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// Mines is free software: you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
// Mines is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along with
// Mines. If not, see <https://www.gnu.org/licenses/>.
package space.jakob.mines
import android.content.Context
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.Canvas
import android.graphics.Rect
import android.graphics.Paint
import android.util.AttributeSet
import android.view.View
import android.util.Log
const val atlasWidth = 3
const val tileSpacing = 2.0 / 27.0
enum class AtlasEntry {
BLANK, MASKED, UNMASKED,
ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT,
FLAG, UNKNOWN, MINE, TRIPPED,
}
class GameView(context: Context, attrs: AttributeSet) : View(context, attrs) {
val atlas = BitmapFactory.decodeResource(context.resources, R.drawable.atlas);
val tileWidth = atlas.width / 3
var grid: Grid? = null
var cameraX = 0.0
var cameraY = 0.0
var sightX = 5.0
var sightY = 5.0
val maxCameraX: Double
get() = grid?.let {
it.width - sightX
} ?: 0.0
val maxCameraY: Double
get() = grid?.let {
it.height - sightY
} ?: 0.0
// The size, in pixels, of an individual tile based on the current scale
// factor.
val scaledWidth: Int
get() = width / sightX.toInt()
val scaledHeight: Int
get() = height / sightY.toInt()
/**
* Returns the grid coordinates for the tile at the given screen coordinates.
*/
fun toGridCoordinates(x: Int, y: Int) = Pair(
(x + (scaledWidth * (cameraX % 1)).toInt()) / scaledWidth + cameraX.toInt(),
(y + (scaledHeight * (cameraY % 1)).toInt()) / scaledHeight + cameraY.toInt()
)
private fun atlasRect(entry: AtlasEntry): Rect {
val x = (entry.ordinal % atlasWidth) * tileWidth
val y = (entry.ordinal / atlasWidth) * tileWidth
return Rect(x, y, x + tileWidth, y + tileWidth)
}
private fun drawTile(canvas: Canvas, tile: Tile, x: Int, y: Int) {
val xSpacing = (scaledWidth * tileSpacing).toInt()
val ySpacing = (scaledWidth * tileSpacing).toInt()
val dst = Rect(
x + xSpacing,
y + ySpacing,
x + scaledWidth - xSpacing,
y + scaledHeight - ySpacing
)
if (tile.masked) {
canvas.drawBitmap(atlas, atlasRect(AtlasEntry.MASKED), dst, null)
} else {
canvas.drawBitmap(atlas, atlasRect(AtlasEntry.UNMASKED), dst, null)
val overlay = when {
tile.mine -> AtlasEntry.MINE
tile.adjacentMines == 1 -> AtlasEntry.ONE
tile.adjacentMines == 2 -> AtlasEntry.TWO
tile.adjacentMines == 3 -> AtlasEntry.THREE
tile.adjacentMines == 4 -> AtlasEntry.FOUR
tile.adjacentMines == 5 -> AtlasEntry.FIVE
tile.adjacentMines == 6 -> AtlasEntry.SIX
tile.adjacentMines == 7 -> AtlasEntry.SEVEN
tile.adjacentMines == 8 -> AtlasEntry.EIGHT
else -> AtlasEntry.BLANK
}
canvas.drawBitmap(atlas, atlasRect(overlay), dst, null)
}
}
private fun drawGrid(canvas: Canvas, grid: Grid) {
val startX = cameraX.toInt() // Truncates the fractional component.
val startY = cameraY.toInt()
val howManyX = (sightX.toInt() + 1).coerceAtMost(grid.width - startX - 1)
val howManyY = (sightY.toInt() + 1).coerceAtMost(grid.height - startY - 1)
for (i in 0..howManyX) {
for (j in 0..howManyY) {
val tile = grid[startX + i, startY + j]
val xOffset = (scaledWidth * (cameraX % 1)).toInt()
val yOffset = (scaledHeight * (cameraY % 1)).toInt()
drawTile(
canvas,
tile,
i * scaledWidth - xOffset,
j * scaledHeight - yOffset
)
}
}
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
grid?.let {
drawGrid(canvas, it)
}
}
}
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