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Better early stopping when the tile is filled.

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This commit is contained in:
Sascha L. Teichmann
2014-09-11 02:28:09 +02:00
parent e2070c8b94
commit 072eba3e5a
2 changed files with 29 additions and 22 deletions
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42
tilemapper/renderer.go
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@ -13,15 +13,14 @@ import (
)
type Renderer struct {
width int
height int
xOfs int16
zOfs int16
yBuffer []int32
cBuffer []int32
filled []uint16
minYs []int16
RejectedBlocks int
width int
height int
xOfs int16
zOfs int16
yBuffer []int32
cBuffer []int32
filled int
Rejected int
}
func NewRenderer(xOfs, zOfs int16, width, height int) (renderer *Renderer) {
@ -45,11 +44,10 @@ func NewRenderer(xOfs, zOfs int16, width, height int) (renderer *Renderer) {
return
}
func (r *Renderer) minY(x, z int16) (minY int32) {
x -= r.xOfs
z -= r.zOfs
w := r.width << 4
ofs := int(z)*w<<4 + int(x)<<4
//func (r *Renderer) minY(x, z int16) (minY int32) {
func (r *Renderer) minY(ofs, w int) (minY int32) {
//w := r.width << 4
//ofs := int(z)*w<<4 + int(x)<<4
minY = int32(math.MaxInt32)
for yEnd := ofs + w<<4; ofs < yEnd; {
for xEnd := ofs + 16; ofs < xEnd; ofs++ {
@ -63,15 +61,21 @@ func (r *Renderer) minY(x, z int16) (minY int32) {
return
}
func (r *Renderer) IsFilled() bool {
return r.filled == r.width<<4*r.height<<4
}
func (r *Renderer) RenderBlock(block *common.Block, nameIndex map[string]int32) (err error) {
bx := block.Coord.X - r.xOfs
bz := block.Coord.Z - r.zOfs
// We do not need to render the block if the whole 16x16 area
// is already filled and the block is strictly below.
w := r.width << 4
ofs := int(bz)*w<<4 + int(bx)<<4
blockY := int32(block.Coord.Y) << 4
if blockY < r.minY(block.Coord.X, block.Coord.Z) {
r.RejectedBlocks++
if blockY < r.minY(ofs, w) {
r.Rejected++
return
}
@ -81,14 +85,14 @@ func (r *Renderer) RenderBlock(block *common.Block, nameIndex map[string]int32)
return
}
w := r.width << 4
ofs := int(bz)*w<<4 + int(bx)<<4
for z := 0; z < 16; z++ {
for x := 0; x < 16; x++ {
if currentY := r.yBuffer[ofs]; currentY < blockY {
for y := 15; y >= 0; y-- {
if c, ok := db.Content(x, y, z); ok {
if r.cBuffer[ofs] == -1 {
r.filled++
}
r.cBuffer[ofs] = c
r.yBuffer[ofs] = blockY + int32(y)
break