Fix mirroring in png output

Restrict starting value range to positive y-values, probably improving
random quality

2 files changed, 11 insertions, 3 deletions

diff --git a/BuddhaTest/src/BuddhaTest.cpp b/BuddhaTest/src/BuddhaTest.cpp
index f8b9074..09a3cf1 100644
--- a/BuddhaTest/src/BuddhaTest.cpp
+++ b/BuddhaTest/src/BuddhaTest.cpp
@@ -21,6 +21,14 @@ int main()
     unsigned int orbitLengthGreen = 100;

     unsigned int orbitLengthBlue = 1000;

 

+    unsigned int localWorkgroupSizeX = 1024;

+    unsigned int localWorkgroupSizeY = 1;

+    unsigned int localWorkgroupSizeZ = 1;

+

+    unsigned int globalWorkGroupSizeX = 1024;

+    unsigned int globalWorkGroupSizeY = 1;

+    unsigned int globalWorkGroupSizeZ = 1;

+

 	GLFWwindow* window;

 

 	/* Initialize the library */

@@ -80,7 +88,7 @@ int main()
 	// Create and compile our GLSL program from the shaders

 	GLuint VertexAndFragmentShaders = Helpers::LoadShaders("Shaders/BuddhaVertex.glsl", "Shaders/BuddhaFragment.glsl");

 	//Do the same for the compute shader:

-    GLuint ComputeShader = Helpers::LoadComputeShader("Shaders/BuddhaCompute.glsl", 1024, 1, 1);

+    GLuint ComputeShader = Helpers::LoadComputeShader("Shaders/BuddhaCompute.glsl", localWorkgroupSizeX, localWorkgroupSizeY, localWorkgroupSizeZ);

 

     uint32_t iterationCount{0};

     glUseProgram(ComputeShader);

@@ -97,7 +105,7 @@ int main()
 		glUseProgram(ComputeShader);

         //increase iterationCount, which is used for pseudo random generation

         glUniform1ui(iterationCountUniformHandle,++iterationCount);

-        glDispatchCompute(1024, 1, 1);

+        glDispatchCompute(globalWorkGroupSizeX, globalWorkGroupSizeY, globalWorkGroupSizeZ);

 

         //before reading the values in the ssbo, we need a memory barrier:

         glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT); //I hope this is the correct (and only required) bit

diff --git a/BuddhaTest/src/Helpers.cpp b/BuddhaTest/src/Helpers.cpp
index b092dc2..abe09fd 100644
--- a/BuddhaTest/src/Helpers.cpp
+++ b/BuddhaTest/src/Helpers.cpp
@@ -174,7 +174,7 @@ namespace Helpers
         }

         for(int i = 0; i < height/2;++i)

         {

-            for(int j = 0; j < width;++j)

+            for(int j = 0; j < width*3;++j)

             {

                 png_byte average = (rows[i][j] + rows[height-i-1][j])/2;

                 rows[i][j] = rows[height-i-1][j] = average;