begin 3d

app/src/main/java/chess/view/DDDrender/Renderer.java

@@ -0,0 +1,124 @@
+package chess.view.DDDrender;
+
+import static org.lwjgl.opengl.GL11.GL_UNSIGNED_INT;
+
+import org.joml.Vector3f;
+import org.lwjgl.opengl.GL30;
+
+import chess.view.DDDrender.shader.BoardShader;
+
+public class Renderer {
+	private BoardShader shader;
+	private VertexArray vao;
+
+	private static int BOARD_WIDTH = 8;
+	private static int BOARD_HEIGHT = 8;
+	private static int BOARD_SIZE = BOARD_WIDTH * BOARD_HEIGHT;
+	private static int SQUARE_VERTEX_COUNT = 4;
+
+	public Renderer() {
+		this.shader = new BoardShader();
+	}
+
+	public void Init() {
+		shader.LoadShader();
+		InitBoard();
+	}
+
+	private float[] GetBoardPositions() {
+		float[] positions = new float[BOARD_SIZE * SQUARE_VERTEX_COUNT * 3];
+		for (int i = 0; i < BOARD_WIDTH; i++) {
+			for (int j = 0; j < BOARD_HEIGHT; j++) {
+				float x = i / (float) BOARD_WIDTH;
+				float dx = (i + 1) / (float) BOARD_WIDTH;
+				float z = j / (float) BOARD_HEIGHT;
+				float dz = (j + 1) / (float) BOARD_HEIGHT;
+
+				float trueX = 2 * x - 1;
+				float trueZ = 2 * z - 1;
+				float trueDX = 2 * dx - 1;
+				float trueDZ = 2 * dz - 1;
+
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3] = trueX;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 1] = 0.0f;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 2] = trueZ;
+
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 3] = trueDX;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 4] = 0.0f;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 5] = trueZ;
+
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 6] = trueX;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 7] = 0.0f;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 8] = trueDZ;
+
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 9] = trueDX;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 10] = 0.0f;
+				positions[(BOARD_WIDTH * i + j) * SQUARE_VERTEX_COUNT * 3 + 11] = trueDZ;
+			}
+		}
+		return positions;
+	}
+
+	private float[] GetBoardColors() {
+		float[] colors = new float[BOARD_SIZE * SQUARE_VERTEX_COUNT * 3];
+		for (int i = 0; i < BOARD_WIDTH; i++) {
+			for (int j = 0; j < BOARD_HEIGHT; j++) {
+				Vector3f color;
+				if ((i + j) % 2 != 0) {
+					color = new Vector3f(1.0f, 1.0f, 1.0f);
+				} else {
+					color = new Vector3f(0.0f, 0.0f, 0.0f);
+				}
+				int squareIndex = i * BOARD_WIDTH + j;
+				for (int k = 0; k < SQUARE_VERTEX_COUNT; k++) {
+					colors[squareIndex * SQUARE_VERTEX_COUNT * 3 + k * 3] = color.x;
+					colors[squareIndex * SQUARE_VERTEX_COUNT * 3 + k * 3 + 1] = color.y;
+					colors[squareIndex * SQUARE_VERTEX_COUNT * 3 + k * 3 + 2] = color.z;
+				}
+			}
+		}
+		return colors;
+	}
+
+	private int[] GetBoardIndicies() {
+		int[] indices = new int[BOARD_SIZE * 6];
+		for (int i = 0; i < BOARD_SIZE; i++) {
+			indices[i * 6] = i * 4;
+			indices[i * 6 + 1] = i * 4 + 1;
+			indices[i * 6 + 2] = i * 4 + 2;
+			indices[i * 6 + 3] = i * 4 + 1;
+			indices[i * 6 + 4] = i * 4 + 2;
+			indices[i * 6 + 5] = i * 4 + 3;
+		}
+		return indices;
+	}
+
+	private void InitBoard() {
+		ElementBuffer eBuffer = new ElementBuffer(GetBoardIndicies());
+		this.vao = new VertexArray(eBuffer);
+
+		VertexBuffer positionBuffer = new VertexBuffer(GetBoardPositions(), 3);
+		positionBuffer.AddVertexAttribPointer(0, 3, 0);
+
+		VertexBuffer colorBuffer = new VertexBuffer(GetBoardColors(), 3);
+		colorBuffer.AddVertexAttribPointer(1, 3, 0);
+
+		this.vao.Bind();
+		this.vao.BindVertexBuffer(positionBuffer);
+		this.vao.BindVertexBuffer(colorBuffer);
+		this.vao.Unbind();
+	}
+
+	public void Render(Camera cam) {
+		this.shader.Start();
+		this.shader.SetCamMatrix(cam.getMatrix());
+		RenderVao(vao);
+	}
+
+	public void RenderVao(VertexArray vertexArray) {
+		this.shader.Start();
+		vertexArray.Bind();
+		GL30.glDrawElements(GL30.GL_TRIANGLES, vertexArray.GetVertexCount(), GL_UNSIGNED_INT, 0);
+		vertexArray.Unbind();
+	}
+}