Implement Shadow Mapping - Githubissues

Slime-Dev / SlimeProject

SlimeEngine is my personal playground for learning modern Vulkan and its 1.3 features. This project serves as both a learning tool and a growing graphics framework, focusing on clean, understandable implementation of advanced Vulkan concepts. It's a work in progress, evolving as I explore and understand more about low-level graphics programming.

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Implement Shadow Mapping #40

Closed AlexMollard closed 3 months ago

AlexMollard commented 4 months ago

Objective

Enhance our Vulkan renderer by implementing shadow mapping to add realistic shadows to our 3D scenes, improving visual fidelity and depth perception.

Tasks

1. Shadow Map Texture Creation

[x] Create a depth texture to serve as the shadow map
[x] Ensure the texture format is compatible with dynamic rendering

2. Light Space Transformation

[x] Implement functions to calculate the light's view and projection matrices
[x] Create a uniform buffer to store the light's view-projection matrix

3. Shadow Pass Rendering

[x] Develop a new vertex shader for the shadow pass
[x] Create a VkRenderingInfo structure for the shadow pass
[x] Set up a VkRenderingAttachmentInfo for the depth attachment
[x] Implement logic to begin dynamic rendering for the shadow pass
[x] Render the scene from the light's perspective using vkCmdDraw or vkCmdDrawIndexed
[x] End the dynamic rendering for the shadow pass

4. Main Rendering Pass Updates

[x] Update the fragment shader to sample from the shadow map
[x] Implement shadow comparison and filtering techniques (e.g., PCF)
[x] Modify the main rendering pass VkRenderingInfo to include the shadow map as an input attachment
[x] Update pipeline layout to include shadow map sampler (This is done automatically with the shader parser)

5. Optimization

[ ] Implement cascaded shadow mapping for large scenes
[x] Add options for adjusting shadow map resolution and filtering quality (ImGui window)

Definition of Done

Shadow mapping is fully implemented and integrated into the Vulkan renderer
Shadows are visually correct and enhance the scene's depth and realism
Performance impact is within acceptable limits (less than 10% frame time increase)
Shadow quality is adjustable through engine parameters