automated snapshot

contour_layer.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"math"
 	"math/rand"
 	"github.com/gen2brain/raylib-go/raylib"
@@ -8,21 +9,27 @@ import (
 
 type ContourLayer struct {
 	field  Field
+	maxActors uint32
 	actors []*Actor
+	actorIndex uint32
 	rng    *rand.Rand
 }
 
 func NewContourLayer(sketch *Sketch, rng *rand.Rand, field Field) *ContourLayer {
 
-	actors := make([]*Actor, 0)
+	maxActors := 200000
+
+	actors := make([]*Actor, maxActors)
 
 	layer := ContourLayer {
 		rng: rng,
 		field: field,
 		actors: actors,
+		maxActors: uint32(maxActors),
+		actorIndex: 0,
 	}
 
-	layer.AddActors(1, sketch.sourceWidth, sketch.sourceHeight)
+	//layer.AddActors(1, sketch.sourceWidth, sketch.sourceHeight)
 
 	return &layer
 }
@@ -38,18 +45,22 @@ func (s *ContourLayer) AddActors(n, sourceWidth, sourceHeight int32) {
 				stepSize: 1,
 				color:    rl.NewColor(11, 35, 176, 50),
 			}
-		s.actors = append(s.actors, newActor)
+		s.actors[s.actorIndex] = newActor
+		s.actorIndex = (s.actorIndex + 1) % s.maxActors
 	}
 }
 
 func (s *ContourLayer) Update(ctx *RenderCtx) {
 	s.AddActors(100, ctx.SourceWidth, ctx.SourceHeight)
+	fmt.Printf("num actors = %d\n", len(s.actors))
 }
 
 func (s *ContourLayer) Draw(ctx *RenderCtx) {
 	rl.BeginBlendMode(rl.BlendAdditive)
 	for _, actor := range s.actors {
-		actor.Draw()
+		if actor != nil {
+			actor.Draw()
+		}
 	}
 	rl.EndBlendMode()
 }