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https://github.com/Kelsidavis/WoWee.git
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4fc3689dcc
Skybox: replace sphere-mesh approach with a fullscreen triangle that reconstructs the world-space ray direction analytically via inverse projection/view matrices. Eliminates clip.w=0 degeneracy at the horizon and correctly maps altitude to dir.z in the Z-up coordinate system. Clouds: hemisphere mesh was storing altitude in aPos.y (Y-up convention); the Z-up view matrix projected this sideways, making clouds appear vertical. Store altitude in aPos.z and update the fragment shader to read dir.z as altitude and dir.xy as the horizontal UV plane.
81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
#pragma once
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#include <memory>
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#include <glm/glm.hpp>
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#include <vulkan/vulkan.h>
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#include <vk_mem_alloc.h>
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namespace wowee {
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namespace rendering {
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class VkContext;
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/**
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* Skybox renderer
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*
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* Renders an atmospheric sky gradient using a fullscreen triangle.
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* No vertex buffer: 3 vertices cover the entire screen via gl_VertexIndex.
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* World-space ray direction is reconstructed from the inverse view+projection.
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*/
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class Skybox {
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public:
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Skybox();
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~Skybox();
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bool initialize(VkContext* ctx, VkDescriptorSetLayout perFrameLayout);
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void shutdown();
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/**
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* Render the skybox
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* @param cmd Command buffer to record into
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* @param perFrameSet Per-frame descriptor set (set 0, contains camera UBO)
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* @param timeOfDay Time of day in hours (0-24), affects sky color
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*/
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void render(VkCommandBuffer cmd, VkDescriptorSet perFrameSet, float timeOfDay = 12.0f);
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/**
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* Enable/disable skybox rendering
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*/
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void setEnabled(bool enabled) { renderingEnabled = enabled; }
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bool isEnabled() const { return renderingEnabled; }
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/**
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* Set time of day (0-24 hours)
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* 0 = midnight, 6 = dawn, 12 = noon, 18 = dusk, 24 = midnight
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*/
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void setTimeOfDay(float time);
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float getTimeOfDay() const { return timeOfDay; }
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/**
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* Enable/disable time progression
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*/
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void setTimeProgression(bool enabled) { timeProgressionEnabled = enabled; }
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bool isTimeProgressionEnabled() const { return timeProgressionEnabled; }
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/**
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* Update time progression
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*/
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void update(float deltaTime);
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/**
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* Get horizon color for fog (public for fog system)
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*/
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glm::vec3 getHorizonColor(float time) const;
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private:
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glm::vec3 getSkyColor(float altitude, float time) const;
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glm::vec3 getZenithColor(float time) const;
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VkContext* vkCtx = nullptr;
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VkPipeline pipeline = VK_NULL_HANDLE;
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VkPipelineLayout pipelineLayout = VK_NULL_HANDLE;
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float timeOfDay = 12.0f; // Default: noon
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float timeSpeed = 1.0f; // 1.0 = 1 hour per real second
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bool timeProgressionEnabled = false;
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bool renderingEnabled = true;
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};
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} // namespace rendering
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} // namespace wowee
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