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// This file is part of the 64k demo project.
// It implements RotatingCubeEffect for bump-mapped rotating cube rendering.
// Uses auxiliary texture masking to render only inside a circular region.
#include "gpu/effects/rotating_cube_effect.h"
#include "gpu/effects/shader_composer.h"
#include "generated/assets.h"
#include "util/asset_manager_utils.h"
RotatingCubeEffect::RotatingCubeEffect(const GpuContext& ctx) : Effect(ctx) {}
RotatingCubeEffect::~RotatingCubeEffect() {
if (mask_sampler_) wgpuSamplerRelease(mask_sampler_);
if (noise_sampler_) wgpuSamplerRelease(noise_sampler_);
if (noise_view_) wgpuTextureViewRelease(noise_view_);
if (noise_texture_) wgpuTextureRelease(noise_texture_);
if (bind_group_1_) wgpuBindGroupRelease(bind_group_1_);
if (bind_group_0_) wgpuBindGroupRelease(bind_group_0_);
if (pipeline_) wgpuRenderPipelineRelease(pipeline_);
}
void RotatingCubeEffect::init(MainSequence* demo) {
demo_ = demo;
uniform_buffer_ =
gpu_create_buffer(ctx_.device, sizeof(Uniforms),
WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst);
object_buffer_ =
gpu_create_buffer(ctx_.device, sizeof(ObjectData),
WGPUBufferUsage_Storage | WGPUBufferUsage_CopyDst);
const WGPUTextureDescriptor tex_desc = {
.usage = WGPUTextureUsage_TextureBinding | WGPUTextureUsage_RenderAttachment,
.dimension = WGPUTextureDimension_2D,
.size = {1, 1, 1},
.format = WGPUTextureFormat_RGBA8Unorm,
.mipLevelCount = 1,
.sampleCount = 1,
};
noise_texture_ = wgpuDeviceCreateTexture(ctx_.device, &tex_desc);
noise_view_ = wgpuTextureCreateView(noise_texture_, nullptr);
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;
noise_sampler_ = wgpuDeviceCreateSampler(ctx_.device, &sampler_desc);
WGPUSamplerDescriptor mask_sampler_desc = {};
mask_sampler_desc.addressModeU = WGPUAddressMode_ClampToEdge;
mask_sampler_desc.addressModeV = WGPUAddressMode_ClampToEdge;
mask_sampler_desc.magFilter = WGPUFilterMode_Linear;
mask_sampler_desc.minFilter = WGPUFilterMode_Linear;
mask_sampler_desc.maxAnisotropy = 1;
mask_sampler_ = wgpuDeviceCreateSampler(ctx_.device, &mask_sampler_desc);
size_t shader_size;
const char* shader_code =
(const char*)GetAsset(AssetId::ASSET_MASKED_CUBE_SHADER, &shader_size);
ShaderComposer::CompositionMap composition_map;
composition_map["render/scene_query_mode"] = "render/scene_query_linear";
composed_shader_ = ShaderComposer::Get().Compose(
{}, std::string(shader_code, shader_size), composition_map);
WGPUShaderSourceWGSL wgsl_src = {};
wgsl_src.chain.sType = WGPUSType_ShaderSourceWGSL;
wgsl_src.code = str_view(composed_shader_.c_str());
WGPUShaderModuleDescriptor shader_desc = {};
shader_desc.nextInChain = &wgsl_src.chain;
WGPUShaderModule shader_module =
wgpuDeviceCreateShaderModule(ctx_.device, &shader_desc);
const WGPUColorTargetState color_target = {
.format = ctx_.format,
.writeMask = WGPUColorWriteMask_All,
};
const WGPUDepthStencilState depth_stencil = {
.format = WGPUTextureFormat_Depth24Plus,
.depthWriteEnabled = WGPUOptionalBool_True,
.depthCompare = WGPUCompareFunction_Less,
};
WGPUFragmentState fragment = {};
fragment.module = shader_module;
fragment.entryPoint = str_view("fs_main");
fragment.targetCount = 1;
fragment.targets = &color_target;
WGPURenderPipelineDescriptor pipeline_desc = {};
pipeline_desc.vertex.module = shader_module;
pipeline_desc.vertex.entryPoint = str_view("vs_main");
pipeline_desc.primitive.topology = WGPUPrimitiveTopology_TriangleList;
pipeline_desc.primitive.cullMode = WGPUCullMode_None;
pipeline_desc.depthStencil = &depth_stencil;
pipeline_desc.multisample.count = 1;
pipeline_desc.multisample.mask = 0xFFFFFFFF;
pipeline_desc.fragment = &fragment;
pipeline_ = wgpuDeviceCreateRenderPipeline(ctx_.device, &pipeline_desc);
wgpuShaderModuleRelease(shader_module);
const WGPUBindGroupEntry entries_0[] = {
{.binding = 0, .buffer = uniform_buffer_.buffer, .size = sizeof(Uniforms)},
{.binding = 1, .buffer = object_buffer_.buffer, .size = sizeof(ObjectData)},
{.binding = 3, .textureView = noise_view_},
{.binding = 4, .sampler = noise_sampler_},
};
const WGPUBindGroupDescriptor bg_desc_0 = {
.layout = wgpuRenderPipelineGetBindGroupLayout(pipeline_, 0),
.entryCount = 4,
.entries = entries_0,
};
bind_group_0_ = wgpuDeviceCreateBindGroup(ctx_.device, &bg_desc_0);
WGPUTextureView mask_view = demo_->get_auxiliary_view("circle_mask");
const WGPUBindGroupEntry entries_1[] = {
{.binding = 0, .textureView = mask_view},
{.binding = 1, .sampler = mask_sampler_},
};
const WGPUBindGroupDescriptor bg_desc_1 = {
.layout = wgpuRenderPipelineGetBindGroupLayout(pipeline_, 1),
.entryCount = 2,
.entries = entries_1,
};
bind_group_1_ = wgpuDeviceCreateBindGroup(ctx_.device, &bg_desc_1);
}
void RotatingCubeEffect::render(WGPURenderPassEncoder pass, float time,
float beat, float intensity,
float aspect_ratio) {
rotation_ += 0.016f * 1.5f;
const vec3 camera_pos = vec3(0, 0, 5);
const vec3 target = vec3(0, 0, 0);
const vec3 up = vec3(0, 1, 0);
const mat4 view = mat4::look_at(camera_pos, target, up);
const float fov = 60.0f * 3.14159f / 180.0f;
const mat4 proj = mat4::perspective(fov, aspect_ratio, 0.1f, 100.0f);
const mat4 view_proj = proj * view;
const quat rot = quat::from_axis(vec3(0.3f, 1.0f, 0.2f), rotation_);
const mat4 T = mat4::translate(vec3(0, 0, 0));
const mat4 R = rot.to_mat();
const mat4 S = mat4::scale(vec3(1.5f, 1.5f, 1.5f));
const mat4 model = T * R * S;
const mat4 inv_model = model.inverse();
const Uniforms uniforms = {
.view_proj = view_proj,
.inv_view_proj = view_proj.inverse(),
.camera_pos_time = vec4(camera_pos.x, camera_pos.y, camera_pos.z, time),
.params = vec4(1.0f, 0.0f, 0.0f, 0.0f),
.resolution = vec2(1280.0f, 720.0f),
};
const ObjectData obj_data = {
.model = model,
.inv_model = inv_model,
.color = vec4(0.8f, 0.4f, 0.2f, 1.0f),
.params = vec4(1.0f, 0.0f, 0.0f, 0.0f),
};
wgpuQueueWriteBuffer(ctx_.queue, uniform_buffer_.buffer, 0, &uniforms,
sizeof(Uniforms));
wgpuQueueWriteBuffer(ctx_.queue, object_buffer_.buffer, 0, &obj_data,
sizeof(ObjectData));
wgpuRenderPassEncoderSetPipeline(pass, pipeline_);
wgpuRenderPassEncoderSetBindGroup(pass, 0, bind_group_0_, 0, nullptr);
wgpuRenderPassEncoderSetBindGroup(pass, 1, bind_group_1_, 0, nullptr);
wgpuRenderPassEncoderDraw(pass, 36, 1, 0, 0);
}
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