place blocks

internal/world/chunk.go

@@ -4,6 +4,8 @@ import (
 	"encoding/gob"
 	"io"
 	"log"
+
+	"edgaru089.ml/go/gl01/internal/util/itype"
 )
 
 const (
@@ -40,6 +42,27 @@ func (c *Chunk) SetBlock(x, y, z int, id, aux int) {
 	c.Id[x][y][z] = uint16(id)
 	c.Aux[x][y][z] = uint16(aux)
 	c.renderChanged = true
+
+	switch x {
+	case 0:
+		if cb, ok := c.world.Chunks[itype.Vec2i{c.X - 1, c.Z}]; ok {
+			cb.InvalidateRender()
+		}
+	case ChunkSizeX - 1:
+		if cb, ok := c.world.Chunks[itype.Vec2i{c.X + 1, c.Z}]; ok {
+			cb.InvalidateRender()
+		}
+	}
+	switch z {
+	case 0:
+		if cb, ok := c.world.Chunks[itype.Vec2i{c.X, c.Z - 1}]; ok {
+			cb.InvalidateRender()
+		}
+	case ChunkSizeZ - 1:
+		if cb, ok := c.world.Chunks[itype.Vec2i{c.X, c.Z + 1}]; ok {
+			cb.InvalidateRender()
+		}
+	}
 }
 
 // InvalidateRender should be called if a block inside the chunk has changed