feat: change board cells color

app/src/main/java/chess/view/DDDrender/world/BoardEntity.java

@@ -0,0 +1,41 @@
+package chess.view.DDDrender.world;
+
+import org.joml.Vector3f;
+
+import chess.model.Coordinate;
+import chess.view.DDDrender.Renderer;
+import chess.view.DDDrender.loader.BoardModelLoader;
+import chess.view.DDDrender.opengl.VertexArray;
+import chess.view.DDDrender.opengl.VertexBuffer;
+
+public class BoardEntity extends Entity {
+
+	private final VertexArray vao;
+	private final VertexBuffer colorVbo;
+
+	private static final Vector3f WHITE = new Vector3f(1, 1, 1);
+	private static final Vector3f BLACK = new Vector3f(0, 0, 0);
+
+	public BoardEntity() {
+		this.vao = BoardModelLoader.GetBoardModel();
+		this.colorVbo = this.vao.getVertexBuffers().get(1);
+	}
+
+	public void setCellColor(Coordinate coord, Vector3f color) {
+		float[] data = { color.x, color.y, color.z, color.x, color.y, color.z, color.x, color.y, color.z, color.x,
+				color.y, color.z};
+		int cellNumber = (Coordinate.VALUE_MAX - 1 - coord.getX()) * Coordinate.VALUE_MAX + Coordinate.VALUE_MAX - 1 - coord.getY();
+		int offset = cellNumber * 4 * 4 * 3;
+		this.colorVbo.UpdateData(offset, data);
+	}
+
+	public void resetCellColor(Coordinate coord) {
+		setCellColor(coord, (coord.getX() + coord.getY()) % 2 == 0 ? WHITE : BLACK);
+	}
+
+	@Override
+	public void render(Renderer renderer) {
+		renderer.RenderVao(renderer.getBoardShader(), vao);
+	}
+
+}