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// This file is part of the 64k demo project.
// It implements the core Renderer3D class logic.
#include "3d/renderer.h"
#include "generated/assets.h"
#include "gpu/effects/shader_composer.h"
#include "util/asset_manager.h"
#include <algorithm>
#include <cassert>
#include <cstring>
#include <iostream>
#if !defined(STRIP_ALL)
bool Renderer3D::s_debug_enabled_ = false;
#endif
void Renderer3D::init(WGPUDevice device, WGPUQueue queue,
WGPUTextureFormat format) {
device_ = device;
queue_ = queue;
format_ = format;
WGPUSamplerDescriptor sampler_desc = {};
sampler_desc.addressModeU = WGPUAddressMode_Repeat;
sampler_desc.addressModeV = WGPUAddressMode_Repeat;
sampler_desc.magFilter = WGPUFilterMode_Linear;
sampler_desc.minFilter = WGPUFilterMode_Linear;
sampler_desc.maxAnisotropy = 1;
default_sampler_ = wgpuDeviceCreateSampler(device_, &sampler_desc);
create_default_resources();
create_pipeline();
create_skybox_pipeline();
#if !defined(STRIP_ALL)
visual_debug_.init(device_, format_);
#endif
}
void Renderer3D::shutdown() {
#if !defined(STRIP_ALL)
visual_debug_.shutdown();
#endif
if (default_sampler_)
wgpuSamplerRelease(default_sampler_);
if (pipeline_)
wgpuRenderPipelineRelease(pipeline_);
if (pipeline_no_bvh_)
wgpuRenderPipelineRelease(pipeline_no_bvh_);
if (bind_group_)
wgpuBindGroupRelease(bind_group_);
if (mesh_pipeline_)
wgpuRenderPipelineRelease(mesh_pipeline_);
if (skybox_pipeline_)
wgpuRenderPipelineRelease(skybox_pipeline_);
if (skybox_bind_group_)
wgpuBindGroupRelease(skybox_bind_group_);
if (global_uniform_buffer_)
wgpuBufferRelease(global_uniform_buffer_);
if (object_storage_buffer_)
wgpuBufferRelease(object_storage_buffer_);
if (bvh_storage_buffer_)
wgpuBufferRelease(bvh_storage_buffer_);
if (depth_view_)
wgpuTextureViewRelease(depth_view_);
if (depth_texture_)
wgpuTextureRelease(depth_texture_);
// Clear mesh cache
for (auto& pair : mesh_cache_) {
if (pair.second.vertex_buffer)
wgpuBufferRelease(pair.second.vertex_buffer);
if (pair.second.index_buffer)
wgpuBufferRelease(pair.second.index_buffer);
}
mesh_cache_.clear();
}
void Renderer3D::resize(int width, int height) {
if (width == width_ && height == height_)
return;
width_ = width;
height_ = height;
if (depth_view_)
wgpuTextureViewRelease(depth_view_);
if (depth_texture_)
wgpuTextureRelease(depth_texture_);
WGPUTextureDescriptor desc = {};
desc.usage = WGPUTextureUsage_RenderAttachment;
desc.dimension = WGPUTextureDimension_2D;
desc.size = {(uint32_t)width, (uint32_t)height, 1};
desc.format = WGPUTextureFormat_Depth24Plus;
desc.mipLevelCount = 1;
desc.sampleCount = 1;
depth_texture_ = wgpuDeviceCreateTexture(device_, &desc);
WGPUTextureViewDescriptor view_desc = {};
view_desc.format = WGPUTextureFormat_Depth24Plus;
view_desc.dimension = WGPUTextureViewDimension_2D;
view_desc.aspect = WGPUTextureAspect_DepthOnly;
view_desc.arrayLayerCount = 1;
view_desc.mipLevelCount = 1;
depth_view_ = wgpuTextureCreateView(depth_texture_, &view_desc);
}
void Renderer3D::set_noise_texture(WGPUTextureView noise_view) {
noise_texture_view_ = noise_view;
}
void Renderer3D::set_sky_texture(WGPUTextureView sky_view) {
sky_texture_view_ = sky_view;
}
void Renderer3D::add_debug_aabb(const vec3& min, const vec3& max,
const vec3& color) {
#if !defined(STRIP_ALL)
visual_debug_.add_aabb(min, max, color);
#endif
}
void Renderer3D::render(const Scene& scene, const Camera& camera, float time,
WGPUTextureView target_view,
WGPUTextureView depth_view_opt) {
WGPUTextureView depth_view = depth_view_opt ? depth_view_opt : depth_view_;
if (!depth_view)
return;
WGPUCommandEncoder encoder = wgpuDeviceCreateCommandEncoder(device_, nullptr);
// --- Pass 1: Render Skybox (Clears color, clears and stores depth) ---
bool skybox_rendered = false;
if (sky_texture_view_ && skybox_pipeline_) {
WGPURenderPassColorAttachment sky_color_attachment = {};
gpu_init_color_attachment(sky_color_attachment, target_view);
sky_color_attachment.loadOp = WGPULoadOp_Clear; // Clear to black
sky_color_attachment.storeOp = WGPUStoreOp_Store;
sky_color_attachment.clearValue = {0.0f, 0.0f, 0.0f, 1.0f};
WGPURenderPassDepthStencilAttachment sky_depth_attachment = {};
sky_depth_attachment.view = depth_view;
sky_depth_attachment.depthLoadOp = WGPULoadOp_Clear; // Clear depth
sky_depth_attachment.depthStoreOp =
WGPUStoreOp_Store; // Store cleared depth
sky_depth_attachment.depthClearValue = 1.0f; // Farthest possible depth
WGPURenderPassDescriptor sky_pass_desc = {};
sky_pass_desc.colorAttachmentCount = 1;
sky_pass_desc.colorAttachments = &sky_color_attachment;
sky_pass_desc.depthStencilAttachment = &sky_depth_attachment;
WGPURenderPassEncoder sky_pass =
wgpuCommandEncoderBeginRenderPass(encoder, &sky_pass_desc);
wgpuRenderPassEncoderSetViewport(sky_pass, 0.0f, 0.0f, (float)width_,
(float)height_, 0.0f, 1.0f);
if (skybox_bind_group_)
wgpuBindGroupRelease(skybox_bind_group_);
WGPUBindGroupEntry bg_entries[3] = {};
bg_entries[0].binding = 0;
bg_entries[0].textureView = sky_texture_view_;
bg_entries[1].binding = 1;
bg_entries[1].sampler = default_sampler_;
bg_entries[2].binding = 2;
bg_entries[2].buffer = global_uniform_buffer_;
bg_entries[2].size = sizeof(GlobalUniforms);
WGPUBindGroupDescriptor bg_desc = {};
bg_desc.layout = wgpuRenderPipelineGetBindGroupLayout(skybox_pipeline_, 0);
bg_desc.entryCount = 3;
bg_desc.entries = bg_entries;
skybox_bind_group_ = wgpuDeviceCreateBindGroup(device_, &bg_desc);
wgpuBindGroupLayoutRelease(bg_desc.layout);
wgpuRenderPassEncoderSetPipeline(sky_pass, skybox_pipeline_);
wgpuRenderPassEncoderSetBindGroup(sky_pass, 0, skybox_bind_group_, 0,
nullptr);
wgpuRenderPassEncoderDraw(sky_pass, 3, 1, 0, 0); // Draw a full-screen quad
wgpuRenderPassEncoderEnd(sky_pass);
wgpuRenderPassEncoderRelease(sky_pass);
skybox_rendered = true;
}
// --- Pass 2: Render Scene Objects (Loads depth, writes depth) ---
WGPURenderPassColorAttachment obj_color_attachment = {};
gpu_init_color_attachment(obj_color_attachment, target_view);
obj_color_attachment.loadOp =
skybox_rendered ? WGPULoadOp_Load : WGPULoadOp_Clear; // Load or Clear
obj_color_attachment.storeOp = WGPUStoreOp_Store;
obj_color_attachment.clearValue = {0.05f, 0.05f, 0.05f,
1.0f}; // Dark gray if no sky
WGPURenderPassDepthStencilAttachment obj_depth_attachment = {};
obj_depth_attachment.view = depth_view;
obj_depth_attachment.depthLoadOp =
skybox_rendered ? WGPULoadOp_Load : WGPULoadOp_Clear; // Load or Clear
obj_depth_attachment.depthStoreOp = WGPUStoreOp_Store; // Store object depth
obj_depth_attachment.depthClearValue = 1.0f;
WGPURenderPassDescriptor obj_pass_desc = {};
obj_pass_desc.colorAttachmentCount = 1;
obj_pass_desc.colorAttachments = &obj_color_attachment;
obj_pass_desc.depthStencilAttachment = &obj_depth_attachment;
WGPURenderPassEncoder obj_pass =
wgpuCommandEncoderBeginRenderPass(encoder, &obj_pass_desc);
wgpuRenderPassEncoderSetViewport(obj_pass, 0.0f, 0.0f, (float)width_,
(float)height_, 0.0f, 1.0f);
draw(obj_pass, scene, camera, time);
wgpuRenderPassEncoderEnd(obj_pass);
wgpuRenderPassEncoderRelease(obj_pass);
WGPUCommandBuffer commands = wgpuCommandEncoderFinish(encoder, nullptr);
wgpuQueueSubmit(queue_, 1, &commands);
wgpuCommandBufferRelease(commands);
wgpuCommandEncoderRelease(encoder);
}
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