chaos game

src/Main.cpp

@@ -139,7 +139,7 @@ int main()
 	GLuint vertexBuffer;
 	glCreateBuffers(1, &vertexBuffer);
 
-	constexpr int DEPTH = 14;
+	constexpr int DEPTH = 6;
 
 	auto vertices = GetPoints(DEPTH);
 
@@ -157,40 +157,19 @@ int main()
 
 	Timer timer;
 
+	constexpr int PARTICLE_COUNT = 64 * 5000;
+
 	GLuint ssbo;
 	glGenBuffers(1, &ssbo);
 	glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
 	glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, ssbo);
-	glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(float) * vertices.size(), nullptr, GL_DYNAMIC_COPY); // sizeof(data) only works for statically sized C/C++ arrays.
+	glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(float) * PARTICLE_COUNT, nullptr, GL_DYNAMIC_COPY); // sizeof(data) only works for statically sized C/C++ arrays.
 
 	float lastTime = (float)glfwGetTime();
 
 	int fps = 0;
 	float secondsTimer = 0.0f;
 
-	// Compute
-	glUseProgram(s_ComputeShader);
-	glBindImageTexture(0, fb.ColorAttachment.Handle, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA32F);
-
-	std::size_t count = 1;
-	for (std::size_t i = 0; i < DEPTH; i++)
-	{
-		glUniform1ui(0, count);
-		std::cout << count << std::endl;
-
-		int dispatchCount = (count - 1) / 64 + 1;
-		std::cout << "DC : " <<dispatchCount<< std::endl;
-
-		glDispatchCompute(dispatchCount, 1, 1);
-
-		// Ensure all writes to the image are complete
-		glMemoryBarrier(GL_SHADER_IMAGE_ACCESS_BARRIER_BIT);
-
-		count *= 3;
-	}
-
-	std::cout << "Generated points in " << timer.ElapsedMillis() << " ms\n";
-
 	while (!glfwWindowShouldClose(window))
 	{
 		// ScopedTimer timer("Main Loop");
@@ -219,19 +198,19 @@ int main()
 			AttachTextureToFramebuffer(fb, computeShaderTexture);
 		}
 
+		// Compute
+
+		glUseProgram(s_ComputeShader);
+		glDispatchCompute(PARTICLE_COUNT / 64, 1, 1);
+
+		// Ensure all writes to the image are complete
+		glMemoryBarrier(GL_SHADER_IMAGE_ACCESS_BARRIER_BIT);
+
 		// Graphics
-		glBindFramebuffer(GL_FRAMEBUFFER, fb.Handle);
 		glUseProgram(s_GraphicsShader);
 
 		glBindVertexArray(vertexArray);
-		glDrawArraysInstanced(GL_POINTS, 0, 1, vertices.size());
-
-		glBindFramebuffer(GL_FRAMEBUFFER, 0);
-
-		// Blit
-		{
-			BlitFramebufferToSwapchain(fb);
-		}
+		glDrawArraysInstanced(GL_POINTS, 0, 1, PARTICLE_COUNT);
 
 		glfwSwapBuffers(window);
 		glfwPollEvents();