完成顶点缓冲区输入描述创建

VulkanTutorial.cpp

@@ -954,12 +954,16 @@ void HelloTriangleApplication::createGraphicPipeline()
 	VkPipelineShaderStageCreateInfo shaderStages[] = { vertShaderStageInfo,fragShaderStageInfo };
 
 	//顶点输入
+
+	auto bindingDescription = Vertex::getBindingDescription();
+	auto attributeDescriptions = Vertex::getAttributeDescriptions();
+
 	VkPipelineVertexInputStateCreateInfo vertexInputInfo{};
 	vertexInputInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
-	vertexInputInfo.vertexBindingDescriptionCount = 0;
-	vertexInputInfo.pVertexBindingDescriptions = nullptr;
-	vertexInputInfo.vertexAttributeDescriptionCount = 0;
-	vertexInputInfo.pVertexAttributeDescriptions = nullptr;
+	vertexInputInfo.vertexBindingDescriptionCount = 1;
+	vertexInputInfo.pVertexBindingDescriptions = &bindingDescription;
+	vertexInputInfo.vertexAttributeDescriptionCount = static_cast<uint32_t>(attributeDescriptions.size());
+	vertexInputInfo.pVertexAttributeDescriptions = attributeDescriptions.data();
 
 
 	//使用动态状态并保留视口和剪刀裁剪状态
@@ -1177,4 +1181,27 @@ int main()
 	return EXIT_SUCCESS;
 }
 
+VkVertexInputBindingDescription HelloTriangleApplication::Vertex::getBindingDescription()
+{
+	VkVertexInputBindingDescription bindingDescription{};
+	bindingDescription.binding = 0;
+	bindingDescription.stride = sizeof(Vertex);
+	bindingDescription.inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
 
+	return bindingDescription;
+}
+
+std::array<VkVertexInputAttributeDescription,2> HelloTriangleApplication::Vertex::getAttributeDescriptions()
+{
+	std::array<VkVertexInputAttributeDescription,2> attributeDescriptions{};
+	attributeDescriptions[0].binding = 0;
+	attributeDescriptions[0].location = 0;
+	attributeDescriptions[0].format = VK_FORMAT_R32G32_SFLOAT;
+	attributeDescriptions[0].offset = offsetof(Vertex, pos);
+	attributeDescriptions[1].binding = 0;
+	attributeDescriptions[1].location = 1;
+	attributeDescriptions[1].format = VK_FORMAT_R32G32B32_SFLOAT;
+	attributeDescriptions[1].offset = offsetof(Vertex, color);
+
+	return attributeDescriptions;
+}

VulkanTutorial.h

@@ -8,6 +8,7 @@
 #include<GLFW/glfw3.h>
 
 #include<vulkan/vulkan.h>
+#include<glm/glm.hpp>
 #include <iostream>
 #include <optional>
 #include <stdexcept>
@@ -18,6 +19,7 @@
 #include <cstdint>
 #include <limits>
 #include <algorithm>
+#include <array>
 
 #include <fstream>
 
@@ -101,6 +103,20 @@ private:
 
 	bool framebufferResized = false;
 
+	struct Vertex
+	{
+		glm::vec2 pos;
+		glm::vec3 color;
+		static VkVertexInputBindingDescription getBindingDescription();
+		static std::array<VkVertexInputAttributeDescription, 2> getAttributeDescriptions();
+	};
+
+	const std::vector<Vertex> vertices = {
+	{{0.0f, -0.5f}, {1.0f, 0.0f, 0.0f}},
+	{{0.5f, 0.5f}, {0.0f, 1.0f, 0.0f}},
+	{{-0.5f, 0.5f}, {0.0f, 0.0f, 1.0f}}
+	};
+
 	void initWindow(int Width, int Height);
 
 	void createInstance();

shaders/triangle.vert

@@ -1,20 +1,13 @@
 #version 450
 
+layout(location = 0) in vec2 inPosition;
+layout(location = 1) in vec3 inColor;
+
 layout(location = 0) out vec3 fragColor;
 
-vec2 positions[3] = vec2[](
-    vec2(0.0f, -0.5f),
-    vec2(0.5f, 0.5f),
-    vec2(-0.5f, 0.5f)
-);
 
-vec3 colors[3] = vec3[](
-    vec3(1.0,0.0,0.0),
-    vec3(0.0,1.0,0.0),
-    vec3(0.0,0.0,1.0)
-);
 
 void main(){
-    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
-    fragColor = colors[gl_VertexIndex];
+    gl_Position = vec4(inPosition, 0.0, 1.0);
+    fragColor = inColor;
 }