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

@@ -10,7 +10,7 @@ public class Camera {
     public static final float zNear = 0.01f;
     public static final float zFar = 1000.0f;
 
-    private static final Vector3f up = new Vector3f(0.0f, 1.0f, 0.0f);
+    private static final Vector3f up = new Vector3f(0.0f, -1.0f, 0.0f);
     private static final Vector3f center = new Vector3f(0.0f, 0.0f, 0.0f);
 
     private final float distance = 1.5f;

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

@@ -232,12 +232,10 @@ public class DDDView extends GameAdaptator implements GameListener {
 	}
 
 	public void run() {
-		/*
+		// this.window.addRegularTask((delta) -> {
-		this.window.addRegularTask((delta) -> {
+		// 	final float angle = 1f; 
-			final float angle = 1f; 
+		// 	this.camera.setRotateAngle(this.camera.getRotateAngle() + angle * delta);
-			this.camera.setRotateAngle(this.camera.getRotateAngle() + angle * delta);
+		// });
-		});
-		*/
 		this.window.run();
 
 		// free OpenGL resources

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

@@ -1,9 +1,16 @@
 package chess.view.DDDrender;
 
+import static org.lwjgl.opengl.GL11.GL_DEPTH_COMPONENT;
+import static org.lwjgl.opengl.GL11.GL_RGB;
+import static org.lwjgl.opengl.GL11.GL_TEXTURE_2D;
+import static org.lwjgl.opengl.GL11.GL_UNSIGNED_BYTE;
 import static org.lwjgl.opengl.GL11.GL_UNSIGNED_INT;
+import static org.lwjgl.opengl.GL11.glBindTexture;
+import static org.lwjgl.opengl.GL11.glTexImage2D;
 
 import java.io.Closeable;
 import java.io.IOException;
+import java.nio.IntBuffer;
 
 import org.joml.Matrix4f;
 import org.joml.Vector3f;
@@ -14,7 +21,7 @@ import chess.view.DDDrender.shader.BoardShader;
 import chess.view.DDDrender.shader.PieceShader;
 import chess.view.DDDrender.shader.ShaderProgram;
 
-public class Renderer implements Closeable{
+public class Renderer implements Closeable {
 	private BoardShader boardShader;
 	private PieceShader pieceShader;
 
@@ -26,6 +33,32 @@ public class Renderer implements Closeable{
 	public void Init() {
 		boardShader.LoadShader();
 		pieceShader.LoadShader();
+
+		// The frame buffer
+		int fbo = GL30.glGenFramebuffers();
+		GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, fbo);
+
+		// The texture
+		int renderTexture = GL30.glGenTextures();
+		glBindTexture(GL_TEXTURE_2D, renderTexture);
+
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 800, 800, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
+
+		GL30.glTexParameteri(GL_TEXTURE_2D, GL30.GL_TEXTURE_MAG_FILTER, GL30.GL_NEAREST);
+		GL30.glTexParameteri(GL_TEXTURE_2D, GL30.GL_TEXTURE_MIN_FILTER, GL30.GL_NEAREST);
+
+		// The depth buffer
+		int depthBuffer = GL30.glGenRenderbuffers();
+		GL30.glBindRenderbuffer(GL30.GL_RENDERBUFFER, depthBuffer);
+		GL30.glRenderbufferStorage(GL30.GL_RENDERBUFFER, GL_DEPTH_COMPONENT, 800, 800);
+		GL30.glFramebufferRenderbuffer(GL30.GL_FRAMEBUFFER, GL30.GL_DEPTH_ATTACHMENT, GL30.GL_RENDERBUFFER,
+				depthBuffer);
+
+		// Set "renderedTexture" as our colour attachement #0
+		GL30.glFramebufferTexture2D(GL30.GL_FRAMEBUFFER, GL30.GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, renderTexture, 0);
+		// Set the list of draw buffers.
+		int[] drawBuffers = { GL30.GL_COLOR_ATTACHMENT0 };
+		GL30.glDrawBuffers(drawBuffers);
 	}
 
 	public void Update(Camera cam) {
@@ -35,10 +68,10 @@ public class Renderer implements Closeable{
 		this.pieceShader.SetCamMatrix(cam);
 	}
 
-	public void Render(DDDModel model, Vector3f color, Vector3f position, float rotation) {
+	public void Render(DDDModel model, Vector3f color, Matrix4f transform) {
 		this.pieceShader.Start();
 		this.pieceShader.setModelColor(color);
-		this.pieceShader.setModelTransform(new Matrix4f().translate(position).rotate(rotation, new Vector3f(0, 1, 0)));
+		this.pieceShader.setModelTransform(transform);
 		Render(model);
 	}
 

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

@@ -13,6 +13,7 @@ import chess.view.DDDrender.world.World;
 import common.Signal1;
 import imgui.ImFontConfig;
 import imgui.ImGui;
+import imgui.ImVec2;
 import imgui.gl3.ImGuiImplGl3;
 import imgui.glfw.ImGuiImplGlfw;
 
@@ -92,15 +93,6 @@ public class Window implements Closeable {
 		ImGui.destroyContext();
 	}
 
-	private void setCallbacks() {
-		glfwSetMouseButtonCallback(this.window, (window, button, action, mods) -> {
-			if (button == GLFW_MOUSE_BUTTON_1 && action == GLFW_PRESS) {
-				if (this.lastCell.isValid())
-					this.OnCellClick.emit(this.lastCell);
-			}
-		});
-	}
-
 	private void initImGui() {
 		ImGui.setCurrentContext(ImGui.createContext());
 
@@ -162,8 +154,6 @@ public class Window implements Closeable {
 
 		GL.createCapabilities();
 
-		setCallbacks();
-
 		initImGui();
 
 		renderer.Init();
@@ -176,9 +166,13 @@ public class Window implements Closeable {
 	}
 
 	private void render(float delta, float aspectRatio) {
-		cam.setAspectRatio(aspectRatio);
+		cam.setAspectRatio(1.0f);
+		GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, 1);
+		glViewport(0, 0, 800, 800);
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear the framebuffer
 		renderer.Update(cam);
 		renderWorld();
+		GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, 0);
 	}
 
 	private void renderWorld() {
@@ -198,11 +192,8 @@ public class Window implements Closeable {
 		}
 	}
 
-	private void checkCursor(int windowWidth, int windowHeight) {
+	private void checkCursor(float cursorPosX, float cursorPosY, int windowWidth, int windowHeight) {
-		double x[] = new double[1];
+		Vector2f cursorPos = this.cam.getCursorWorldFloorPos(new Vector2f(cursorPosX, cursorPosY), windowWidth,
-		double y[] = new double[1];
-		glfwGetCursorPos(this.window, x, y);
-		Vector2f cursorPos = this.cam.getCursorWorldFloorPos(new Vector2f((float) x[0], (float) y[0]), windowWidth,
 				windowHeight);
 		Coordinate selectedCell = DDDPlacement.vectorToCoordinates(cursorPos);
 		if (this.lastCell == null) {
@@ -216,6 +207,11 @@ public class Window implements Closeable {
 				this.OnCellEnter.emit(selectedCell);
 			this.lastCell = selectedCell;
 		}
+
+		if (ImGui.getIO().getMouseClicked(0)) {
+			if (this.lastCell != null && this.lastCell.isValid())
+				this.OnCellClick.emit(this.lastCell);
+		}
 	}
 
 	private void newFrame() {
@@ -226,6 +222,18 @@ public class Window implements Closeable {
 		ImGui.newFrame();
 	}
 
+	private void renderWindow() {
+		ImGui.showDemoWindow();
+
+		ImGui.begin("Hello");
+		ImGui.text("FPS : " + ImGui.getIO().getFramerate());
+		ImVec2 mousePos = ImGui.getIO().getMousePos();
+		ImVec2 framePos = ImGui.getCursorScreenPos();
+		checkCursor(mousePos.x - framePos.x, 800 - (mousePos.y - framePos.y), 800, 800);
+		ImGui.image(1, new ImVec2(800, 800));
+		ImGui.end();
+	}
+
 	private void loop() {
 
 		// Set the clear color
@@ -255,7 +263,7 @@ public class Window implements Closeable {
 			float deltaTime = (float) (currentTime - lastTime);
 			render(deltaTime, (float) width[0] / (float) height[0]);
 
-			// ImGui.showDemoWindow();
+			renderWindow();
 			ImGui.render();
 			implGl3.renderDrawData(ImGui.getDrawData());
 
@@ -267,8 +275,6 @@ public class Window implements Closeable {
 			// invoked during this call.
 			glfwPollEvents();
 
-			checkCursor(width[0], height[0]);
-
 			executeTasks(deltaTime);
 
 			glfwGetWindowSize(window, width, height);

app/src/main/java/chess/view/DDDrender/shader/BoardShader.java

@@ -46,7 +46,7 @@ public class BoardShader extends ShaderProgram {
 			in vec3 toCameraVector;
 			in vec3 surfaceNormal;
 
-			out vec4 out_color;
+			layout(location = 0) out vec4 out_color;
 
 			void main(void){
 				const float shineDamper = 10.0;

app/src/main/java/chess/view/DDDrender/shader/PieceShader.java

@@ -48,7 +48,7 @@ public class PieceShader extends ShaderProgram {
 
 			uniform vec3 modelColor;
 
-			out vec4 out_color;
+			layout(location = 0) out vec4 out_color;
 
 			void main(void){
 				const float shineDamper = 10.0;

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

@@ -2,6 +2,7 @@ package chess.view.DDDrender.world;
 
 import java.io.IOException;
 
+import org.joml.Matrix4f;
 import org.joml.Vector3f;
 
 import chess.model.Coordinate;
@@ -45,4 +46,9 @@ public class BoardEntity extends Entity {
 		vao.close();
 	}
 
+	@Override
+	public Matrix4f getTransform() {
+		return null;
+	}
+
 }

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

@@ -2,10 +2,14 @@ package chess.view.DDDrender.world;
 
 import java.io.Closeable;
 
+import org.joml.Matrix4f;
+
 import chess.view.DDDrender.Renderer;
 
 public abstract class Entity implements Closeable{
 
 	public abstract void render(Renderer renderer);
 
+	public abstract Matrix4f getTransform();
+
 }

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

@@ -2,6 +2,7 @@ package chess.view.DDDrender.world;
 
 import java.io.IOException;
 
+import org.joml.Matrix4f;
 import org.joml.Vector3f;
 
 import chess.view.DDDrender.DDDModel;
@@ -14,20 +15,24 @@ public class ModelEntity extends Entity {
 	protected float rotation;
 	protected DDDModel model;
 
+	private Matrix4f transform;
+
 	public ModelEntity(DDDModel model, Vector3f position, Vector3f color, float rotation) {
 		this.position = position;
 		this.color = color;
 		this.rotation = rotation;
 		this.model = model;
+		updateTransform();
 	}
 
 	@Override
 	public void render(Renderer renderer) {
-		renderer.Render(model, color, position, rotation);
+		renderer.Render(model, color, transform);
 	}
 
 	public void setPosition(Vector3f position) {
 		this.position = position;
+		updateTransform();
 	}
 
 	public void setColor(Vector3f color) {
@@ -36,6 +41,7 @@ public class ModelEntity extends Entity {
 
 	public void setRotation(float rotation) {
 		this.rotation = rotation;
+		updateTransform();
 	}
 
 	@Override
@@ -43,4 +49,13 @@ public class ModelEntity extends Entity {
 		this.model.close();
 	}
 
+	private void updateTransform() {
+		this.transform = new Matrix4f().translate(this.position).rotate(this.rotation, new Vector3f(0, 1, 0));
+	}
+
+	@Override
+	public Matrix4f getTransform() {
+		return transform;
+	}
+
 }