101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
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package graph
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import (
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"errors"
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"github.com/vkngwrapper/core/v2/core1_0"
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"zworld/engine/object"
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"zworld/engine/object/camera"
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"zworld/engine/renderapi"
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"zworld/engine/renderapi/color"
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"zworld/engine/renderapi/command"
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"zworld/engine/renderapi/swapchain"
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"zworld/engine/renderapi/vulkan"
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"zworld/plugins/math/mat4"
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)
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var ErrRecreate = errors.New("recreate renderer")
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type PreDrawable interface {
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object.Component
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PreDraw(renderapi.Args, object.Object) error
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}
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type preNode struct {
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*node
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target vulkan.Target
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cameraQuery *object.Query[*camera.Camera]
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predrawQuery *object.Query[PreDrawable]
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}
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func newPreNode(app vulkan.App, target vulkan.Target) *preNode {
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return &preNode{
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node: newNode(app, "Pre", nil),
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target: target,
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cameraQuery: object.NewQuery[*camera.Camera](),
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predrawQuery: object.NewQuery[PreDrawable](),
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}
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}
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func (n *preNode) Prepare(scene object.Object, time, delta float32) (*renderapi.Args, *swapchain.Context, error) {
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screen := renderapi.Screen{
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Width: n.target.Width(),
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Height: n.target.Height(),
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Scale: n.target.Scale(),
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}
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// aquire next frame
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context, err := n.target.Aquire()
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if err != nil {
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return nil, nil, ErrRecreate
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}
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// ensure the default white texture is always available
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n.app.Textures().Fetch(color.White)
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// cache ticks
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n.app.Meshes().Tick()
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n.app.Textures().Tick()
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// create render arguments
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args := renderapi.Args{}
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// find the first active camera
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if camera, exists := n.cameraQuery.Reset().First(scene); exists {
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args = camera.RenderArgs(screen)
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} else {
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args.Viewport = screen
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}
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// fill in time & swapchain context
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args.Frame = context.Index
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args.Time = time
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args.Delta = delta
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args.Transform = mat4.Ident()
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// execute pre-draw pass
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objects := n.predrawQuery.Reset().Collect(scene)
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for _, object := range objects {
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object.PreDraw(args.Apply(object.Transform().Matrix()), scene)
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}
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// fire off render start signals
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var waits []command.Wait
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if context.ImageAvailable != nil {
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waits = []command.Wait{
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{
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Semaphore: context.ImageAvailable,
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Mask: core1_0.PipelineStageColorAttachmentOutput,
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},
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}
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}
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worker := n.app.Worker(context.Index)
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worker.Submit(command.SubmitInfo{
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Marker: n.Name(),
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Wait: waits,
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Signal: n.signals(context.Index),
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})
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return &args, context, nil
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}
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