mirror of
https://bitbucket.org/s_l_teichmann/mtsatellite
synced 2024-11-08 11:10:27 +01:00
133 lines
2.7 KiB
Go
133 lines
2.7 KiB
Go
// Copyright 2014 by Sascha L. Teichmann
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// Use of this source code is governed by the MIT license
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// that can be found in the LICENSE file.
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package common
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import (
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"fmt"
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"image/color"
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"log"
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"path/filepath"
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"strconv"
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)
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const (
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tileWidth = 18
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tileHeight = 18
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yOrderCapacity = 512
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)
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// To scan the whole height in terms of the y coordinate
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// the database is queried in height units defined in the tileDepths table.
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var tileDepths = [...][2]int16{
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{1024, 1934},
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{256, 1023},
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{128, 255},
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{64, 127},
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{32, 63},
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{16, 31},
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{8, 15},
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{4, 7},
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{2, 3},
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{0, 1},
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{-1, 0},
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{-4, -2},
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{-8, -5},
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{-16, -9},
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{-32, -17},
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{-64, -33},
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{-128, -65},
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{-256, -129},
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{-1024, -257},
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{-1934, -1025}}
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type BaseTileCreator struct {
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client *RedisClient
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colors *Colors
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renderer *Renderer
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yOrder *YOrder
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baseDir string
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update bool
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}
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func NewBaseTileCreator(
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client *RedisClient,
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colors *Colors,
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baseDir string,
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update bool) *BaseTileCreator {
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renderer := NewRenderer(tileWidth, tileHeight)
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return &BaseTileCreator{
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client: client,
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colors: colors,
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renderer: renderer,
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yOrder: NewYOrder(renderer, yOrderCapacity),
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baseDir: baseDir,
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update: update}
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}
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func (btc *BaseTileCreator) Close() error {
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return btc.client.Close()
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}
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func (btc *BaseTileCreator) CreateTile(x, z int16, i, j int) error {
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btc.renderer.Reset()
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btc.renderer.SetPos(x, z)
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btc.yOrder.Reset()
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drawBlock := func(block *Block) {
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if err := btc.yOrder.RenderBlock(block, btc.colors); err != nil {
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log.Printf("WARN: rendering block failed: %s", err)
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}
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}
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var c1, c2 Coord
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nareas := make([]Area, 0, tileWidth*tileHeight/2)
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oareas := make([]Area, 1, tileWidth*tileHeight/2)
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oareas[0] = Area{
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X1: 0, Z1: 0,
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X2: int16(tileWidth) - 1, Z2: int16(tileHeight) - 1}
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for _, yRange := range tileDepths {
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c1.Y = yRange[0]
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c2.Y = yRange[1]
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nareas = btc.renderer.UncoveredAreas(nareas, oareas)
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if len(nareas) == 0 {
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break
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}
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for _, area := range nareas {
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c1.X = area.X1 + x
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c1.Z = area.Z1 + z
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c2.X = area.X2 + x
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c2.Z = area.Z2 + z
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query := Cuboid{P1: c1, P2: c2}
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if err := btc.client.QueryCuboid(query, drawBlock); err != nil {
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return err
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}
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if err := btc.yOrder.Drain(btc.colors); err != nil {
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log.Printf("WARN: rendering block failed: %s", err)
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}
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}
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oareas, nareas = nareas, oareas[0:0]
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}
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image := btc.renderer.CreateShadedImage(
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16, 16, (tileWidth-2)*16, (tileHeight-2)*16,
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btc.colors.Colors, color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
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path := filepath.Join(btc.baseDir, strconv.Itoa(i), fmt.Sprintf("%d.png", j))
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log.Printf("Writing (%d, %d) to file %s", x, z, path)
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if !btc.update {
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return SaveAsPNG(path, image)
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}
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return SaveAsPNGAtomic(path, image)
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}
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