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// This file is part of the 64k demo project.
// It implements RotatingCubeEffectV2 (simplified v2 port).
#include "effects/rotating_cube_effect_v2.h"
#include "gpu/bind_group_builder.h"
#include "gpu/gpu.h"
#include "gpu/shaders.h"
RotatingCubeEffectV2::RotatingCubeEffectV2(const GpuContext& ctx,
const std::vector<std::string>& inputs,
const std::vector<std::string>& outputs)
: EffectV2(ctx, inputs, outputs), depth_node_(outputs[0] + "_depth") {
// Create uniform buffers
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);
// Create bind group layout
WGPUBindGroupLayout bgl =
BindGroupLayoutBuilder()
.uniform(0, WGPUShaderStage_Vertex | WGPUShaderStage_Fragment,
sizeof(Uniforms))
.storage(1, WGPUShaderStage_Vertex | WGPUShaderStage_Fragment,
sizeof(ObjectData))
.build(ctx_.device);
const WGPUBindGroupLayout bgls[] = {bgl};
const WGPUPipelineLayoutDescriptor pl_desc = {
.bindGroupLayoutCount = 1,
.bindGroupLayouts = bgls,
};
WGPUPipelineLayout pipeline_layout =
wgpuDeviceCreatePipelineLayout(ctx_.device, &pl_desc);
// Load shader (TODO: create rotating_cube_v2.wgsl)
WGPUShaderSourceWGSL wgsl_src = {};
wgsl_src.chain.sType = WGPUSType_ShaderSourceWGSL;
wgsl_src.code = str_view(rotating_cube_v2_wgsl);
WGPUShaderModuleDescriptor shader_desc = {};
shader_desc.nextInChain = &wgsl_src.chain;
WGPUShaderModule shader_module =
wgpuDeviceCreateShaderModule(ctx_.device, &shader_desc);
const WGPUColorTargetState color_target = {
.format = WGPUTextureFormat_RGBA8Unorm,
.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.layout = pipeline_layout;
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_Back;
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);
wgpuPipelineLayoutRelease(pipeline_layout);
// Create bind group
const WGPUBindGroupEntry entries[] = {
{.binding = 0,
.buffer = uniform_buffer_.buffer,
.size = sizeof(Uniforms)},
{.binding = 1,
.buffer = object_buffer_.buffer,
.size = sizeof(ObjectData)},
};
const WGPUBindGroupDescriptor bg_desc = {
.layout = bgl,
.entryCount = 2,
.entries = entries,
};
bind_group_ = wgpuDeviceCreateBindGroup(ctx_.device, &bg_desc);
wgpuBindGroupLayoutRelease(bgl);
}
RotatingCubeEffectV2::~RotatingCubeEffectV2() {
if (bind_group_)
wgpuBindGroupRelease(bind_group_);
if (pipeline_)
wgpuRenderPipelineRelease(pipeline_);
}
void RotatingCubeEffectV2::declare_nodes(NodeRegistry& registry) {
// Declare depth buffer node
registry.declare_node(depth_node_, NodeType::DEPTH24, -1, -1);
}
void RotatingCubeEffectV2::render(WGPUCommandEncoder encoder,
const UniformsSequenceParams& params,
NodeRegistry& nodes) {
rotation_ += 0.016f * 1.5f;
// Camera setup
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, params.aspect_ratio, 0.1f, 100.0f);
const mat4 view_proj = proj * view;
// Cube transform
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;
// Update uniforms
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, params.time),
.params = vec4(1.0f, 0.0f, 0.0f, 0.0f),
.resolution = params.resolution,
.aspect_ratio = params.aspect_ratio,
};
const ObjectData obj_data = {
.model = model,
.inv_model = model.inverse(),
.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));
// Get output views
WGPUTextureView color_view = nodes.get_view(output_nodes_[0]);
WGPUTextureView depth_view = nodes.get_view(depth_node_);
// Render pass with depth
WGPURenderPassColorAttachment color_attachment = {
.view = color_view,
#if !defined(DEMO_CROSS_COMPILE_WIN32)
.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED,
#endif
.loadOp = WGPULoadOp_Clear,
.storeOp = WGPUStoreOp_Store,
.clearValue = {0.0, 0.0, 0.0, 1.0}};
WGPURenderPassDepthStencilAttachment depth_attachment = {
.view = depth_view,
.depthLoadOp = WGPULoadOp_Clear,
.depthStoreOp = WGPUStoreOp_Discard,
.depthClearValue = 1.0f};
WGPURenderPassDescriptor pass_desc = {
.colorAttachmentCount = 1,
.colorAttachments = &color_attachment,
.depthStencilAttachment = &depth_attachment};
WGPURenderPassEncoder pass = wgpuCommandEncoderBeginRenderPass(encoder, &pass_desc);
wgpuRenderPassEncoderSetPipeline(pass, pipeline_);
wgpuRenderPassEncoderSetBindGroup(pass, 0, bind_group_, 0, nullptr);
wgpuRenderPassEncoderDraw(pass, 36, 1, 0, 0); // 36 vertices for cube
wgpuRenderPassEncoderEnd(pass);
wgpuRenderPassEncoderRelease(pass);
}
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