Collect more statistics about number of solid and transparent blocks and print them in mttilemapper.

cmd/mttilemapper/main.go

@@ -117,5 +117,7 @@ func main() {
 	}
 
 	log.Printf("num blocks: %d\n", numBlocks)
-	log.Printf("rejected blocks: %d\n", renderer.Rejected)
+	log.Printf("rejected blocks: %d\n", renderer.RejectedBlocks)
+	log.Printf("transparent blocks: %d\n", renderer.TransparentBlocks)
+	log.Printf("solid blocks: %d\n", renderer.SolidBlocks)
 }

common/renderer.go

@@ -17,14 +17,16 @@ type Area struct {
 }
 
 type Renderer struct {
-	width    int
-	height   int
-	xOfs     int16
-	zOfs     int16
-	yBuffer  []int32
-	yMin     []int32
-	cBuffer  []int32
-	Rejected int
+	width             int
+	height            int
+	xOfs              int16
+	zOfs              int16
+	yBuffer           []int32
+	yMin              []int32
+	cBuffer           []int32
+	RejectedBlocks    int
+	SolidBlocks       int
+	TransparentBlocks int
 }
 
 type YOrder struct {
@@ -172,7 +174,7 @@ func (r *Renderer) RenderBlock(block *Block, colors *Colors) (err error) {
 	blockY := int32(block.Coord.Y) << 4
 	pos := int(bz)*r.width + int(bx)
 	if blockY < r.yMin[pos] {
-		r.Rejected++
+		r.RejectedBlocks++
 		return
 	}
 
@@ -183,10 +185,16 @@ func (r *Renderer) RenderBlock(block *Block, colors *Colors) (err error) {
 	}
 
 	if db.AirOnly {
-		r.Rejected++
+		r.RejectedBlocks++
 		return
 	}
 
+	if db.Transparent {
+		r.TransparentBlocks++
+	} else {
+		r.SolidBlocks++
+	}
+
 	w := r.width << 4
 	ofs := int(bz)*w<<4 + int(bx)<<4
 	yB := r.yBuffer