mirror of
https://bitbucket.org/s_l_teichmann/mtsatellite
synced 2024-11-17 23:58:17 +01:00
84 lines
1.6 KiB
Go
84 lines
1.6 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 main
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import (
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"math"
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"bitbucket.org/s_l_teichmann/mtredisalize/common"
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)
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type Renderer struct {
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width int
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height int
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xOfs int16
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zOfs int16
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yBuffer []int32
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cBuffer []int32
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filled []byte
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minYs []int16
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}
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func NewRenderer(xOfs, zOfs int16, width, height int) (renderer *Renderer) {
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dim := width * height
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pixSize := dim * 16 * 16
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yBuffer := make([]int32, pixSize)
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cBuffer := make([]int32, pixSize)
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filled := make([]byte, dim)
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minYs := make([]int16, dim)
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for i := 0; i < pixSize; i++ {
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yBuffer[i] = math.MinInt32
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cBuffer[i] = -1
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}
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for i := 0; i < dim; i++ {
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minYs[i] = math.MinInt16
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}
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renderer = &Renderer{
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width: width,
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height: height,
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xOfs: xOfs,
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zOfs: zOfs,
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yBuffer: yBuffer,
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cBuffer: cBuffer,
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filled: filled,
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minYs: minYs}
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return
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}
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func (r *Renderer) RenderBlock(coord common.Coord, data []byte, nameIndex map[string]int) (err error) {
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x := coord.X + r.xOfs
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z := coord.Z + r.zOfs
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dimIndex := (x << 4) + z
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// We do not need to render the block if the whole 16x16 area
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// is already filled and the block is strictly below.
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if r.filled[dimIndex] == 0xff && r.minYs[dimIndex] > coord.Y {
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return
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}
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var db *DecodedBlock
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if db, err = NewDecodedBlock(data, nameIndex); err != nil {
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return
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}
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_ = db
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ay := int32(coord.Y) << 4
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_ = ay
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for x := 0; x < 16; x++ {
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for z := 0; z < 16; z++ {
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for y := 15; y >= 0; y-- {
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_, _, _ = x, y, z
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}
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}
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}
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return
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}
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