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Custom sampler for particle textures

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This commit is contained in:
saschawillems 2016-03-15 22:53:23 +01:00
parent e9784afba4
commit 598da3670e
2 changed files with 32 additions and 2 deletions
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34
particlefire/particlefire.cpp
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@ -60,6 +60,10 @@ public:
struct {
vkTools::VulkanTexture smoke;
vkTools::VulkanTexture fire;
// We use a custom sampler to change some sampler
// attributes required for rotation the uv coordinates
// inside the shader for alpha blended textures
VkSampler sampler;
} particles;
struct {
vkTools::VulkanTexture colorMap;
@ -146,6 +150,8 @@ public:
vkFreeMemory(device, uniformData.fire.memory, nullptr);
vkMeshLoader::freeMeshBufferResources(device, &meshes.environment.buffers);
vkDestroySampler(device, textures.particles.sampler, nullptr);
}
void buildCommandBuffers()
@ -353,6 +359,7 @@ public:
"./../data/textures/particle_fire.ktx",
VK_FORMAT_BC3_UNORM_BLOCK,
&textures.particles.fire);
// Floor
textureLoader->loadTexture(
"./../data/textures/fireplace_colormap_bc3.ktx",
@ -362,6 +369,29 @@ public:
"./../data/textures/fireplace_normalmap_bc3.ktx",
VK_FORMAT_BC3_UNORM_BLOCK,
&textures.floor.normalMap);
// Create a custom sampler to be used with the particle textures
// Create sampler
VkSamplerCreateInfo samplerCreateInfo = vkTools::initializers::samplerCreateInfo();
samplerCreateInfo.magFilter = VK_FILTER_LINEAR;
samplerCreateInfo.minFilter = VK_FILTER_LINEAR;
samplerCreateInfo.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
// Different address mode
samplerCreateInfo.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER;
samplerCreateInfo.addressModeV = samplerCreateInfo.addressModeU;
samplerCreateInfo.addressModeW = samplerCreateInfo.addressModeU;
samplerCreateInfo.mipLodBias = 0.0f;
samplerCreateInfo.compareOp = VK_COMPARE_OP_NEVER;
samplerCreateInfo.minLod = 0.0f;
// Both particle textures have the same number of mip maps
samplerCreateInfo.maxLod = textures.particles.fire.mipLevels;
// Enable anisotropic filtering
samplerCreateInfo.maxAnisotropy = 8;
samplerCreateInfo.anisotropyEnable = VK_TRUE;
// Use a different border color (than the normal texture loader) for additive blending
samplerCreateInfo.borderColor = VK_BORDER_COLOR_FLOAT_TRANSPARENT_BLACK;
VkResult err = vkCreateSampler(device, &samplerCreateInfo, nullptr, &textures.particles.sampler);
assert(!err);
}
void loadMeshes()
@ -503,12 +533,12 @@ public:
// Image descriptor for the color map texture
VkDescriptorImageInfo texDescriptorSmoke =
vkTools::initializers::descriptorImageInfo(
textures.particles.smoke.sampler,
textures.particles.sampler,
textures.particles.smoke.view,
VK_IMAGE_LAYOUT_GENERAL);
VkDescriptorImageInfo texDescriptorFire =
vkTools::initializers::descriptorImageInfo(
textures.particles.fire.sampler,
textures.particles.sampler,
textures.particles.fire.view,
VK_IMAGE_LAYOUT_GENERAL);