Add example for projective texture.

data/cube.mtl

@@ -10,7 +10,7 @@ newmtl cube
   Ks 0.0000 0.0000 0.0000
   Ke 0.0000 0.0000 0.0000
   map_Ka cube.tga
-  map_Kd cube.png
+  map_Kd checker_blue.png
   
   
 

examples/CommonInterfaces/CommonRenderInterface.h

@@ -16,6 +16,7 @@ enum
 	B3_CREATE_SHADOWMAP_RENDERMODE,
 	B3_USE_SHADOWMAP_RENDERMODE,
 	B3_USE_SHADOWMAP_RENDERMODE_REFLECTION,
+	B3_USE_PROJECTIVE_TEXTURE_RENDERMODE,
 };
 
 

examples/OpenGLWindow/GLInstancingRenderer.cpp

@@ -16,7 +16,9 @@ subject to the following restrictions:
 
 
 ///todo: make this configurable in the gui
-bool useShadowMap = true;// true;//false;//true;
+bool useShadowMap = false;// true;//false;//true;
+float projectiveTextureViewSize = 10;
+bool useProjectiveTexture = true;
 int shadowMapWidth= 4096;
 int shadowMapHeight= 4096;
 float shadowMapWorldSize=10;
@@ -225,6 +227,9 @@ struct InternalDataRenderer : public GLInstanceRendererInternalData
 	b3Vector3 m_lightPos;
 	b3Vector3 m_lightSpecularIntensity;
 	
+	b3Vector3 m_projectorPos;
+	b3Vector3 m_projectorDir;
+
 	GLuint				m_defaultTexturehandle;
 	b3AlignedObjectArray<InternalTextureHandle>	m_textureHandles;
 
@@ -1530,7 +1535,13 @@ void GLInstancingRenderer::renderScene()
 		//renderSceneInternal(B3_USE_SHADOWMAP_RENDERMODE_REFLECTION);
 		renderSceneInternal(B3_USE_SHADOWMAP_RENDERMODE);
 
-	} else
+	}
+	else if (useProjectiveTexture)
+	{
+		renderSceneInternal(B3_CREATE_SHADOWMAP_RENDERMODE);
+		renderSceneInternal(B3_USE_PROJECTIVE_TEXTURE_RENDERMODE);
+	}
+	else
 	{
 		renderSceneInternal();
 	}
@@ -1976,6 +1987,11 @@ void GLInstancingRenderer::renderSceneInternal(int orgRenderMode)
 		renderMode = B3_DEFAULT_RENDERMODE;
 	}
 	
+	if (orgRenderMode==B3_USE_PROJECTIVE_TEXTURE_RENDERMODE)
+	{
+		renderMode = B3_USE_PROJECTIVE_TEXTURE_RENDERMODE;
+	}
+
 //	glEnable(GL_DEPTH_TEST);
 
 	GLint dims[4];
@@ -2004,6 +2020,10 @@ void GLInstancingRenderer::renderSceneInternal(int orgRenderMode)
 	GLfloat depthModelViewMatrix[4][4];
 	//GLfloat depthModelViewMatrix2[4][4];
 	
+	// For projective texture mapping
+	float textureProjectionMatrix[4][4];
+	GLfloat textureModelViewMatrix[4][4];
+
 	// Compute the MVP matrix from the light's point of view
 	if (renderMode==B3_CREATE_SHADOWMAP_RENDERMODE)
 	{
@@ -2113,6 +2133,18 @@ void GLInstancingRenderer::renderSceneInternal(int orgRenderMode)
 	GLfloat depthBiasMVP[4][4];
 	b3Matrix4x4Mul(biasMatrix,depthMVP,depthBiasMVP);
 
+	// Compute projection matrix for texture projector
+	float textureViewMatrix[4][4];
+	b3Vector3 projectorDir = m_data->m_projectorDir.normalize();
+	float projectorDist = 3.0;
+	b3Vector3 projectorUp = b3MakeVector3(0,0,1.0);
+	b3CreateLookAt(m_data->m_projectorPos, m_data->m_projectorDir*projectorDist, projectorUp, &textureViewMatrix[0][0]);
+	GLfloat textureModelMatrix[4][4];
+	b3CreateDiagonalMatrix(1.f, textureModelMatrix);
+	b3Matrix4x4Mul(textureViewMatrix, textureModelMatrix, textureModelViewMatrix);
+	b3CreateOrtho(-projectiveTextureViewSize,projectiveTextureViewSize,-projectiveTextureViewSize,projectiveTextureViewSize,1,300,textureProjectionMatrix);
+	GLfloat textureMVP[4][4];
+	b3Matrix4x4Mul(textureProjectionMatrix, textureModelViewMatrix, textureMVP);
 
 	//float m_frustumZNear=0.1;
     //float m_frustumZFar=100.f;
@@ -2459,6 +2491,75 @@ b3Assert(glGetError() ==GL_NO_ERROR);
 								glActiveTexture(GL_TEXTURE1);
 								glBindTexture(GL_TEXTURE_2D,0);
 
+								glActiveTexture(GL_TEXTURE0);
+								glBindTexture(GL_TEXTURE_2D,0);
+								break;
+							}
+							case B3_USE_PROJECTIVE_TEXTURE_RENDERMODE:
+							{
+								if ( gfxObj->m_flags&eGfxTransparency)
+								{
+									glDepthMask(false);
+									glEnable (GL_BLEND);
+									glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+								}
+								
+								glUseProgram(useShadowMapInstancingShader);
+								glUniformMatrix4fv(useShadow_ProjectionMatrix, 1, false, &m_data->m_projectionMatrix[0]);
+								glUniform3f(useShadow_lightSpecularIntensity, m_data->m_lightSpecularIntensity[0],m_data->m_lightSpecularIntensity[1],m_data->m_lightSpecularIntensity[2]);
+								glUniform3f(useShadow_materialSpecularColor, gfxObj->m_materialSpecularColor[0],gfxObj->m_materialSpecularColor[1],gfxObj->m_materialSpecularColor[2]);
+								
+								float MVP[16];
+								if (reflectionPass)
+								{
+									float tmp[16];
+									float reflectionMatrix[16] = {1,0,0,0,
+										0,1,0,0,
+										0,0,-1,0,
+										0,0,0,1};
+									glCullFace(GL_FRONT);
+									b3Matrix4x4Mul16(m_data->m_viewMatrix,reflectionMatrix,tmp);
+									b3Matrix4x4Mul16(m_data->m_projectionMatrix,tmp,MVP);
+								} else
+								{
+									b3Matrix4x4Mul16(m_data->m_projectionMatrix,m_data->m_viewMatrix,MVP);
+									glCullFace(GL_BACK);
+								}
+								
+								glUniformMatrix4fv(useShadow_MVP, 1, false, &MVP[0]);
+								glUniform3f(useShadow_lightPosIn,m_data->m_lightPos[0],m_data->m_lightPos[1],m_data->m_lightPos[2]);
+								float camPos[3];
+								m_data->m_activeCamera->getCameraPosition(camPos);
+								glUniform3f(useShadow_cameraPositionIn,camPos[0],camPos[1],camPos[2]);
+								glUniform1f(useShadow_materialShininessIn,gfxObj->m_materialShinyNess);
+								
+								glUniformMatrix4fv(useShadow_DepthBiasModelViewMatrix, 1, false, &textureMVP[0][0]);
+								glActiveTexture(GL_TEXTURE1);
+								glBindTexture(GL_TEXTURE_2D, m_data->m_shadowTexture);
+								glUniform1i(useShadow_shadowMap,1);
+								
+								//sort transparent objects
+								if ( gfxObj->m_flags&eGfxTransparency)
+								{
+									int instanceId = transparentInstances[i].m_instanceId;
+									glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, 0, (GLvoid *)((instanceId)*4*sizeof(float)+m_data->m_maxShapeCapacityInBytes));
+									glVertexAttribPointer(2, 4, GL_FLOAT, GL_FALSE, 0, (GLvoid *)((instanceId)*4*sizeof(float)+m_data->m_maxShapeCapacityInBytes+POSITION_BUFFER_SIZE));
+									glVertexAttribPointer(5, 4, GL_FLOAT, GL_FALSE, 0, (GLvoid *)((instanceId)*4*sizeof(float)+m_data->m_maxShapeCapacityInBytes+POSITION_BUFFER_SIZE+ORIENTATION_BUFFER_SIZE));
+									glVertexAttribPointer(6, 3, GL_FLOAT, GL_FALSE, 0, (GLvoid *)((instanceId)*3*sizeof(float)+m_data->m_maxShapeCapacityInBytes+POSITION_BUFFER_SIZE+ORIENTATION_BUFFER_SIZE+COLOR_BUFFER_SIZE));
+									glDrawElements(GL_TRIANGLES, indexCount, GL_UNSIGNED_INT, 0);
+								} else
+								{
+									glDrawElementsInstanced(GL_TRIANGLES, indexCount, GL_UNSIGNED_INT, indexOffset, gfxObj->m_numGraphicsInstances);
+								}
+								
+								if ( gfxObj->m_flags&eGfxTransparency)
+								{
+									glDisable (GL_BLEND);
+									glDepthMask(true);
+								}
+								glActiveTexture(GL_TEXTURE1);
+								glBindTexture(GL_TEXTURE_2D,0);
+								
 								glActiveTexture(GL_TEXTURE0);
 								glBindTexture(GL_TEXTURE_2D,0);
 								break;

examples/OpenGLWindow/Shaders/useShadowMapInstancingPS.glsl

@@ -12,11 +12,9 @@ in Vert
 } vert;
 
 uniform sampler2D Diffuse;
-uniform sampler2DShadow shadowMap;
 uniform mat4 ViewMatrixInverse;
 
 in vec3 lightPos,cameraPosition, normal,ambient;
-in vec4 ShadowCoord;
 in vec4 vertexPos;
 in float materialShininess;
 in vec3 lightSpecularIntensity;
@@ -28,7 +26,7 @@ out vec4 color;
 
 void main(void)
 {
-	vec4 texel = fragment.color*texture(Diffuse,vert.texcoord);
+	vec4 texel = fragment.color*texture(Diffuse,vert.texcoord.xy);
 	vec3 ct,cf;
 	float intensity,at,af;
 	if (fragment.color.w==0)
@@ -65,9 +63,7 @@ void main(void)
 	}
     
 
-	float visibility = texture(shadowMap, vec3(ShadowCoord.xy,(ShadowCoord.z)/ShadowCoord.w));
+	float visibility = 1.0;
-	if (intensity<0.5)
-		visibility = 0;
 
 	intensity = 0.7*intensity  + 0.3*intensity*visibility;
 	

examples/OpenGLWindow/Shaders/useShadowMapInstancingPS.h

@@ -11,10 +11,8 @@ static const char* useShadowMapInstancingFragmentShader= \
 "	vec2 texcoord;\n"
 "} vert;\n"
 "uniform sampler2D Diffuse;\n"
-"uniform sampler2DShadow shadowMap;\n"
 "uniform mat4 ViewMatrixInverse;\n"
 "in vec3 lightPos,cameraPosition, normal,ambient;\n"
-"in vec4 ShadowCoord;\n"
 "in vec4 vertexPos;\n"
 "in float materialShininess;\n"
 "in vec3 lightSpecularIntensity;\n"
@@ -22,7 +20,7 @@ static const char* useShadowMapInstancingFragmentShader= \
 "out vec4 color;\n"
 "void main(void)\n"
 "{\n"
-"	vec4 texel = fragment.color*texture(Diffuse,vert.texcoord);\n"
+"	vec4 texel = fragment.color*texture(Diffuse,vert.texcoord.xy);\n"
 "	vec3 ct,cf;\n"
 "	float intensity,at,af;\n"
 "	if (fragment.color.w==0)\n"
@@ -58,9 +56,7 @@ static const char* useShadowMapInstancingFragmentShader= \
 "  \n"
 "	}\n"
 "    \n"
-"	float visibility = texture(shadowMap, vec3(ShadowCoord.xy,(ShadowCoord.z)/ShadowCoord.w));\n"
+"	float visibility = 1.0;\n"
-"	if (intensity<0.5)\n"
-"		visibility = 0;\n"
 "	intensity = 0.7*intensity  + 0.3*intensity*visibility;\n"
 "	\n"
 "	cf = intensity*(vec3(1.0,1.0,1.0)-ambient)+ambient+specularReflection*visibility;\n"

examples/OpenGLWindow/Shaders/useShadowMapInstancingVS.glsl

@@ -91,9 +91,9 @@ void main(void)
 	
 	vec4 vertexLoc = MVP* vec4((instance_position+localcoord).xyz,1);
 	gl_Position = vertexLoc;
-	ShadowCoord = DepthBiasModelViewProjectionMatrix * vec4((instance_position+localcoord).xyz,1);
 
 	fragment.color = instance_color;
-	vert.texcoord = uvcoords;
+	vec4 projcoords = DepthBiasModelViewProjectionMatrix * vec4((instance_position+localcoord).xyz,1);
+	vert.texcoord = projcoords.xy;
 }
 

examples/OpenGLWindow/Shaders/useShadowMapInstancingVS.h

@@ -79,8 +79,8 @@ static const char* useShadowMapInstancingVertexShader= \
 "	\n"
 "	vec4 vertexLoc = MVP* vec4((instance_position+localcoord).xyz,1);\n"
 "	gl_Position = vertexLoc;\n"
-"	ShadowCoord = DepthBiasModelViewProjectionMatrix * vec4((instance_position+localcoord).xyz,1);\n"
 "	fragment.color = instance_color;\n"
-"	vert.texcoord = uvcoords;\n"
+"	vec4 projcoords = DepthBiasModelViewProjectionMatrix * vec4((instance_position+localcoord).xyz,1);\n"
+"	vert.texcoord = projcoords.xy;\n"
 "}\n"
 ;

examples/pybullet/examples/projective_texture.py

@@ -0,0 +1,49 @@
+import pybullet as p
+from time import sleep
+from PIL import Image
+import matplotlib.pyplot as plt
+import numpy as np
+
+physicsClient = p.connect(p.GUI)
+
+p.setGravity(0,0,-10)
+planeId = p.loadURDF("plane.urdf")
+cubeStartPos = [0,0,1]
+cubeStartOrientation = p.getQuaternionFromEuler([0,0,0])
+boxId = p.loadURDF("cube.urdf",cubeStartPos, cubeStartOrientation)
+cubePos, cubeOrn = p.getBasePositionAndOrientation(boxId)
+textureId = p.loadTexture("kcam_vga_scaled_direct.png")
+p.changeVisualShape(objectUniqueId=0, linkIndex=-1, textureUniqueId=textureId)
+p.changeVisualShape(objectUniqueId=1, linkIndex=-1, textureUniqueId=textureId)
+
+#p.resetDebugVisualizerCamera(cameraDistance=3, cameraYaw=30, cameraPitch=52, cameraTargetPosition=[10,0,0])
+fov = 70
+pixelWidth = 640
+pixelHeight = 512
+aspect = pixelWidth / pixelHeight;
+nearPlane = 0.01
+farPlane = 100
+projectionMatrix = p.computeProjectionMatrixFOV(fov, aspect, nearPlane, farPlane);
+viewMatrixLeft = p.computeViewMatrix(cameraEyePosition=[0.045, 3.0, 3.0], cameraTargetPosition=[0.045,0,0], cameraUpVector=[0,0,1.0])
+viewMatrixRight = p.computeViewMatrix(cameraEyePosition=[-0.045, 3.0, 3.0], cameraTargetPosition=[-0.045,0,0], cameraUpVector=[0,0,1.0])
+leftImage = p.getCameraImage(width=640,height=512,viewMatrix=viewMatrixLeft,projectionMatrix=projectionMatrix,renderer=p.ER_BULLET_HARDWARE_OPENGL)
+rightImage = p.getCameraImage(width=640,height=512,viewMatrix=viewMatrixRight,projectionMatrix=projectionMatrix,renderer=p.ER_BULLET_HARDWARE_OPENGL)
+
+left_img = np.reshape(np.asarray(leftImage[2], dtype=np.float32), (512, 640, 4))
+left_img /= 255
+plt.imsave("left_image_new.png", left_img)
+right_img = np.reshape(np.asarray(rightImage[2], dtype=np.float32), (512, 640, 4))
+right_img /= 255
+plt.imsave("right_image_new.png", right_img)
+
+useRealTimeSimulation = 1
+
+if (useRealTimeSimulation):
+	p.setRealTimeSimulation(1)
+
+while 1:
+	if (useRealTimeSimulation):
+		p.setGravity(0,0,-10)
+		sleep(0.01) # Time in seconds.
+	else:
+		p.stepSimulation()