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Render and visualize CW and CCW quads

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This commit is contained in:
Sascha Willems 2019-03-29 08:45:47 +01:00
parent 8afe8d825d
commit b64f83cc68
1 changed files with 41 additions and 18 deletions
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57
examples/negativeviewportheight/negativeviewportheight.cpp
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@ -33,20 +33,27 @@ public:
int32_t offsety = 0;
int32_t offsetx = 0;
int32_t windingOrder = 1;
int32_t cullMode = 0;
int32_t cullMode = (int32_t)VK_CULL_MODE_BACK_BIT;
int32_t quadType = 0;
vks::Texture2D texture;
VkPipelineLayout pipelineLayout;
VkPipeline pipeline = VK_NULL_HANDLE;
VkDescriptorSetLayout descriptorSetLayout;
VkDescriptorSet descriptorSet;
struct DescriptorSets {
VkDescriptorSet CW;
VkDescriptorSet CCW;
} descriptorSets;
struct Textures {
vks::Texture2D CW;
vks::Texture2D CCW;
} textures;
struct Quad {
vks::Buffer verticesYUp;
vks::Buffer verticesYDown;
vks::Buffer indices;
vks::Buffer indicesCCW;
vks::Buffer indicesCW;
} quad;
VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
@ -62,7 +69,8 @@ public:
vkDestroyPipeline(device, pipeline, nullptr);
vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
texture.destroy();
textures.CW.destroy();
textures.CCW.destroy();
}
void buildCommandBuffers()
@ -114,13 +122,19 @@ public:
VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
VkDeviceSize offsets[1] = { 0 };
vkCmdBindIndexBuffer(drawCmdBuffers[i], quad.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
// Render the quad with clock wise and counter clock wise indices, visibility is determined by pipeline settings
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSets.CW, 0, nullptr);
vkCmdBindIndexBuffer(drawCmdBuffers[i], quad.indicesCW.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdBindVertexBuffers(drawCmdBuffers[i], 0, 1, quadType == 0 ? &quad.verticesYDown.buffer : &quad.verticesYUp.buffer, offsets);
vkCmdDrawIndexed(drawCmdBuffers[i], 6, 1, 0, 0, 0);
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSets.CCW, 0, nullptr);
vkCmdBindIndexBuffer(drawCmdBuffers[i], quad.indicesCCW.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(drawCmdBuffers[i], 6, 1, 0, 0, 0);
drawUI(drawCmdBuffers[i]);
vkCmdEndRenderPass(drawCmdBuffers[i]);
@ -131,7 +145,8 @@ public:
void loadAssets()
{
texture.loadFromFile(getAssetPath() + "textures/texture_orientation_test_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
textures.CW.loadFromFile(getAssetPath() + "textures/texture_orientation_cw_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
textures.CCW.loadFromFile(getAssetPath() + "textures/texture_orientation_ccw_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
// [POI] Create two quads with different Y orientations
@ -157,14 +172,17 @@ public:
{ 1.0f * ar, 1.0f, 1.0f, 1.0f, 0.0f },
{ 1.0f * ar, -1.0f, 1.0f, 1.0f, 1.0f },
};
std::vector<uint32_t> indices = { 2,1,0, 0,3,2 };
const VkMemoryPropertyFlags memoryPropertyFlags = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_VERTEX_BUFFER_BIT, memoryPropertyFlags, &quad.verticesYUp, sizeof(Vertex) * 4, verticesYPos.data()));
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_VERTEX_BUFFER_BIT, memoryPropertyFlags, &quad.verticesYDown, sizeof(Vertex) * 4, verticesYNeg.data()));
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_INDEX_BUFFER_BIT, memoryPropertyFlags, &quad.indices, indices.size() * sizeof(uint32_t), indices.data()));
// [POI] Create two set of indices, one for counter clock wise, and one for clock wise rendering
std::vector<uint32_t> indices = { 2,1,0, 0,3,2 };
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_INDEX_BUFFER_BIT, memoryPropertyFlags, &quad.indicesCCW, indices.size() * sizeof(uint32_t), indices.data()));
indices = { 0,1,2, 2,3,0 };
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_INDEX_BUFFER_BIT, memoryPropertyFlags, &quad.indicesCW, indices.size() * sizeof(uint32_t), indices.data()));
}
void setupDescriptors()
@ -178,14 +196,19 @@ public:
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCI, nullptr, &pipelineLayout));
VkDescriptorPoolSize poolSize = vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1);
VkDescriptorPoolCreateInfo descriptorPoolCI = vks::initializers::descriptorPoolCreateInfo(1, &poolSize, 1);
VkDescriptorPoolCreateInfo descriptorPoolCI = vks::initializers::descriptorPoolCreateInfo(1, &poolSize, 2);
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolCI, nullptr, &descriptorPool));
VkDescriptorSetAllocateInfo descriptorSetAI = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorSetAI, &descriptorSet));
VkWriteDescriptorSet writeDescriptorSet = vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &texture.descriptor);
vkUpdateDescriptorSets(device, 1, &writeDescriptorSet, 0, nullptr);
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorSetAI, &descriptorSets.CW));
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorSetAI, &descriptorSets.CCW));
std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
vks::initializers::writeDescriptorSet(descriptorSets.CW, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &textures.CW.descriptor),
vks::initializers::writeDescriptorSet(descriptorSets.CCW, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &textures.CCW.descriptor)
};
vkUpdateDescriptorSets(device, 2, &writeDescriptorSets[0], 0, nullptr);
}
void preparePipelines()
@ -199,7 +222,7 @@ public:
VkPipelineInputAssemblyStateCreateInfo inputAssemblyStateCI = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
VkPipelineColorBlendStateCreateInfo colorBlendStateCI = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
VkPipelineDepthStencilStateCreateInfo depthStencilStateCI = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
VkPipelineDepthStencilStateCreateInfo depthStencilStateCI = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_FALSE, VK_COMPARE_OP_LESS_OR_EQUAL);
VkPipelineViewportStateCreateInfo viewportStateCI = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
VkPipelineMultisampleStateCreateInfo multisampleStateCI = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
VkPipelineDynamicStateCreateInfo dynamicStateCI = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables.data(), static_cast<uint32_t>(dynamicStateEnables.size()), 0);