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

@@ -22,6 +22,9 @@ public class Renderer {
 	private VertexArray boardVao;
 	private final PieceModel models;
 
+	private static final Vector3f BLACK = new Vector3f(0.1f, 0.1f, 0.1f);
+	private static final Vector3f WHITE = new Vector3f(0.7f, 0.7f, 0.7f);
+
 	public Renderer() {
 		this.boardShader = new BoardShader();
 		this.pieceShader = new PieceShader();
@@ -37,7 +40,8 @@ public class Renderer {
 	public void RenderPiece(Piece piece, Coordinate pos) {
 		try {
 			DDDModel pieceModel = this.models.getModel(piece);
-			Render(pieceModel, DDDPlacement.coordinates_to_vector(pos), piece.getColor() == Color.White ? 0.0f : 3.14f);
+			Render(pieceModel, piece.getColor() == Color.White ? WHITE : BLACK, DDDPlacement.coordinates_to_vector(pos),
+					piece.getColor() == Color.White ? 0.0f : 3.14f);
 		} catch (IOException e) {
 			e.printStackTrace();
 		}
@@ -51,9 +55,10 @@ public class Renderer {
 		RenderVao(this.boardShader, this.boardVao);
 	}
 
-	public void Render(DDDModel model, Vector2f position, float rotation) {
+	public void Render(DDDModel model, Vector3f color, Vector2f position, float rotation) {
 		Vector3f realPos = new Vector3f(position.x(), 0, position.y());
 		this.pieceShader.Start();
+		this.pieceShader.setModelColor(color);
 		this.pieceShader.setModelTransform(new Matrix4f().translate(realPos).rotate(rotation, new Vector3f(0, 1, 0)));
 		Render(model);
 	}

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

@@ -1,6 +1,7 @@
 package chess.view.DDDrender.shader;
 
 import org.joml.Matrix4f;
+import org.joml.Vector3f;
 
 public class PieceShader extends ShaderProgram {
 
@@ -18,8 +19,6 @@ public class PieceShader extends ShaderProgram {
 			out vec3 toLightVector;
 			out vec3 surfaceNormal;
 
-			flat out vec3 pass_color;
-
 			void main(void){
 				vec4 worldPos = modelTransform * vec4(position, 1.0);
 
@@ -27,7 +26,6 @@ public class PieceShader extends ShaderProgram {
 				surfaceNormal = (modelTransform * vec4(normal, 0.0)).xyz;
 
 				gl_Position = camMatrix * worldPos;
-				pass_color = position;
 			}
 				""";
 
@@ -37,7 +35,7 @@ public class PieceShader extends ShaderProgram {
 			in vec3 toLightVector;
 			in vec3 surfaceNormal;
 
-			flat in vec3 pass_color;
+			uniform vec3 modelColor = vec3(1, 1, 1);
 
 			out vec4 out_color;
 
@@ -49,7 +47,7 @@ public class PieceShader extends ShaderProgram {
 
 				float brightness = diffuse;
 
-				out_color = vec4(pass_color, 1.0) * brightness;
+				out_color = vec4(modelColor, 1.0) * brightness;
 				out_color.w = 1.0;
 
 			}
@@ -57,6 +55,7 @@ public class PieceShader extends ShaderProgram {
 
 	private int location_CamMatrix = 0;
 	private int location_ModelTransform = 0;
+	private int location_ModelColor = 0;
 
 	public PieceShader() {
 
@@ -70,6 +69,7 @@ public class PieceShader extends ShaderProgram {
 	protected void GetAllUniformLocation() {
 		location_CamMatrix = GetUniformLocation("camMatrix");
 		location_ModelTransform = GetUniformLocation("modelTransform");
+		location_ModelColor = GetUniformLocation("modelColor");
 	}
 
 	public void SetCamMatrix(Matrix4f mat) {
@@ -79,4 +79,8 @@ public class PieceShader extends ShaderProgram {
 	public void setModelTransform(Matrix4f mat) {
 		LoadMat4(location_ModelTransform, mat);
 	}
+
+	public void setModelColor(Vector3f color) {
+		LoadVector(location_ModelColor, color);
+	}
 }