68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package gamemap
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import (
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"encoding/json"
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"fmt"
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"math"
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)
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// WorldMap is the data structure used game world
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type WorldMap struct {
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data [256][256]int
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max_x int
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max_y int
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}
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// GetTile method is used to grab a tile value with error checking
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func (m WorldMap) GetTile(x int, y int) (int, error) {
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if x > m.max_x || y > m.max_y || x < 0 || y < 0 {
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return -1, fmt.Errorf("Map out of bounds error: %d, %d", x, y)
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}
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return m.data[x][y], nil
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}
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// GetJSONRegion method returns a JSON object containing the tile values of everything
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// within a given range
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func (m WorldMap) GetJSONRegion(startX, endX, startY, endY int) ([]byte, error) {
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regionMap := map[int]map[int]int{}
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for x := startX; x < endX; x++ {
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regionMap[x] = map[int]int{}
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for y := startY; y < endY; y++ {
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// GetTile and ignore out of bounds errors
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result, _ := m.GetTile(x, y)
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regionMap[x][y] = result
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}
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}
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jsonString, err := json.Marshal(regionMap)
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return jsonString, err
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}
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// GetJSONRegionAround returns a JSON object of tile data from a center point
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func (m WorldMap) GetJSONRegionAround(centerX float64, centerY float64, regionRadius int) ([]byte, error) {
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var xCenter int = int(centerX)
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var yCenter int = int(centerY)
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jsonString, err := m.GetJSONRegion(xCenter-regionRadius, xCenter+regionRadius, yCenter-regionRadius, yCenter+regionRadius)
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return jsonString, err
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}
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// IntializeMap is a method that helps easily
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// generate WorldMap objects
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func IntializeMap() *WorldMap {
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worldMap := new(WorldMap)
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worldMap.max_x = 256
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worldMap.max_y = 256
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worldMap.data = [256][256]int{}
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for x := 0; x < worldMap.max_x; x++ {
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for y := 0; y < worldMap.max_y; y++ {
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worldMap.data[x][y] = 0
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}
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}
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// Add dot at top left for testing
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worldMap.data[0][0] = 1
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return worldMap
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}
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