I am trying to draw a triangle in the render pass, but I am unable to get any result from vkDraw and there is no error message output by validation-layers anyway, it’s weird.
Render::BeginRenderPass(renderTarget, primaryCamera);
{
// Render::Draw(pipeline);
auto pl = std::dynamic_pointer_cast<Vulkan::Pipeline>(pipeline);
auto drawCmdBuf = Vulkan::RenderContext::That->GetCommandBuffer();
// Bind descriptor sets describing shader binding points
vkCmdBindDescriptorSets(*drawCmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, pl->Layout(), 0, 1, &pl->GetDescriptorSet(), 0, nullptr);
// Bind the rendering pipeline
// The pipeline (state object) contains all states of the rendering pipeline, binding it will set all the states specified at pipeline creation time
vkCmdBindPipeline(*drawCmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, *pl);
// Bind triangle vertex buffer (contains position and colors)
VkDeviceSize offsets[1] = { 0 };
vkCmdBindVertexBuffers(*drawCmdBuf, 0, 1, &vertices.buffer, offsets);
// Bind triangle index buffer
vkCmdBindIndexBuffer(*drawCmdBuf, indices.buffer, 0, VK_INDEX_TYPE_UINT32);
// Draw indexed triangle
vkCmdDrawIndexed(*drawCmdBuf, indices.count, 1, 0, 0, 1);
}
Render::EndRenderPass();
The above is how I bind vertex buffer and draw indexed.
struct Vertex {
float position[3];
float color[3];
};
const std::vector<Vertex> vertices = {
{ { 1.0f, 1.0f, 0.0f }, { 1.0f, 0.0f, 0.0f } },
{ { -1.0f, 1.0f, 0.0f }, { 0.0f, 1.0f, 0.0f } },
{ { 0.0f, -1.0f, 0.0f }, { 0.0f, 0.0f, 1.0f } }
};
const std::vector<uint32_t> indices = {
0, 1, 2
};
// Vertex input binding
// This example uses a single vertex input binding at binding point 0 (see vkCmdBindVertexBuffers)
VkVertexInputBindingDescription vertexInputBinding = {};
vertexInputBinding.binding = 0;
vertexInputBinding.stride = sizeof(Vertex);
vertexInputBinding.inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
// Input attribute bindings describe shader attribute locations and memory layouts
std::array<VkVertexInputAttributeDescription, 2> vertexInputAttributs;
// These match the following shader layout (see triangle.vert):
// layout (location = 0) in vec3 inPos;
// layout (location = 1) in vec3 inColor;
// Attribute location 0: Position
vertexInputAttributs[0].binding = 0;
vertexInputAttributs[0].location = 0;
// Position attribute is three 32 bit signed (SFLOAT) floats (R32 G32 B32)
vertexInputAttributs[0].format = VK_FORMAT_R32G32B32_SFLOAT;
vertexInputAttributs[0].offset = offsetof(Vertex, position);
// Attribute location 1: Color
vertexInputAttributs[1].binding = 0;
vertexInputAttributs[1].location = 1;
// Color attribute is three 32 bit signed (SFLOAT) floats (R32 G32 B32)
vertexInputAttributs[1].format = VK_FORMAT_R32G32B32_SFLOAT;
vertexInputAttributs[1].offset = offsetof(Vertex, color);
// Vertex input state used for pipeline creation
VkPipelineVertexInputStateCreateInfo vertexInputState = {};
vertexInputState.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
vertexInputState.vertexBindingDescriptionCount = 1;
vertexInputState.pVertexBindingDescriptions = &vertexInputBinding;
vertexInputState.vertexAttributeDescriptionCount = 2;
vertexInputState.pVertexAttributeDescriptions = vertexInputAttributs.data();
The above is how I create vertex input.
#version 450
layout (location = 0) in vec3 inPos;
layout (location = 1) in vec3 inColor;
layout (location = 0) out vec3 outColor;
void main()
{
outColor = inColor;
gl_Position = vec4(inPos.xyz, 1.0);
}
#version 450
layout (location = 0) in vec3 inColor;
layout (location = 0) out vec4 outFragColor;
void main()
{
outFragColor = vec4(inColor, 1.0);
}
The above is vertex and fragment shader. Is this shader is incorrect?
The final color attachment I got used as a texture. Only the clear color of the render pass is shown, but there is no triangle from the shader. I’m trying to copy codes from the tutorial but it still gets nothing. The most trouble is that there is no error or warning message generated by validation layers. Is there anyone that has the same or familiar situation like this or knows how to get it resolved? I beg your pardon here for my noobiness.
