projection matrix

src/Game.java

@@ -0,0 +1,6 @@
+abstract public class Game {
+	abstract public void setup() throws Exception;
+	abstract public void loop() throws Exception;
+	abstract public void close() throws Exception;
+
+}

src/Test.java

@@ -3,13 +3,14 @@ import org.hl.engine.io.Display;
 import org.hl.engine.io.Input;
 import org.hl.engine.math.lalg.Vector3f;
 import org.hl.engine.math.lalg.Vector2f;
+import org.hl.engine.objects.GameObject;
 import org.lwjgl.glfw.GLFW;
 
 
 
-public class Test {
+public class Test extends Game {
 	// Defining original parts of the game
-	public final static int WIDTH = 640, HEIGHT = 480;
+	public final static int WIDTH = 1280, HEIGHT = 760;
 	public final String windowName = "Game!";
 	public Display display;
 	public Input i;
@@ -26,7 +27,9 @@ public class Test {
 			0, 1, 2,
 			0, 2, 3
 
-	}, new Material(new Texture("resources/textures/thonk.png")));
+	}, new Material(new Texture("resources/textures/b.png")));
+
+	public GameObject testObject = new GameObject(mesh, new Vector3f(0, 0, -1), new Vector3f(0, 0, 0), new Vector3f(1, 1, 1));
 
 
 
@@ -41,25 +44,40 @@ public class Test {
 
 	}
 
-	public void loop() {
-		update();
-		render();
+	public void loop(){
+
+
+		//First updating
+		int frames = display.update();
+		//testObject.update();
+		display.setWindowName(display.getWindowName().substring(0, 4) + " (Frames : " + frames + ")");
+
+		i.reset();
+
+
+		// Now Render!
+
+
+		// rendering the mesh
+		renderer.renderMesh(testObject);
+		//swap buffers so the new one will appear
+		display.swapBuffers();
 	}
 
 
 	public void setup() throws Exception {
 		//First, set up the display
-		display = new Display(WIDTH, HEIGHT, windowName);
+		display = new Display(WIDTH, HEIGHT, windowName, 70, 0.1f, 1000f);
 		display.create();
 
-		// Open the shaders (not necessary there are textures)
-		shader = new Shader("/resources/shaders/mainVertex.glsl", "/resources/shaders/mainFragment.glsl");
+		// Open the shaders
+		shader = new Shader(Shader.VERTEXSHADER, Shader.FRAGSHADER);
 
 		// Set up the renderer
-		renderer = new Renderer(shader);
+		renderer = new Renderer(display, shader);
 
 		// Changing the background color
-		display.setBackgroundColor(1F, 1F, 1F);
+		display.setBackgroundColor(0F, 0F, 0F);
 
 		// Creating / displaying the mesh
 		mesh.create();
@@ -69,25 +87,7 @@ public class Test {
 
 	}
 
-	// Updating
-	private void update() {
-		// Just updating lmfao
-		int frames = display.update();
-		display.setWindowName(display.getWindowName().substring(0, 4) + " (Frames : " + frames + ")");
-
-		i.reset();
-
-	}
-
-	private void render() {
-		// rendering the mesh
-		renderer.renderMesh(mesh);
-		//swap buffers so the new one will appear
-		display.swapBuffers();
-
-	}
-
-	private void close() {
+	public void close() {
 		// Removing everything
 		display.destroy();
 		mesh.destroy();

src/org/hl/engine/graphics/Renderer.java

@@ -1,5 +1,8 @@
 package org.hl.engine.graphics;
 
+import org.hl.engine.io.Display;
+import org.hl.engine.math.lalg.Matrix4f;
+import org.hl.engine.objects.GameObject;
 import org.lwjgl.opengl.GL11;
 import org.lwjgl.opengl.GL13;
 import org.lwjgl.opengl.GL15;
@@ -8,30 +11,32 @@ import org.lwjgl.opengl.GL30;
 public class Renderer {
 
 	private Shader shader;
+	private Display display;
 
-	public Renderer(Shader shader) {
+	public Renderer(Display display, Shader shader) {
 		this.shader = shader;
+		this.display = display;
 	}
 
-
-	public void renderMesh(Mesh mesh) {
+	public void renderMesh(GameObject object) {
 
 		// Renders the mesh by drawing it using triangles (least complicated)
-		GL30.glBindVertexArray(mesh.getVertexArrayObject());
+		GL30.glBindVertexArray(object.getMesh().getVertexArrayObject());
 		GL30.glEnableVertexAttribArray(0);
 		GL30.glEnableVertexAttribArray(1);
 		GL30.glEnableVertexAttribArray(2);
-		GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, mesh.getIndicesBufferObject());
+		GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, object.getMesh().getIndicesBufferObject());
 
 		GL13.glActiveTexture(GL13.GL_TEXTURE0);
 
-		GL13.glBindTexture(GL11.GL_TEXTURE_2D, mesh.getMaterial().getTexture().getId());
+		GL13.glBindTexture(GL11.GL_TEXTURE_2D, object.getMesh().getMaterial().getTexture().getId());
 
 		shader.bind();
 
-		shader.setUniform("scale", 2.0F);
+		shader.setUniform("model", Matrix4f.transform(object.getPosition(), object.getRotation(), object.getScale()));
+		shader.setUniform("projection", display.getProjectionMatrix());
 
-		GL11.glDrawElements(GL11.GL_TRIANGLES, mesh.getIndices().length, GL11.GL_UNSIGNED_INT, 0);
+		GL11.glDrawElements(GL11.GL_TRIANGLES, object.getMesh().getIndices().length, GL11.GL_UNSIGNED_INT, 0);
 
 		shader.unbind();
 		GL30.glDisableVertexAttribArray(0);

src/org/hl/engine/graphics/Shader.java

@@ -17,6 +17,9 @@ public class Shader {
 
 	private int vertexID, fragmentID, programID;
 
+	public static final String VERTEXSHADER = "/resources/shaders/mainVertex.glsl";
+	public static final String FRAGSHADER = "/resources/shaders/mainFragment.glsl";
+
 	public Shader(String vertexPath, String fragmentPath) {
 		vertexFile = FileUtils.loadAsString(vertexPath);
 		fragmentFile = FileUtils.loadAsString(fragmentPath);

src/org/hl/engine/io/Display.java

@@ -1,5 +1,6 @@
 package org.hl.engine.io;
 
+import org.hl.engine.math.lalg.Matrix4f;
 import org.hl.engine.math.lalg.Vector3f;
 import org.lwjgl.glfw.GLFWErrorCallback;
 import org.lwjgl.glfw.GLFWVidMode;
@@ -29,15 +30,16 @@ public class Display {
 	private int savedPosY;
 	private int savedWidth;
 	private int savedHeight;
-
+	private Matrix4f projection;
 
 
 
 	// Constructor to create the display
-	public Display (int width, int height, String windowName) {
+	public Display (int width, int height, String windowName, float fov, float near, float far) {
 		this.width = width;
 		this.height = height;
 		this.windowName = windowName;
+		projection = Matrix4f.projection(fov, (float)this.width / (float) this.height, near, far);
 	}
 
 	// Change the window name
@@ -67,6 +69,10 @@ public class Display {
 		return isFullscreen;
 	}
 
+	public Matrix4f getProjectionMatrix() {
+		return projection;
+	}
+
 	// Makes the screen fullscreen or not based on the argument
 	public void setFullscreen(boolean fullscreen) {
 		isFullscreen = fullscreen;

src/org/hl/engine/math/lalg/Matrix4f.java

@@ -2,17 +2,130 @@ package org.hl.engine.math.lalg;
 
 public class Matrix4f {
 	public static final int SIZE = 4;
-	private float[][] elements;
+	private float[][] elements = new float[SIZE][SIZE];
+
+
+	public Matrix4f() {
+
+	}
+
+	public Matrix4f(float[][] values) {
+		this.elements = values;
+	}
+
+
+	public static Matrix4f identity() {
+		float[][] identityArray = {
+				{1 , 0 , 0 , 0},
+				{0 , 1 , 0 , 0},
+				{0 , 0 , 1 , 0},
+				{0 , 0 , 0 , 1}
+		};
+		Matrix4f identity = new Matrix4f(identityArray);
+		return identity;
+	}
+
+	public static Matrix4f translate(Vector3f translate) {
+		Matrix4f result = Matrix4f.identity();
+
+		result.set(3, 0, translate.getX());
+		result.set(3, 1, translate.getY());
+		result.set(3, 2, translate.getZ());
+
+		return result;
+	}
+
+	public static Matrix4f rotate(float angle, Vector3f axis) {
+
+		float cos = (float)Math.cos(Math.toDegrees(angle));
+		float sin = (float)Math.sin(Math.toDegrees(angle));
+		float C = 1 - cos;
+		float x = axis.getX();
+		float y = axis.getY();
+		float z = axis.getZ();
+		float[][] rotArray = {
+				{cos + x*x*C , x*y*C - z*sin , x*z*C + y*sin , 0},
+				{y*z*C + z*sin , cos + y*y*C , y*z*C - x*sin , 0},
+				{z*x*C-y*sin , z*y*C + x*sin  ,  cos + z*z*C , 0},
+				{0 , 0 , 0 , 1}
+		};
+		Matrix4f result = new Matrix4f(rotArray);
+		return result;
+	}
+
+	public static Matrix4f scale(Vector3f scaleVec) {
+
+		Matrix4f result = Matrix4f.identity();
+
+		result.set(0, 0, scaleVec.getX());
+		result.set(1, 1, scaleVec.getY());
+		result.set(2, 2, scaleVec.getZ());
+
+		return result;
+	}
+
+	public static Matrix4f projection( float fov, float aspectRatio, float near, float far) {
+		Matrix4f result = Matrix4f.identity();
+
+		float tan = (float)Math.tan(Math.toRadians(fov / 2));
+		float range = far - near;
+
+		result.set(0, 0, 1.0f / (aspectRatio * tan));
+		result.set(1, 1, 1.0f / tan);
+		result.set(2, 2, -((far + near) / range));
+		result.set(2, 3, -1.0f);
+		result.set(3, 2, -(2.0f*far*near/range));
+		result.set(3, 3, 0f);
+
+		return result;
+	}
+
+	public static Matrix4f multiply(Matrix4f first, Matrix4f second) {
+
+		Matrix4f result = Matrix4f.identity();
+
+		for (int i = 0; i < SIZE; i ++ ) {
+			for (int j = 0; j < SIZE; j ++) {
+				result.set(i, j,
+									first.get(i, 0) * second.get(0, j) +
+										first.get(i, 1) * second.get(1, j) +
+										first.get(i, 2) * second.get(2, j) +
+										first.get(i, 3) * second.get(3, j)
+				);
+			}
+		}
+
+		return result;
+
+	}
+
 	public float get(int x, int y) {
 		return elements[x][y];
 	}
+
 	public void set(int x, int y, float value) {
 		elements[x][y] = value;
 	}
+
 	public float[][] getAll() {
 		return elements;
 	}
 
+	public static Matrix4f transform(Vector3f position, Vector3f rotation, Vector3f scale) {
+		Matrix4f result = identity();
+		Matrix4f translationMatrix = Matrix4f.translate(position);
+		Matrix4f rotationXMatrix = Matrix4f.rotate(rotation.getX(), new Vector3f(1, 0, 0));
+		Matrix4f rotationYMatrix = Matrix4f.rotate(rotation.getY(), new Vector3f(0, 1, 0));
+		Matrix4f rotationZMatrix = Matrix4f.rotate(rotation.getZ(), new Vector3f(0, 0, 1));
+		Matrix4f scaleMatrix = Matrix4f.scale(scale);
+
+		Matrix4f rotMat = Matrix4f.multiply(rotationXMatrix, Matrix4f.multiply(rotationYMatrix, rotationZMatrix));
+
+		return Matrix4f.multiply(translationMatrix, Matrix4f.multiply(rotMat, scaleMatrix));
+
+	}
+
+
 	public float[] convertTo1D() {
 		float[] returnedArray = new float[SIZE*SIZE];
 		int sizeOfRow = elements[0].length;

src/org/hl/engine/math/lalg/Vector2f.java

@@ -15,6 +15,12 @@ public class Vector2f {
 		this.y = y;
 	}
 
+
+	public void add(float x, float y) {
+		this.x += x;
+		this.y += y;
+	}
+
 	public float getX() {
 		return x;
 	}

src/org/hl/engine/math/lalg/Vector3f.java

@@ -19,6 +19,12 @@ public class Vector3f {
 		this.z = z;
 	}
 
+	public void add(float x, float y, float z) {
+		this.x += x;
+		this.y += y;
+		this.z += z;
+	}
+
 	public float getX() {
 		return x;
 	}

src/org/hl/engine/math/lalg/Vector4f.java

@@ -21,6 +21,13 @@ public class Vector4f {
 		this.a = a;
 	}
 
+	public void add(float x, float y, float z, float a) {
+		this.x += x;
+		this.y += y;
+		this.z += z;
+		this.a += a;
+	}
+
 	public float getX() {
 		return x;
 	}

src/org/hl/engine/objects/GameObject.java

@@ -0,0 +1,36 @@
+package org.hl.engine.objects;
+
+import org.hl.engine.graphics.Mesh;
+import org.hl.engine.math.lalg.Vector3f;
+
+public class GameObject {
+	private Vector3f position, rotation, scale;
+	private Mesh mesh;
+
+	public GameObject(Mesh mesh, Vector3f position, Vector3f rotation, Vector3f scale) {
+		this.position = position;
+		this.rotation = rotation;
+		this.scale = scale;
+		this.mesh = mesh;
+	}
+
+	public void update() {
+		position.add(0, 0, -0.1F);
+	}
+
+	public Vector3f getPosition() {
+		return position;
+	}
+
+	public Vector3f getRotation() {
+		return rotation;
+	}
+
+	public Vector3f getScale() {
+		return scale;
+	}
+
+	public Mesh getMesh() {
+		return mesh;
+	}
+}

src/resources/shaders/mainVertex.glsl

@@ -4,17 +4,16 @@ layout(location = 0) in vec3 position;
 layout(location = 1) in vec3 color;
 layout(location = 2) in vec2 textureCoord;
 
-
-
+uniform mat4 model;
+uniform mat4 projection;
 
 layout(location = 0) out vec3 passColor;
 layout(location = 1) out vec2 passTextureCoord;
 
-uniform float scale;
 
 
 void main() {
-	gl_Position = vec4(position, 1.0) * vec4(scale, scale, scale, 1);
+	gl_Position = projection * model * vec4(position, 1.0);
 	passColor = color;
 
 	passTextureCoord = textureCoord;