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Code cleanup, comments, android assets

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saschawillems 2017-12-23 13:32:09 +01:00
parent 75b2a72957
commit 1b1bb4cbd2
2 changed files with 35 additions and 19 deletions
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44
examples/shadowmappingcascade/shadowmappingcascade.cpp
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@ -1,11 +1,21 @@
/*
* Vulkan Example - Cascaded shadow mapping for directional light sources
*
* Copyright (C) 2017 by Sascha Willems - www.saschawillems.de
*
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
Vulkan Example - Cascaded shadow mapping for directional light sources
Copyright (C) 2017 by Sascha Willems - www.saschawillems.de
This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/
/*
This example implements projective cascaded shadow mapping. This technique splits up the camera frustum into
multiple frustums with each getting it's own full-res shadow map, implemented as a layered depth-only image.
The shader then selects the proper shadow map layer depending on what split of the frustum the depth value
to compare fits into.
This results in a better shadow map resolution distribution that can be tweaked even further by increasing
the number of frustum splits.
A further optimization could be done using a geometry shader to do a single-pass render for the depth map
cascades instead of multiple passes (geometry shaders are not supported on all target devices).
*/
// Note: Could be simplified with a layered frame buffer using geometry shaders (not available on all devices)
#include <stdio.h>
#include <stdlib.h>
@ -27,7 +37,7 @@
#define ENABLE_VALIDATION false
#if defined(__ANDROID__)
#define SHADOWMAP_DIM 1024
#define SHADOWMAP_DIM 2048
#else
#define SHADOWMAP_DIM 4096
#endif
@ -157,12 +167,8 @@ public:
camera.type = Camera::CameraType::firstperson;
camera.movementSpeed = 2.5f;
camera.setPerspective(45.0f, (float)width / (float)height, zNear, zFar);
camera.setPosition(glm::vec3(0.0f, 0.62f, -2.4f));
camera.setRotation(glm::vec3(0.0f, -13.0f, 0.0f));
camera.setPosition(glm::vec3(-0.12f, 1.14f, -2.25f));
camera.setRotation(glm::vec3(-17.0f, 7.0f, 0.0f));
settings.overlay = true;
timer = 0.2f;
}
@ -209,8 +215,11 @@ public:
enabledFeatures.depthClamp = deviceFeatures.depthClamp;
}
// Setup resources used for the shadow map cascades
void prepareShadowMaps()
/*
Setup resources used by the depth pass
The depth image is layered with each layer storing one shadow map cascade
*/
void prepareDepthPass()
{
VkFormat depthFormat;
vks::tools::getSupportedDepthFormat(physicalDevice, &depthFormat);
@ -276,7 +285,6 @@ public:
Layered depth image and views
*/
// Layered depth image
VkImageCreateInfo imageInfo = vks::initializers::imageCreateInfo();
imageInfo.imageType = VK_IMAGE_TYPE_2D;
imageInfo.extent.width = SHADOWMAP_DIM;
@ -731,8 +739,10 @@ public:
updateUniformBuffers();
}
// Calculate frustum split depths and matrices for the shadow map cascades
// Based on https://johanmedestrom.wordpress.com/2016/03/18/opengl-cascaded-shadow-maps/
/*
Calculate frustum split depths and matrices for the shadow map cascades
Based on https://johanmedestrom.wordpress.com/2016/03/18/opengl-cascaded-shadow-maps/
*/
void updateCascades()
{
float cascadeSplits[SHADOW_MAP_CASCADE_COUNT];
@ -889,7 +899,7 @@ public:
loadAssets();
updateLight();
updateCascades();
prepareShadowMaps();
prepareDepthPass();
prepareUniformBuffers();
setupLayoutsAndDescriptors();
preparePipelines();