Add the GPU rigid body pipeline from https://github.com/erwincoumans/experiments as a Bullet 3.x preview for Bullet 2.80

2012-03-05 00:54:32 +00:00
parent 73c4646b40
commit 571af41cf6
257 changed files with 55106 additions and 0 deletions
--- a/Extras/RigidBodyGpuPipeline/dynamics/basic_demo/CubeMapUtils.h
+++ b/Extras/RigidBodyGpuPipeline/dynamics/basic_demo/CubeMapUtils.h
@@ -0,0 +1,111 @@
+/*
+Copyright (c) 2012 Advanced Micro Devices, Inc.  
+
+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.
+*/
+//Originally written by Takahiro Harada
+
+
+#pragma once
+
+//	Coords are 0.5f shifted. See CubeMapDemo.cpp for usage. 
+class CubeMapUtils
+{
+	public:
+		//enum Face
+		//{
+		//	FACE_XM,
+		//	FACE_XP,
+		//	FACE_YM,
+		//	FACE_YP,
+		//	FACE_ZM,
+		//	FACE_ZP,
+		//	NUM_FACES,
+		//};
+
+		__inline
+		static void calcCrd(const float4& p, int& faceIdxOut, float& x, float& y);
+
+		__inline
+		static float4 calcVector(int faceIdx, float x, float y);
+};
+
+
+__inline
+void CubeMapUtils::calcCrd(const float4& p, int& faceIdxOut, float& x, float& y)
+{
+	const float4 majorAxes[] = {make_float4(1,0,0,0), make_float4(0,1,0,0), make_float4(0,0,1,0)};
+
+	float4 majorAxis;
+
+	{
+		int idx;
+		float r2[] = {p.x*p.x, p.y*p.y, p.z*p.z};
+
+		idx = (r2[1]>r2[0])? 1:0;
+		idx = (r2[2]>r2[idx])? 2:idx;
+		majorAxis = majorAxes[idx];
+
+		bool isNeg = dot3F4( p, majorAxis ) < 0.f;
+
+		faceIdxOut = (idx*2+((isNeg)? 0:1));
+//==
+		float4 abs = make_float4( fabs(p.x), fabs(p.y), fabs(p.z), 0.f );
+
+		float d;
+		if( idx == 0 )
+		{
+			x = p.y;
+			y = p.z;
+			d = abs.x;
+		}
+		else if( idx == 1 )
+		{
+			x = p.z;
+			y = p.x;
+			d = abs.y;
+		}
+		else
+		{
+			x = p.x;
+			y = p.y;
+			d = abs.z;
+		}
+
+		float dInv = (d==0.f)? 0.f: (1.f/d);
+		x = (x*dInv+1.f)*0.5f;
+		y = (y*dInv+1.f)*0.5f;
+	}
+}
+
+__inline
+float4 CubeMapUtils::calcVector(int faceIdx, float x, float y)
+{
+	int dir = faceIdx/2;
+	float z = (faceIdx%2 == 0)? -1.f:1.f;
+
+	x = x*2.f-1.f;
+	y = y*2.f-1.f;
+	
+	if( dir == 0 )
+	{
+		return make_float4(z, x, y);
+	}
+	else if( dir == 1 )
+	{
+		return make_float4(y,z,x);
+	}
+	else
+	{
+		return make_float4(x,y,z);
+	}
+}
+