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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
import kotlin.math.ceil
import kotlin.math.floor
enum class AtlasEntry {
BLANK, MASKED, UNMASKED,
ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT,
FLAG, UNKNOWN, MINE, TRIPPED,
}
/**
* Linearly interpolate between @param v0 and @param v1.
*/
fun lerp(v0: Double, v1: Double, dt: Double) = v0 + dt * (v1 - v0)
class GameView(context: Context, attrs: AttributeSet) : View(context, attrs) {
val atlas = BitmapFactory.decodeResource(context.resources, R.drawable.atlas);
// The number of tiles contained within each row of atlas.
val atlasTilesPerRow = 3
// The size, in pixels, of each tile in atlas.
val atlasTileWidth = atlas.width / 3
// The camera's current position.
var cameraX = 0.0
var cameraY = 0.0
// The position that the camera will interpolate towards.
var cameraDestX = 0.0
var cameraDestY = 0.0
// Offset values to the center of the screen.
val cameraOffsetX: Double
get() = width / 2.0
val cameraOffsetY: Double
get() = height / 2.0
// The current scale at which to draw tiles.
var cameraScale = 64.0
// Reference to GameActivity's grid that should be treated as read-only.
var grid: Grid? = null
/**
* @return the grid coordinates for the tile at the given screen coordinates.
*/
fun toGridCoordinates(x: Int, y: Int) = Pair(
0,
0
)
/**
* Moves the camera by (@param dx, @param dy), clamping to grid bounds.
*/
fun moveCamera(dx: Double, dy: Double) {
val minimumX = 0.0
val minimumY = 0.0
val maximumX = grid?.let { it.width.toDouble() }
val maximumY = grid?.let { it.height.toDouble() }
cameraDestX = (cameraDestX + dx / 64.0).coerceIn(minimumX, maximumX)
cameraDestY = (cameraDestY + dy / 64.0).coerceIn(minimumY, maximumY)
}
fun scaleCamera(factor: Double) {
}
/**
* @return a source Rect into @see atlas for an AtlasEntry.
*/
private fun atlasRect(entry: AtlasEntry): Rect {
val x = (entry.ordinal % atlasTilesPerRow) * atlasTileWidth
val y = (entry.ordinal / atlasTilesPerRow) * atlasTileWidth
return Rect(x, y, x + atlasTileWidth, y + atlasTileWidth)
}
private fun drawTile(canvas: Canvas, tile: Tile, x: Int, y: Int) {
// Amount of blank space for padding between tiles.
val tileSpacing = 2.0 / 27.0
val xSpacing = (cameraScale * tileSpacing).toInt()
val ySpacing = (cameraScale * tileSpacing).toInt()
val dst = Rect(
x + xSpacing,
y + ySpacing,
x + cameraScale.toInt() - xSpacing,
y + cameraScale.toInt() - ySpacing
)
if (tile.masked) {
canvas.drawBitmap(atlas, atlasRect(AtlasEntry.MASKED), dst, null)
if (tile.flagged) {
canvas.drawBitmap(atlas, atlasRect(AtlasEntry.FLAG), 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) {
for (x in 0 until grid.width) {
for (y in 0 until grid.height) {
val screenX = (x - cameraX) * cameraScale + cameraOffsetX
val screenY = (y - cameraY) * cameraScale + cameraOffsetY
drawTile(canvas, grid[x, y], screenX.toInt(), screenY.toInt())
}
}
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
// TODO: Replace 0.1 with dynamic dt
cameraX = lerp(cameraX, cameraDestX, 0.1)
cameraY = lerp(cameraY, cameraDestY, 0.1)
grid?.let {
drawGrid(canvas, it)
}
}
}
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