Rays now use float4 buffer for faster access

demos/optical_bench/src/Optix Files/laser_caster.cu

@@ -28,7 +28,7 @@ rtDeclareVariable(float,          laserBeamWidth, , );
 
 rtBuffer<int, 2>   			laserIndex;
 rtBuffer<float3, 2>   		laserDir;
-rtBuffer<float3, 1>			result_laser;
+rtBuffer<float4, 1>			result_laser;
 
 
 RT_PROGRAM void laser_caster(){
@@ -62,11 +62,11 @@ RT_PROGRAM void laser_caster(){
 	for(int i = 0; i < max_depth_laser * 2; i += 2){
 		//Determine if this launch_index, depth or last ray should trigger new cast
 		if(cast_ray || prd.done || prd.depth >= max_depth_laser){ // just write rest of data as "invalid"
-			if(launch_index.z == 0) result_laser[startIndex + i] = make_float3(0,-1,0);
-			if(launch_index.z == 0) result_laser[startIndex + i + 1] = make_float3(0,-1,0);
+			if(launch_index.z == 0) result_laser[startIndex + i] = make_float4(0,-1,0,1);
+			if(launch_index.z == 0) result_laser[startIndex + i + 1] = make_float4(0,-1,0,1);
 			continue;
 		}
-		if(launch_index.z == 0) result_laser[startIndex + i] = prd.origin;
+		if(launch_index.z == 0) result_laser[startIndex + i] = make_float4(prd.origin,1);
 		
 		ray.origin = prd.origin;
 		ray.direction = prd.direction;
@@ -74,6 +74,6 @@ RT_PROGRAM void laser_caster(){
 		
 		// Update ray data for the next path segment
 		prd.depth++;
-		if(launch_index.z == 0) result_laser[startIndex + i + 1] = prd.origin;
+		if(launch_index.z == 0) result_laser[startIndex + i + 1] = make_float4(prd.origin,1);
 	}
 }
\ No newline at end of file

demos/optical_bench/src/ray_pass.cpp

@@ -107,7 +107,7 @@ void RayPass::Initialize() {
   glBindVertexArray(vaoOpenGL);
   glEnableVertexAttribArray(0);  // Vertices
   glBindBuffer(GL_ARRAY_BUFFER, bufferOpenGLLaserVertices);
-  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, NULL);
+  glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, NULL);
   glEnableVertexAttribArray(1);  // Colors
   glBindBuffer(GL_ARRAY_BUFFER, bufferOpenGLLaserColors);
   glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, NULL);
@@ -120,7 +120,7 @@ void RayPass::Initialize() {
 
   glBindBuffer(GL_ARRAY_BUFFER, bufferOpenGLLaserVertices);
   glBufferData(GL_ARRAY_BUFFER,
-               laser_max_depth * 50 * 50 * 2 * 3 * sizeof(float), NULL,
+               laser_max_depth * 50 * 50 * 2 * 4 * sizeof(float), NULL,
                GL_DYNAMIC_DRAW);
   glBindBuffer(GL_ARRAY_BUFFER, 0);
 
@@ -269,7 +269,7 @@ void RayPass::createLaser() {
 
   bufferLaserOptix = context->createBufferFromGLBO(RT_BUFFER_OUTPUT,
                                                    bufferOpenGLLaserVertices);
-  bufferLaserOptix->setFormat(RT_FORMAT_FLOAT3);
+  bufferLaserOptix->setFormat(RT_FORMAT_FLOAT4);
   bufferLaserOptix->setSize(laser_max_depth * 50 * 50 * 2);
   context["result_laser"]->set(bufferLaserOptix);
 

resources/shader/ray.vert

@@ -21,12 +21,12 @@
 //------------------------------------------------------------------------------
 #version 450
 
-layout(location = 0) in vec3 in_position;
+layout(location = 0) in vec4 in_position;
 layout(location = 1) in vec3 in_color;
 out vec3 color;
 
 void main(void)
 {
-	gl_Position = vec4(in_position, 1.0f);
+	gl_Position = in_position;
 	color = in_color;
 }