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Render loop with two passes (#179)

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* Render in two passes
To avoid drawing over objects.
* Apply optimization suggestions
* Less pointers
* Also call GenTiles in GenerateMap, oops.
This commit is contained in:
Ziemas 2019-11-15 17:03:58 +01:00 committed by Tim Sarbin
parent a9cb2914b7
commit 8ce6da1f6e
1 changed files with 65 additions and 24 deletions
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89
d2render/d2mapengine/engine.go
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@ -21,9 +21,15 @@ import (
"github.com/hajimehoshi/ebiten/ebitenutil"
)
type RegionTile struct {
tileX, tileY int // tile coordinates
offX, offY int // world space coordinates of tile origin
}
type EngineRegion struct {
Rect d2common.Rectangle
Region *Region
Tiles []RegionTile
}
type Engine struct {
@ -53,6 +59,10 @@ func (v *Engine) GenerateMap(regionType d2enum.RegionIdType, levelPreset int) {
Rect: d2common.Rectangle{0, 0, int(region.TileWidth), int(region.TileHeight)},
Region: region,
})
for i, _ := range v.regions {
v.GenTiles(&v.regions[i])
}
}
func (v *Engine) GenerateAct1Overworld() {
@ -77,6 +87,10 @@ func (v *Engine) GenerateAct1Overworld() {
})
}
for i, _ := range v.regions {
v.GenTiles(&v.regions[i])
}
sx, sy := d2helper.IsoToScreen(int(region.StartX), int(region.StartY), 0, 0)
v.OffsetX = float64(sx) - 400
v.OffsetY = float64(sy) - 300
@ -101,41 +115,45 @@ func (v *Engine) Render(target *ebiten.Image) {
}
}
func (v *Engine) RenderRegion(region EngineRegion, target *ebiten.Image) {
func (v *Engine) GenTiles(region *EngineRegion) {
for y := 0; y < int(region.Region.TileHeight); y++ {
offX := -((y + region.Rect.Top) * 80) + (region.Rect.Left * 80)
offY := ((y + region.Rect.Top) * 40) + (region.Rect.Left * 40)
for x := 0; x < int(region.Region.TileWidth); x++ {
sx, sy := d2helper.IsoToScreen(x+region.Rect.Left, y+region.Rect.Top, int(v.OffsetX), int(v.OffsetY))
if sx > -160 && sy > -160 && sx <= 880 && sy <= 1000 {
v.RenderTile(region.Region, offX, offY, x, y, target)
}
region.Tiles = append(region.Tiles, RegionTile{
tileX: x,
tileY: y,
offX: offX,
offY: offY,
})
offX += 80
offY += 40
}
}
}
func (v *Engine) RenderTile(region *Region, offX, offY, x, y int, target *ebiten.Image) {
func (v *Engine) RenderRegion(region EngineRegion, target *ebiten.Image) {
tilesToRender := make([]RegionTile, len(region.Tiles))
for i, tile := range region.Tiles {
sx, sy := d2helper.IsoToScreen(tile.tileX+region.Rect.Left, tile.tileY+region.Rect.Top, int(v.OffsetX), int(v.OffsetY))
if sx > -160 && sy > -160 && sx <= 880 && sy <= 1000 {
tilesToRender[i] = tile
}
}
for _, tile := range tilesToRender {
v.RenderTile(region.Region, tile.offX, tile.offY, tile.tileX, tile.tileY, target)
}
for _, tile := range tilesToRender {
v.RenderTileObjects(region.Region, tile.offX, tile.offY, tile.tileX, tile.tileY, target)
}
}
func (v *Engine) RenderTileObjects(region *Region, offX, offY, x, y int, target *ebiten.Image) {
tile := region.DS1.Tiles[y][x]
for i := range tile.Floors {
if tile.Floors[i].Hidden || tile.Floors[i].Prop1 == 0 {
continue
}
region.RenderTile(offX+int(v.OffsetX), offY+int(v.OffsetY), x, y, d2enum.RegionLayerTypeFloors, i, target)
}
for i := range tile.Shadows {
if tile.Shadows[i].Hidden || tile.Shadows[i].Prop1 == 0 {
continue
}
region.RenderTile(offX+int(v.OffsetX), offY+int(v.OffsetY), x, y, d2enum.RegionLayerTypeShadows, i, target)
}
for i := range tile.Walls {
if tile.Walls[i].Hidden || tile.Walls[i].Orientation == 15 || tile.Walls[i].Orientation == 10 || tile.Walls[i].Orientation == 11 || tile.Walls[i].Orientation == 0 {
continue
}
region.RenderTile(offX+int(v.OffsetX), offY+int(v.OffsetY), x, y, d2enum.RegionLayerTypeWalls, i, target)
}
for _, obj := range region.AnimationEntities {
if int(math.Floor(obj.LocationX)) == x && int(math.Floor(obj.LocationY)) == y {
obj.Render(target, offX+int(v.OffsetX), offY+int(v.OffsetY))
@ -175,3 +193,26 @@ func (v *Engine) RenderTile(region *Region, offX, offY, x, y int, target *ebiten
}
}
}
func (v *Engine) RenderTile(region *Region, offX, offY, x, y int, target *ebiten.Image) {
tile := region.DS1.Tiles[y][x]
for i := range tile.Floors {
if tile.Floors[i].Hidden || tile.Floors[i].Prop1 == 0 {
continue
}
region.RenderTile(offX+int(v.OffsetX), offY+int(v.OffsetY), x, y, d2enum.RegionLayerTypeFloors, i, target)
}
for i := range tile.Shadows {
if tile.Shadows[i].Hidden || tile.Shadows[i].Prop1 == 0 {
continue
}
region.RenderTile(offX+int(v.OffsetX), offY+int(v.OffsetY), x, y, d2enum.RegionLayerTypeShadows, i, target)
}
for i := range tile.Walls {
if tile.Walls[i].Hidden || tile.Walls[i].Orientation == 15 || tile.Walls[i].Orientation == 10 || tile.Walls[i].Orientation == 11 || tile.Walls[i].Orientation == 0 {
continue
}
region.RenderTile(offX+int(v.OffsetX), offY+int(v.OffsetY), x, y, d2enum.RegionLayerTypeWalls, i, target)
}
}