h == 0xffff) continue;
				const unsigned char area = layer->areas[idx];
				
				unsigned int col;
				if (area == RC_WALKABLE_AREA)
					col = duLerpCol(color, duRGBA(0,192,255,64), 32);
				else if (area == RC_NULL_AREA)
					col = duLerpCol(color, duRGBA(0,0,0,64), 32);
				else
					col = duLerpCol(color, duIntToCol(area, 255), 32);
				
				const float fx = lset.bmin[0] + x*cs;
				const float fy = lset.bmin[1] + (h+1)*ch;
				const float fz = lset.bmin[2] + y*cs;
				
				dd->vertex(fx, fy, fz, col);
				dd->vertex(fx, fy, fz+cs, col);
				dd->vertex(fx+cs, fy, fz+cs, col);
				dd->vertex(fx+cs, fy, fz, col);
			}
		}
		dd->end();
		
		// Portals
		unsigned int pcol = duLerpCol(color,duRGBA(255,255,255,255),128);
		dd->begin(DU_DRAW_LINES, 2.0f);
		for (int j = 0; j < layer->nportals; ++j)
		{
			const rcHeightfieldLayerPortal* portal = &layer->portals[j];
			if (portal->dir == 0 || portal->dir == 2)
			{
				const int ha = (int)layer->heights[portal->pos + portal->smin*w];
				const int hb = (int)layer->heights[portal->pos + (portal->smax-1)*w];
				const int xx = (portal->dir == 0) ? portal->pos : portal->pos+1;
				const float fx = lset.bmin[0] + xx*cs;
				const float fya = lset.bmin[1] + (ha+4)*ch;
				const float fyb = lset.bmin[1] + (hb+4)*ch;
				const float fza = lset.bmin[2] + portal->smin*cs;
				const float fzb = lset.bmin[2] + portal->smax*cs;
				dd->vertex(fx, fya, fza, pcol);
				dd->vertex(fx, fyb, fzb, pcol);
			}
			else if (portal->dir == 3 || portal->dir == 1)
			{
				const int ha = (int)layer->heights[portal->smin + portal->pos*w];
				const int hb = (int)layer->heights[(portal->smax-1) + portal->pos*w];
				const int yy = (portal->dir == 3) ? portal->pos : portal->pos+1;
				const float fxa = lset.bmin[0] + portal->smin*cs;
				const float fxb = lset.bmin[0] + portal->smax*cs;
				const float fya = lset.bmin[1] + (ha+3)*ch;
				const float fyb = lset.bmin[1] + (hb+3)*ch;
				const float fz = lset.bmin[2] + yy*cs;
				dd->vertex(fxa, fya, fz, pcol);
				dd->vertex(fxb, fyb, fz, pcol);
			}
		}
		dd->end();
	}

}

static void getContourCenter(const rcContour* cont, const float* orig, float cs, float ch, float* center)
{
	center[0] = 0;
	center[1] = 0;
	center[2] = 0;
	if (!cont->nverts)
		return;
	for (int i = 0; i < cont->nverts; ++i)
	{
		const int* v = &cont->verts[i*4];
		center[0] += (float)v[0];
		center[1] += (float)v[1];
		center[2] += (float)v[2];
	}
	const float s = 1.0f / cont->nverts;
	center[0] *= s * cs;
	center[1] *= s * ch;
	center[2] *= s * cs;
	center[0] += orig[0];
	center[1] += orig[1] + 4*ch;
	center[2] += orig[2];
}

static const rcContour* findContourFromSet(const rcContourSet& cset, unsigned short reg)
{
	for (int i = 0; i < cset.nconts; ++i)
	{
		if (cset.conts[i].reg == reg)
			return &cset.conts[i];
	}
	return 0;
}

void duDebugDrawRegionConnections(duDebugDraw* dd, const rcContourSet& cset, const float alpha)
{
	if (!dd) return;
	
	const float* orig = cset.bmin;
	const float cs = cset.cs;
	const float ch = cset.ch;
	
	// Draw centers
	float pos[3], pos2[3];

	unsigned int color = duRGBA(0,0,0,196);

	dd->begin(DU_DRAW_LINES, 2.0f);

	for (int i = 0; i < cset.nconts; ++i)
	{
		const rcContour* cont = &cset.conts[i];
		getContourCenter(cont, orig, cs, ch, pos);
		for (int j = 0; j < cont->nverts; ++j)
		{
			const int* v = &cont->verts[j*4];
			if (v[3] == 0 || (unsigned short)v[3] < cont->reg) continue;
			const rcContour* cont2 = findContourFromSet(cset, (unsigned short)v[3]);
			if (cont2)
			{
				getContourCenter(cont2, orig, cs, ch, pos2);
				duAppendArc(dd, pos[0],pos[1],pos[2], pos2[0],pos2[1],pos2[2], 0.25f, 0.6f, 0.6f, color);
			}
		}
	}
	
	dd->end();

	unsigned char a = (unsigned char)(alpha * 255.0f);

	dd->begin(DU_DRAW_POINTS, 7.0f);

	for (int i = 0; i < cset.nconts; ++i)
	{
		const rcContour* cont = &cset.conts[i];
		unsigned int color = duDarkenCol(duIntToCol(cont->reg,a));
		getContourCenter(cont, orig, cs, ch, pos);
		dd->vertex(pos, color);
	}
	dd->end();
}

void duDebugDrawRawContours(duDebugDraw* dd, const rcContourSet& cset, const float alpha)
{
	if (!dd) return;

	const float* orig = cset.bmin;
	const float cs = cset.cs;
	const float ch = cset.ch;
	
	const unsigned char a = (unsigned char)(alpha*255.0f);
	
	dd->begin(DU_DRAW_LINES, 2.0f);
			
	for (int i = 0; i < cset.nconts; ++i)
	{
		const rcContour& c = cset.conts[i];
		unsigned int color = duIntToCol(c.reg, a);

		for (int j = 0; j < c.nrverts; ++j)
		{
			const int* v = &c.rverts[j*4];
			float fx = orig[0] + v[0]*cs;
			float fy = orig[1] + (v[1]+1+(i&1))*ch;
			float fz = orig[2] + v[2]*cs;
			dd->vertex(fx,fy,fz,color);
			if (j > 0)
				dd->vertex(fx,fy,fz,color);
		}
		// Loop last segment.
		const int* v = &c.rverts[0];
		float fx = orig[0] + v[0]*cs;
		float fy = orig[1] + (v[1]+1+(i&1))*ch;
		float fz = orig[2] + v[2]*cs;
		dd->vertex(fx,fy,fz,color);
	}
	dd->end();

	dd->begin(DU_DRAW_POINTS, 2.0f);	

	for (int i = 0; i < cset.nconts; ++i)
	{
		const rcContour& c = cset.conts[i];
		unsigned int color = duDarkenCol(duIntToCol(c.reg, a));
		
		for (int j = 0; j < c.nrverts; ++j)
		{
			const int* v = &c.rverts[j*4];
			float off = 0;
			unsigned int colv = color;
			if (v[3] & RC_BORDER_VERTEX)
			{
				colv = duRGBA(255,255,255,a);
				off = ch*2;
			}
			
			float fx = orig[0] + v[0]*cs;
			float fy = orig[1] + (v[1]+1+(i&1))*ch + off;
			float fz = orig[2] + v[2]*cs;
			dd->vertex(fx,fy,fz, colv);
		}
	}
	dd->end();
}

void duDebugDrawContours(duDebugDraw* dd, const rcContourSet& cset, const float alpha)
{
	if (!dd) return;

	const float* orig = cset.bmin;
	const float cs = cset.cs;
	const float ch = cset.ch;
	
	const unsigned char a = (unsigned char)(alpha*255.0f);
	
	dd->begin(DU_DRAW_LINES, 2.5f);
	
	for (int i = 0; i < cset.nconts; ++i)
	{
		const rcContour& c = cset.conts[i];
		if (!c.nverts)
			continue;
		unsigned int color = duIntToCol(c.reg, a);

		for (int j = 0; j < c.nverts; ++j)
		{
			const int* v = &c.verts[j*4];
			float fx = orig[0] + v[0]*cs;
			float fy = orig[1] + (v[1]+1+(i&1))*ch;
			float fz = orig[2] + v[2]*cs;
			dd->vertex(fx,fy,fz, color);
			if (j > 0)
				dd->vertex(fx,fy,fz, color);
		}
		// Loop last segment
		const int* v = &c.verts[0];
		float fx = orig[0] + v[0]*cs;
		float fy = orig[1] + (v[1]+1+(i&1))*ch;
		float fz = orig[2] + v[2]*cs;
		dd->vertex(fx,fy,fz, color);
	}
	dd->end();

	dd->begin(DU_DRAW_POINTS, 3.0f);
	
	for (int i = 0; i < cset.nconts; ++i)
	{
		const rcContour& c = cset.conts[i];
		unsigned int color = duDarkenCol(duIntToCol(c.reg, a));
		for (int j = 0; j < c.nverts; ++j)
		{
			const int* v = &c.verts[j*4];
			float off = 0;
			unsigned int colv = color;
			if (v[3] & RC_BORDER_VERTEX)
			{
				colv = duRGBA(255,255,255,a);
				off = ch*2;
			}

			float fx = orig[0] + v[0]*cs;
			float fy = orig[1] + (v[1]+1+(i&1))*ch + off;
			float fz = orig[2] + v[2]*cs;
			dd->vertex(fx,fy,fz, colv);
		}
	}
	dd->end();
}

void duDebugDrawPolyMesh(duDebugDraw* dd, const struct rcPolyMesh& mesh)
{
	if (!dd) return;

	const int nvp = mesh.nvp;
	const float cs = mesh.cs;
	const float ch = mesh.ch;
	const float* orig = mesh.bmin;
	
	dd->begin(DU_DRAW_TRIS);
	
	for (int i = 0; i < mesh.npolys; ++i)
	{
		const unsigned short* p = &mesh.polys[i*nvp*2];
		
		unsigned int color;
		if (mesh.areas[i] == RC_WALKABLE_AREA)
			color = duRGBA(0,192,255,64);
		else if (mesh.areas[i] == RC_NULL_AREA)
			color = duRGBA(0,0,0,64);
		else
			color = duIntToCol(mesh.areas[i], 255);
		
		unsigned short vi[3];
		for (int j = 2; j < nvp; ++j)
		{
			if (p[j] == RC_MESH_NULL_IDX) break;
			vi[0] = p[0];
			vi[1] = p[j-1];
			vi[2] = p[j];
			for (int k = 0; k < 3; ++k)
			{
				const unsigned short* v = &mesh.verts[vi[k]*3];
				const float x = orig[0] + v[0]*cs;
				const float y = orig[1] + (v[1]+1)*ch;
				const float z = orig[2] + v[2]*cs;
				dd->vertex(x,y,z, color);
			}
		}
	}
	dd->end();

	// Draw neighbours edges
	const unsigned int coln = duRGBA(0,48,64,32);
	dd->begin(DU_DRAW_LINES, 1.5f);
	for (int i = 0; i < mesh.npolys; ++i)
	{
		const unsigned short* p = &mesh.polys[i*nvp*2];
		for (int j = 0; j < nvp; ++j)
		{
			if (p[j] == RC_MESH_NULL_IDX) break;
			if (p[nvp+j] == RC_MESH_NULL_IDX) continue;
			int vi[2];
			vi[0] = p[j];
			if (j+1 >= nvp || p[j+1] == RC_MESH_NULL_IDX)
				vi[1] = p[0];
			else
				vi[1] = p[j+1];
			for (int k = 0; k < 2; ++k)
			{
				const unsigned short* v = &mesh.verts[vi[k]*3];
				const float x = orig[0] + v[0]*cs;
				const float y = orig[1] + (v[1]+1)*ch + 0.1f;
				const float z = orig[2] + v[2]*cs;
				dd->vertex(x, y, z, coln);
			}
		}
	}
	dd->end();
	
	// Draw boundary edges
	const unsigned int colb = duRGBA(0,48,64,220);
	dd->begin(DU_DRAW_LINES, 2.5f);
	for (int i = 0; i < mesh.npolys; ++i)
	{
		const unsigned short* p = &mesh.polys[i*nvp*2];
		for (int j = 0; j < nvp; ++j)
		{
			if (p[j] == RC_MESH_NULL_IDX) break;
			if (p[nvp+j] != RC_MESH_NULL_IDX) continue;
			int vi[2];
			vi[0] = p[j];
			if (j+1 >= nvp || p[j+1] == RC_MESH_NULL_IDX)
				vi[1] = p[0];
			else
				vi[1] = p[j+1];
			for (int k = 0; k < 2; ++k)
			{
				const unsigned short* v = &mesh.verts[vi[k]*3];
				const float x = orig[0] + v[0]*cs;
				const float y = orig[1] + (v[1]+1)*ch + 0.1f;
				const float z = orig[2] + v[2]*cs;
				dd->vertex(x, y, z, colb);
			}
		}
	}
	dd->end();
	
	dd->begin(DU_DRAW_POINTS, 3.0f);
	const unsigned int colv = duRGBA(0,0,0,220);
	for (int i = 0; i < mesh.nverts; ++i)
	{
		const unsigned short* v = &mesh.verts[i*3];
		const float x = orig[0] + v[0]*cs;
		const float y = orig[1] + (v[1]+1)*ch + 0.1f;
		const float z = orig[2] + v[2]*cs;
		dd->vertex(x,y,z, colv);
	}
	dd->end();
}

void duDebugDrawPolyMeshDetail(duDebugDraw* dd, const struct rcPolyMeshDetail& dmesh)
{
	if (!dd) return;

	dd->begin(DU_DRAW_TRIS);
	
	for (int i = 0; i < dmesh.nmeshes; ++i)
	{
		const unsigned int* m = &dmesh.meshes[i*4];
		const unsigned int bverts = m[0];
		const unsigned int btris = m[2];
		const int ntris = (int)m[3];
		const float* verts = &dmesh.verts[bverts*3];
		const unsigned char* tris = &dmesh.tris[btris*4];

		unsigned int color = duIntToCol(i, 192);

		for (int j = 0; j < ntris; ++j)
		{
			dd->vertex(&verts[tris[j*4+0]*3], color);
			dd->vertex(&verts[tris[j*4+1]*3], color);
			dd->vertex(&verts[tris[j*4+2]*3], color);
		}
	}
	dd->end();

	// Internal edges.
	dd->begin(DU_DRAW_LINES, 1.0f);
	const unsigned int coli = duRGBA(0,0,0,64);
	for (int i = 0; i < dmesh.nmeshes; ++i)
	{
		const unsigned int* m = &dmesh.meshes[i*4];
		const unsigned int bverts = m[0];
		const unsigned int btris = m[2];
		const int ntris = (int)m[3];
		const float* verts = &dmesh.verts[bverts*3];
		const unsigned char* tris = &dmesh.tris[btris*4];
		
		for (int j = 0; j < ntris; ++j)
		{
			const unsigned char* t = &tris[j*4];
			for (int k = 0, kp = 2; k < 3; kp=k++)
			{
				unsigned char ef = (t[3] >> (kp*2)) & 0x3;
				if (ef == 0)
				{
					// Internal edge
					if (t[kp] < t[k])
					{
						dd->vertex(&verts[t[kp]*3], coli);
						dd->vertex(&verts[t[k]*3], coli);
					}
				}
			}
		}
	}
	dd->end();
	
	// External edges.
	dd->begin(DU_DRAW_LINES, 2.0f);
	const unsigned int cole = duRGBA(0,0,0,64);
	for (int i = 0; i < dmesh.nmeshes; ++i)
	{
		const unsigned int* m = &dmesh.meshes[i*4];
		const unsigned int bverts = m[0];
		const unsigned int btris = m[2];
		const int ntris = (int)m[3];
		const float* verts = &dmesh.verts[bverts*3];
		const unsigned char* tris = &dmesh.tris[btris*4];
		
		for (int j = 0; j < ntris; ++j)
		{
			const unsigned char* t = &tris[j*4];
			for (int k = 0, kp = 2; k < 3; kp=k++)
			{
				unsigned char ef = (t[3] >> (kp*2)) & 0x3;
				if (ef != 0)
				{
					// Ext edge
					dd->vertex(&verts[t[kp]*3], cole);
					dd->vertex(&verts[t[k]*3], cole);
				}
			}
		}
	}
	dd->end();
	
	dd->begin(DU_DRAW_POINTS, 3.0f);
	const unsigned int colv = duRGBA(0,0,0,64);
	for (int i = 0; i < dmesh.nmeshes; ++i)
	{
		const unsigned int* m = &dmesh.meshes[i*4];
		const unsigned int bverts = m[0];
		const int nverts = (int)m[1];
		const float* verts = &dmesh.verts[bverts*3];
		for (int j = 0; j < nverts; ++j)
			dd->vertex(&verts[j*3], colv);
	}
	dd->end();
}