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examples: use default values, gpu helper APIs

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2022-08-17 01:42:27 -07:00
parent 7227e9a13f
commit edc3b5d60e
11 changed files with 251 additions and 630 deletions
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57
examples/boids/main.zig
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@ -27,19 +27,15 @@ var sim_params = [_]f32{
};
pub fn init(app: *App, core: *mach.Core) !void {
const sprite_shader_module = core.device.createShaderModule(&.{
.next_in_chain = .{ .wgsl_descriptor = &.{
.source = @embedFile("sprite.wgsl"),
} },
.label = "sprite shader module",
});
const sprite_shader_module = core.device.createShaderModuleWGSL(
"sprite.wgsl",
@embedFile("sprite.wgsl"),
);
const update_sprite_shader_module = core.device.createShaderModule(&.{
.next_in_chain = .{ .wgsl_descriptor = &.{
.source = @embedFile("updateSprites.wgsl"),
} },
.label = "update sprite shader module",
});
const update_sprite_shader_module = core.device.createShaderModuleWGSL(
"updateSprites.wgsl",
@embedFile("updateSprites.wgsl"),
);
const instanced_particles_attributes = [_]gpu.VertexAttribute{
.{
@ -66,35 +62,31 @@ pub fn init(app: *App, core: *mach.Core) !void {
};
const render_pipeline = core.device.createRenderPipeline(&gpu.RenderPipeline.Descriptor{
.vertex = .{
.vertex = gpu.VertexState.init(.{
.module = sprite_shader_module,
.entry_point = "vert_main",
.buffer_count = 2,
.buffers = &[_]gpu.VertexBufferLayout{
.{
.buffers = &.{
gpu.VertexBufferLayout.init(.{
// instanced particles buffer
.array_stride = 4 * 4,
.step_mode = .instance,
.attribute_count = instanced_particles_attributes.len,
.attributes = &instanced_particles_attributes,
},
.{
}),
gpu.VertexBufferLayout.init(.{
// vertex buffer
.array_stride = 2 * 4,
.step_mode = .vertex,
.attribute_count = vertex_buffer_attributes.len,
.attributes = &vertex_buffer_attributes,
},
}),
},
},
.fragment = &gpu.FragmentState{
}),
.fragment = &gpu.FragmentState.init(.{
.module = sprite_shader_module,
.entry_point = "frag_main",
.target_count = 1,
.targets = &[_]gpu.ColorTargetState{.{
.format = core.swap_chain_format,
}},
},
}),
});
const compute_pipeline = core.device.createComputePipeline(&gpu.ComputePipeline.Descriptor{ .compute = gpu.ProgrammableStageDescriptor{
@ -155,15 +147,14 @@ pub fn init(app: *App, core: *mach.Core) !void {
i = 0;
while (i < 2) : (i += 1) {
particle_bind_groups[i] = core.device.createBindGroup(&gpu.BindGroup.Descriptor{
particle_bind_groups[i] = core.device.createBindGroup(&gpu.BindGroup.Descriptor.init(.{
.layout = compute_pipeline.getBindGroupLayout(0),
.entry_count = 3,
.entries = &[_]gpu.BindGroup.Entry{
.entries = &.{
gpu.BindGroup.Entry.buffer(0, sim_param_buffer, 0, sim_params.len * @sizeOf(f32)),
gpu.BindGroup.Entry.buffer(1, particle_buffers[i], 0, initial_particle_data.len * @sizeOf(f32)),
gpu.BindGroup.Entry.buffer(2, particle_buffers[(i + 1) % 2], 0, initial_particle_data.len * @sizeOf(f32)),
},
});
}));
}
app.compute_pipeline = compute_pipeline;
@ -181,18 +172,16 @@ pub fn update(app: *App, core: *mach.Core) !void {
const back_buffer_view = core.swap_chain.?.getCurrentTextureView();
const color_attachment = gpu.RenderPassColorAttachment{
.view = back_buffer_view,
.resolve_target = null,
.clear_value = std.mem.zeroes(gpu.Color),
.load_op = .clear,
.store_op = .store,
};
const render_pass_descriptor = gpu.RenderPassDescriptor{
.color_attachment_count = 1,
.color_attachments = &[_]gpu.RenderPassColorAttachment{
const render_pass_descriptor = gpu.RenderPassDescriptor.init(.{
.color_attachments = &.{
color_attachment,
},
};
});
sim_params[0] = @floatCast(f32, core.delta_time);
core.device.getQueue().writeBuffer(app.sim_param_buffer, 0, sim_params[0..]);