Added background colour to consts.h

src/consts.cu

@@ -30,6 +30,7 @@ __device__ Point3 d_cameraPos;
 __device__ Vec3 d_cameraDir;
 __device__ Vec3 d_cameraUp;
 __device__ Point3 d_lightPos;
+__device__ Color3 d_backgroundColor;
 
 // Point3 h_cameraPos = Point3::init(300.0f, 200.0f, -700.0f);  // Camera for full data set
 Point3 h_cameraPos = Point3::init(50.0f, -50.0f, -75.0f);  // Camera for partially trimmed data set (TODO: Probably upside down atm)
@@ -37,6 +38,7 @@ Vec3 center = Vec3::init((float)VOLUME_WIDTH/2.0f, (float)VOLUME_HEIGHT/2.0f, (f
 Vec3 h_cameraDir = (center - h_cameraPos).normalize();
 Vec3 h_cameraUp = Vec3::init(0.0, 0.0, 1.0).normalize();
 Point3 h_lightPos = Point3::init(1.5, 2.0, -1.0);
+Color3 h_backgroundColor = Color3::init(0.1f, 0.1f, 0.1f);
 
 
 // Copy the above values to the device
@@ -52,4 +54,5 @@ void copyConstantsToDevice() {
     cudaMemcpyToSymbol(d_cameraDir, &h_cameraDir, sizeof(Vec3));
     cudaMemcpyToSymbol(d_cameraUp, &h_cameraUp, sizeof(Vec3));
     cudaMemcpyToSymbol(d_lightPos, &h_lightPos, sizeof(Point3));
+    cudaMemcpyToSymbol(d_backgroundColor, &h_backgroundColor, sizeof(Color3));
 }