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sumi
2025-12-21 18:16:05 -06:00
parent deb020b5c8
commit 63fa362060
2 changed files with 86 additions and 98 deletions
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122
sketch.go
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@@ -1,7 +1,7 @@
package main
import (
"fmt"
"math"
"github.com/gen2brain/raylib-go/raylib"
)
@@ -10,36 +10,17 @@ type Sketch struct {
}
func NewSketch() Sketch {
return Sketch {
return Sketch{
layerTools: make(map[string]LayerTools),
}
}
func (s *Sketch) CreateLayer(name string, layer Layer, sourceWidth int32, sourceHeight int32) {
texture := rl.LoadRenderTexture(sourceWidth, sourceHeight)
s.layerTools[name] = LayerTools {
name: name,
s.layerTools[name] = LayerTools{
name: name,
texture: &texture,
layer: layer,
}
}
func LayerViewRect(ctx *RenderCtx) rl.Rectangle {
z := ctx.Cam.Zoom
// get the viewport width in texture space
viewportWidth := float32(ctx.TargetWidth) / z
viewportHeight := float32(ctx.TargetHeight) / z
x := rl.Clamp(ctx.Cam.Target.X - viewportWidth/2, 0, float32(ctx.SourceWidth) - viewportWidth/2.0)
y := rl.Clamp(ctx.Cam.Target.Y - viewportHeight/2, 0, float32(ctx.SourceHeight) - viewportHeight/2.0)
return rl.Rectangle{
X: x,
Y: y,
Width: viewportWidth,
Height: viewportHeight,
layer: layer,
}
}
@@ -52,36 +33,68 @@ func (s *Sketch) Draw(ctx *RenderCtx) {
layer.Draw(ctx)
rl.EndTextureMode()
}
// composite all layers to screen
//ClampCameraToLayer(ctx)
//view := LayerViewRect(ctx)
src := rl.Rectangle {
X: 0,
Y: 0,
Width: float32(ctx.SourceWidth),
Height: -float32(ctx.SourceHeight),
}
dst := rl.Rectangle {
X: 0,
Y: 0,
Width: float32(ctx.TargetWidth),
screen := rl.Rectangle {
X: 0,
Y: 0,
Width: float32(ctx.TargetWidth),
Height: float32(ctx.TargetHeight),
}
fmt.Printf("src = %v, dst %v\n", src, dst)
viewport := s.CalcViewport(ctx)
for _, instance := range s.layerTools {
rl.DrawTexturePro(instance.texture.Texture, src, dst, rl.Vector2{}, 0, rl.White)
rl.DrawTexturePro(instance.texture.Texture, viewport, screen, rl.Vector2{}, 0, rl.White)
}
}
func (s *Sketch) CalcViewport(ctx *RenderCtx) rl.Rectangle {
viewportWidth := rl.Clamp(float32(ctx.SourceWidth) / ctx.Cam.Zoom, 0, float32(ctx.SourceWidth))
viewportHeight := rl.Clamp(float32(ctx.SourceHeight) / ctx.Cam.Zoom, 0, float32(ctx.SourceHeight))
return rl.Rectangle{
X: rl.Clamp(ctx.Cam.LookAt.X - viewportWidth/2.0, 0, float32(ctx.SourceWidth)-viewportWidth),
Y: rl.Clamp(ctx.Cam.LookAt.Y - viewportHeight/2.0, 0, float32(ctx.SourceHeight)-viewportHeight),
Width: float32(viewportWidth),
Height: -float32(viewportHeight),
}
}
func (s *Sketch) Update(ctx *RenderCtx) {
if rl.IsMouseButtonDown(rl.MouseRightButton) {
// get mouse delta from last frame
delta := rl.GetMouseDelta()
// compute the amount to move scaled by the camera zoom
delta = rl.Vector2Scale(delta, -sourceScale/ctx.Cam.Zoom)
delta.Y = -delta.Y
ctx.Cam.LookAt = rl.Vector2Add(ctx.Cam.LookAt, delta)
}
// clamp LookAt to be somewhere on the texture
ctx.Cam.LookAt.X = rl.Clamp(ctx.Cam.LookAt.X, 0, float32(ctx.SourceWidth-1))
ctx.Cam.LookAt.Y = rl.Clamp(ctx.Cam.LookAt.Y, 0, float32(ctx.SourceHeight-1))
// Zoom based on mouse wheel
wheel := rl.GetMouseWheelMove()
if wheel != 0 {
const zoomIncrement float32 = 0.05
if wheel > 0 {
ctx.Cam.Zoom *= 1+zoomIncrement
} else {
ctx.Cam.Zoom *= 1-zoomIncrement
}
}
// clamp zoom to > 1 so we don't ever zoom out more than necessary
ctx.Cam.Zoom = rl.Clamp(ctx.Cam.Zoom, 1, math.MaxInt64)
}
type LayerTools struct {
name string
layer Layer
name string
layer Layer
texture *rl.RenderTexture2D
}
@@ -91,7 +104,7 @@ type Layer interface {
Draw(ctx *RenderCtx)
}
type TestPattern struct { }
type TestPattern struct{}
func DrawGrid(spacing int32, halfExtent int32) {
col := rl.Color{R: 220, G: 220, B: 220, A: 255}
@@ -107,13 +120,13 @@ func DrawGrid(spacing int32, halfExtent int32) {
func (tp *TestPattern) Draw(ctx *RenderCtx) {
rl.ClearBackground(rl.Black)
centerX := float32(ctx.SourceWidth)/2
centerY := float32(ctx.SourceHeight)/2
centerX := float32(ctx.SourceWidth) / 2
centerY := float32(ctx.SourceHeight) / 2
rl.DrawRectangleRec(rl.Rectangle { X: 0, Y: 0, Width: centerX, Height: centerY }, rl.Red)
rl.DrawRectangleRec(rl.Rectangle { X: centerX, Y: 0, Width: centerX, Height: centerY }, rl.Green)
rl.DrawRectangleRec(rl.Rectangle { X: 0, Y: centerY, Width: centerX, Height: centerY }, rl.Blue)
rl.DrawRectangleRec(rl.Rectangle { X: centerX, Y: centerY, Width: centerX, Height: centerY }, rl.White)
rl.DrawRectangleRec(rl.Rectangle{X: 0, Y: 0, Width: centerX, Height: centerY}, rl.Red)
rl.DrawRectangleRec(rl.Rectangle{X: centerX, Y: 0, Width: centerX, Height: centerY}, rl.Green)
rl.DrawRectangleRec(rl.Rectangle{X: 0, Y: centerY, Width: centerX, Height: centerY}, rl.Blue)
rl.DrawRectangleRec(rl.Rectangle{X: centerX, Y: centerY, Width: centerX, Height: centerY}, rl.White)
rl.DrawLine(0, 0, ctx.SourceWidth, ctx.SourceHeight, rl.Black)
@@ -126,7 +139,6 @@ func (tp *TestPattern) Draw(ctx *RenderCtx) {
rl.PopMatrix()
}
/** Ports **/
type Ports map[string]Signal
@@ -151,9 +163,9 @@ func (p Ports) Eval(t float64) map[string]float64 {
type RenderCtx struct {
TargetWidth int32
TargetHeight int32
SourceWidth int32
SourceWidth int32
SourceHeight int32
Time float64
Ports map[string]float64
Cam rl.Camera2D
Time float64
Ports map[string]float64
Cam *TextureCam
}