From 4e88d1d1a4eabe4d057db8ced48283ea748142b4 Mon Sep 17 00:00:00 2001
From: Antoine <antoine.dupuis@etudiant.univ-rennes1.fr>
Date: Thu, 13 May 2021 16:30:18 +0200
Subject: [PATCH] Stock

---
 res/bg.jpeg          | Bin 0 -> 24744 bytes
 res/bird.png         | Bin 0 -> 65913 bytes
 res/pipe.png         | Bin 0 -> 69674 bytes
 shaders/bg.frag      |  14 ++++++++
 shaders/bg.vert      |  16 +++++++++
 src/BufferUtils.java |  32 +++++++++++++++++
 src/FileUtils.java   |  27 +++++++++++++++
 src/HelloWorld.java  |   2 +-
 src/Input.java       |  13 +++++++
 src/Level.java       |  40 ++++++++++++++++++++++
 src/Matrix4f.java    |  80 +++++++++++++++++++++++++++++++++++++++++++
 src/Shader.java      |  73 +++++++++++++++++++++++++++++++++++++++
 src/ShaderUtils.java |  57 ++++++++++++++++++++++++++++++
 src/Texture.java     |  57 ++++++++++++++++++++++++++++++
 src/Vector3f.java    |  17 +++++++++
 src/VertexArray.java |  72 ++++++++++++++++++++++++++++++++++++++
 16 files changed, 499 insertions(+), 1 deletion(-)
 create mode 100644 res/bg.jpeg
 create mode 100644 res/bird.png
 create mode 100644 res/pipe.png
 create mode 100644 shaders/bg.frag
 create mode 100644 shaders/bg.vert
 create mode 100644 src/BufferUtils.java
 create mode 100644 src/FileUtils.java
 create mode 100644 src/Input.java
 create mode 100644 src/Level.java
 create mode 100644 src/Matrix4f.java
 create mode 100644 src/Shader.java
 create mode 100644 src/ShaderUtils.java
 create mode 100644 src/Texture.java
 create mode 100644 src/Vector3f.java
 create mode 100644 src/VertexArray.java

diff --git a/res/bg.jpeg b/res/bg.jpeg
new file mode 100644
index 0000000000000000000000000000000000000000..af5a79d2cfa54d871f634ab8244899d0827ffbbb
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diff --git a/shaders/bg.frag b/shaders/bg.frag
new file mode 100644
index 0000000..57415c7
--- /dev/null
+++ b/shaders/bg.frag
@@ -0,0 +1,14 @@
+# version 330 core
+
+layout (location = 0) out vec4 color;
+
+in DATA {
+    vec2 tc;
+} fs_in;
+
+uniform sampler2D tex;
+
+void main()
+{
+    color = texture(tex, fs_in.tc);
+}
\ No newline at end of file
diff --git a/shaders/bg.vert b/shaders/bg.vert
new file mode 100644
index 0000000..eb0ea51
--- /dev/null
+++ b/shaders/bg.vert
@@ -0,0 +1,16 @@
+# version 330 core
+
+layout (location = 0) in vec4 position;
+layout (location = 2) in vec2 tc;
+
+uniform mat4 pr_matrix;
+
+out DATA {
+    vec2 tc;
+} vs_out;
+
+void main()
+{
+    gl_Position = pr_matrix * position;
+    vs_out.tc = tc;
+}
\ No newline at end of file
diff --git a/src/BufferUtils.java b/src/BufferUtils.java
new file mode 100644
index 0000000..b1e8d1f
--- /dev/null
+++ b/src/BufferUtils.java
@@ -0,0 +1,32 @@
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+
+public class BufferUtils {
+
+    private BufferUtils() {
+
+    }
+
+    public static ByteBuffer createByteBuffer(byte[] array){
+        ByteBuffer result = ByteBuffer.allocateDirect(array.length).order(ByteOrder.nativeOrder());
+        result.put(array).flip();
+        return result;
+    }
+
+    public static FloatBuffer createFloatBuffer(float[] array){
+        FloatBuffer result = ByteBuffer.allocateDirect(array.length << 2).order(ByteOrder.nativeOrder()).asFloatBuffer();
+        result.put(array).flip();
+        return result;
+    }
+
+    public static IntBuffer createIntBuffer(int[] array){
+        IntBuffer result = ByteBuffer.allocateDirect(array.length << 2).order(ByteOrder.nativeOrder()).asIntBuffer();
+        result.put(array).flip();
+        return result;
+    }
+
+
+
+}
diff --git a/src/FileUtils.java b/src/FileUtils.java
new file mode 100644
index 0000000..56c672f
--- /dev/null
+++ b/src/FileUtils.java
@@ -0,0 +1,27 @@
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class FileUtils {
+
+    private FileUtils() {
+
+    }
+
+    public static String loadAsString(String file){
+        StringBuilder result = new StringBuilder();
+        try {
+            BufferedReader reader = new BufferedReader(new FileReader(file));
+            String buffer = "";
+            while ((buffer = reader.readLine()) != null) {
+                result.append(buffer +"\n");
+            }
+            reader.close();
+        } catch (IOException e){
+            e.printStackTrace();
+        }
+        return result.toString();
+    }
+
+}
diff --git a/src/HelloWorld.java b/src/HelloWorld.java
index 284f611..046e316 100644
--- a/src/HelloWorld.java
+++ b/src/HelloWorld.java
@@ -93,7 +93,7 @@ public class HelloWorld {
 		GL.createCapabilities();
 
 		// Set the clear color
-		glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
+		glClearColor(1.0f, 0.0f, 1.0f, 0.0f);
 
 		// Run the rendering loop until the user has attempted to close
 		// the window or has pressed the ESCAPE key.
diff --git a/src/Input.java b/src/Input.java
new file mode 100644
index 0000000..26efef9
--- /dev/null
+++ b/src/Input.java
@@ -0,0 +1,13 @@
+import org.lwjgl.glfw.GLFW;
+import org.lwjgl.glfw.GLFWKeyCallback;
+
+public class Input extends GLFWKeyCallback {
+
+    public static boolean[] keys = new boolean[65536];
+
+    @Override
+    public void invoke(long window, int key, int scancode, int action, int mods) {
+        keys[key] = action != GLFW.GLFW_RELEASE;
+
+    }
+}
diff --git a/src/Level.java b/src/Level.java
new file mode 100644
index 0000000..f0a8e44
--- /dev/null
+++ b/src/Level.java
@@ -0,0 +1,40 @@
+import static org.lwjgl.glfw.GLFW.*;
+
+public class Level {
+
+    private VertexArray background;
+    private Texture bgTexture;
+
+    public Level(){
+        float[] vertices = new float[] {
+            -10.0f, -10.0f * 9.0f / 16.0f, 0.0f,
+            -10.0f,  10.0f * 9.0f / 16.0f, 0.0f,
+                0f,  10.0f * 9.0f / 16.0f, 0.0f,
+                0f, -10.0f * 9.0f / 16.0f, 0.0f,
+        };
+
+        byte[] indices = new byte[] {
+                0, 1, 2,
+                2, 3, 0
+        };
+
+        float[] tcs = new float[] {
+                0, 1,
+                0, 0,
+                1, 0,
+                1, 1
+        };
+
+        background = new VertexArray(vertices, indices, tcs);
+        bgTexture = new Texture("res/bg.jpeg");
+    }
+
+    public void render() {
+        bgTexture.bind();
+        Shader.BG.enable();
+        background.render();
+        Shader.BG.disable();
+        bgTexture.unbind();
+    }
+
+}
diff --git a/src/Matrix4f.java b/src/Matrix4f.java
new file mode 100644
index 0000000..bdc9985
--- /dev/null
+++ b/src/Matrix4f.java
@@ -0,0 +1,80 @@
+import java.nio.FloatBuffer;
+
+public class Matrix4f {
+
+    public static final int SIZE = 4 * 4;
+    public float[] elements = new float[4 * 4];
+
+    public Matrix4f(){
+
+    }
+
+    public static Matrix4f identity(){
+        Matrix4f result = new Matrix4f();
+        for (int i = 0; i < SIZE; i++){
+            result.elements[i] = 0.0f;
+        }
+        result.elements[0] = 1.0f;
+        result.elements[1 + 4] = 1.0f;
+        result.elements[2 + 2 * 4] = 1.0f;
+        result.elements[3 + 3 * 4] = 1.0f;
+        return result;
+    }
+
+    public static Matrix4f orthographic(float left, float right, float bottom, float top, float near, float far){
+        Matrix4f result = identity();
+
+        result.elements[0] = 2.0f / (right - left);
+        result.elements[1 + 4] = 2.0f / (top - bottom);
+        result.elements[2 + 2 * 4] = 2.0f / (near - far);
+
+        result.elements[3 * 4] = (left + right) / (left - right);
+        result.elements[1 + 3 * 4] = (bottom + top) / (bottom - top);
+        result.elements[2 + 3 * 4] = (far + near) / (far - near);
+
+        return result;
+    }
+
+    public static Matrix4f translate(Vector3f vector){
+        Matrix4f result= identity();
+        result.elements[0 + 3*4] = vector.x;
+        result.elements[1 + 3*4] = vector.y;
+        result.elements[2 + 3*4] = vector.z;
+
+        return result;
+    }
+
+    public static Matrix4f rotate(float angle){
+        Matrix4f result = identity();
+        float r = (float) Math.toRadians(angle);
+        float cos = (float) Math.cos(angle);
+        float sin = (float) Math.sin(angle);
+
+        result.elements[0 + 0 * 4] = cos;
+        result.elements[1 + 0 * 4] = sin;
+
+        result.elements[0 + 1 * 4] = -sin;
+        result.elements[1 + 1 * 4] = cos;
+
+        return result;
+    }
+
+    public Matrix4f multiply(Matrix4f matrix){
+        Matrix4f result = new Matrix4f();
+        for (int y = 0; y< 4; y++){
+            for (int x = 0; x< 4; x++){
+                float sum = 0.0f;
+                for (int e = 0; e< 4; e++){
+                    sum += this.elements[x + e * 4] * matrix.elements[e + y * 4];
+                }
+                result.elements[x + y * 4] = sum;
+            }
+        }
+        return result;
+    }
+
+    public FloatBuffer toFloatBuffer() {
+        return BufferUtils.createFloatBuffer(elements);
+    }
+
+}
diff --git a/src/Shader.java b/src/Shader.java
new file mode 100644
index 0000000..c7173f1
--- /dev/null
+++ b/src/Shader.java
@@ -0,0 +1,73 @@
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.lwjgl.opengl.GL20.*;
+
+public class Shader {
+
+    public static final int VERTEX_ATTRIB = 0;
+    public static final int TCOORD_ATTRIB = 1;
+
+    public static Shader BG;
+
+    private boolean enabled = false;
+
+    //Identifiant du programme resultat de la compilation des shaders
+    private final int ID;
+    private Map<String, Integer> locationCache = new HashMap<String, Integer>();
+
+    /*
+    Crée le fragment et le vertex shader les lie dans un programme dont il renvoie l'identifiant.
+     */
+    public Shader(String vertex, String fragment) {
+        ID = ShaderUtils.load(vertex, fragment);
+    }
+
+    public static void loadAll(){
+        BG = new Shader("shaders/bg.vert", "shaders/bg.frag");
+    }
+
+    public int getUniform(String name){
+        if (locationCache.containsKey(name)) return locationCache.get(name);
+        int result = glGetUniformLocation(ID, name);
+        if (result == -1) System.err.println("Could not find uniform variable " + name);
+        else locationCache.put(name, result);
+        return result;
+    }
+
+    public void setUniform1i(String name, int value) {
+        if (!enabled) enable();
+        glUniform1i(getUniform(name), value);
+    }
+
+    public void setUniform1f(String name, float value) {
+        if (!enabled) enable();
+        glUniform1f(getUniform(name), value);
+    }
+
+    public void setUniform2f(String name, float x, float y) {
+        if (!enabled) enable();
+        glUniform2f(getUniform(name), x, y);
+    }
+
+    public void setUniform3f(String name, Vector3f vector) {
+        if (!enabled) enable();
+        glUniform3f(getUniform(name), vector.x, vector.y, vector.z);
+    }
+
+    public void setUniformMat4f(String name, Matrix4f matrix){
+        if (!enabled) enable();
+        glUniformMatrix4fv(getUniform(name), false, matrix.toFloatBuffer());
+    }
+
+    public void enable() {
+        glUseProgram(ID);
+        enabled = true;
+    }
+
+    public void disable() {
+        glUseProgram(0);
+        enabled = false;
+    }
+
+}
diff --git a/src/ShaderUtils.java b/src/ShaderUtils.java
new file mode 100644
index 0000000..625c84c
--- /dev/null
+++ b/src/ShaderUtils.java
@@ -0,0 +1,57 @@
+
+import static org.lwjgl.opengl.GL11.*;
+import static org.lwjgl.opengl.GL20.*;
+
+public class ShaderUtils {
+
+    private ShaderUtils(){
+
+    }
+
+    public static int load(String vertPath, String fragPath){
+        String vert = FileUtils.loadAsString(vertPath);
+        String frag = FileUtils.loadAsString(fragPath);
+        return create(vert, frag);
+    }
+
+    public static int create(String vert, String frag){
+        // On crée et compile le vertex et le fragment shader
+        int vertID = glCreateShader(GL_VERTEX_SHADER);
+        int fragID = glCreateShader(GL_FRAGMENT_SHADER);
+        glShaderSource(vertID, vert);
+        glShaderSource(fragID, frag);
+
+        glCompileShader(vertID);
+        if (glGetShaderi(vertID, GL_COMPILE_STATUS) == GL_FALSE){
+            System.err.println("Failed to compile vertex shader");
+            System.err.println(glGetShaderInfoLog(vertID));
+            return -1;
+        }
+
+        glCompileShader(fragID);
+        if (glGetShaderi(fragID, GL_COMPILE_STATUS) == GL_FALSE){
+            System.err.println("Failed to compile fragment shader");
+            System.err.println(glGetShaderInfoLog(fragID));
+            return -1;
+        }
+        //on lie les shaders au programme
+        int program = glCreateProgram();
+        glAttachShader(program, vertID);
+        glAttachShader(program, fragID);
+        glLinkProgram(program);
+
+        if(glGetProgrami(program, GL_LINK_STATUS) == GL_FALSE) {
+            System.err.println("Failed to link vertex and fragment shader");
+            System.err.println(glGetShaderInfoLog(program));
+            return -1;
+        }
+
+        glValidateProgram(program);
+
+        glDeleteShader(vertID);
+        glDeleteShader(fragID);
+
+        return program;
+    }
+
+}
diff --git a/src/Texture.java b/src/Texture.java
new file mode 100644
index 0000000..175210a
--- /dev/null
+++ b/src/Texture.java
@@ -0,0 +1,57 @@
+import java.awt.image.BufferedImage;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+
+import static org.lwjgl.opengl.GL11.*;
+
+public class Texture {
+
+    private int width, height;
+    private int texture;
+
+    public Texture(String path) {
+        texture = load(path);
+    }
+
+    private int load(String path) {
+        int[] pixels = null;
+        try {
+            BufferedImage image = ImageIO.read(new FileInputStream(path));
+            width = image.getWidth();
+            height = image.getHeight();
+            pixels = new int[width * height];
+            image.getRGB(0, 0, width, height, pixels, 0, width);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        int[] data = new int[width * height];
+        for (int i = 0; i < width * height; i++) {
+            int a = (pixels[i] & 0xff000000) >> 24;
+            int r = (pixels[i] & 0xff0000) >> 16;
+            int g = (pixels[i] & 0xff00) >> 8;
+            int b = (pixels[i] & 0xff);
+
+            data[i] = a << 24 | b << 16 | g << 8 | r;
+        }
+
+        int result = glGenTextures();
+        glBindTexture(GL_TEXTURE_2D, result);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, BufferUtils.createIntBuffer(data));
+        glBindTexture(GL_TEXTURE_2D, 0);
+        return result;
+    }
+
+    public void bind() {
+        glBindTexture(GL_TEXTURE_2D, texture);
+    }
+
+    public void unbind() {
+        glBindTexture(GL_TEXTURE_2D, 0);
+    }
+
+}
\ No newline at end of file
diff --git a/src/Vector3f.java b/src/Vector3f.java
new file mode 100644
index 0000000..3eb454e
--- /dev/null
+++ b/src/Vector3f.java
@@ -0,0 +1,17 @@
+public class Vector3f {
+
+    public float x, y, z;
+
+    public Vector3f(){
+        x = 0.0f;
+        y = 0.0f;
+        z = 0.0f;
+    }
+
+    public Vector3f(float x, float y, float z){
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+}
diff --git a/src/VertexArray.java b/src/VertexArray.java
new file mode 100644
index 0000000..e3594fb
--- /dev/null
+++ b/src/VertexArray.java
@@ -0,0 +1,72 @@
+import static org.lwjgl.opengl.GL11.*;
+import static org.lwjgl.opengl.GL15.*;
+import static org.lwjgl.opengl.GL30.*;
+
+
+public class VertexArray {
+
+    private int vao, vbo, ibo, tbo;
+    private int count;
+
+    /*
+    Donne la description de l'agencement des differents buffer
+     */
+    public VertexArray(float[] vertices, byte[] indices, float[] textureCoordinates){
+        count = indices.length;
+
+        /*
+        VERTEX ARRAY OBJECT
+         */
+        vao = glGenVertexArrays();
+        glBindVertexArray(vao);
+
+        /*
+        VERTEX BUFFER OBJECT
+         */
+        vbo = glGenBuffers();
+        glBindBuffer(GL_ARRAY_BUFFER, vbo);
+        glBufferData(GL_ARRAY_BUFFER, BufferUtils.createFloatBuffer(vertices), GL_STATIC_DRAW);
+        glVertexAttribPointer(Shader.VERTEX_ATTRIB, 3, GL_FLOAT, false, 0, 0);
+        glEnableVertexAttribArray(Shader.VERTEX_ATTRIB);
+
+        /*
+        TEXTURE BUFFER OBJECT
+         */
+        tbo = glGenBuffers();
+        glBindBuffer(GL_ARRAY_BUFFER, tbo);
+        glBufferData(GL_ARRAY_BUFFER, BufferUtils.createFloatBuffer(textureCoordinates), GL_STATIC_DRAW);
+        glVertexAttribPointer(Shader.TCOORD_ATTRIB, 2, GL_FLOAT, false, 0, 0);
+        glEnableVertexAttribArray(Shader.TCOORD_ATTRIB);
+
+        /*
+        INDICES BUFFER OBJECT OR ELEMENT BUFFER OBJECT
+         */
+        ibo = glGenBuffers();
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, BufferUtils.createByteBuffer(indices), GL_STATIC_DRAW);
+
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+        glBindVertexArray(0);
+    }
+
+    public void bind(){
+        glBindVertexArray(vao);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+    }
+
+    public void unbind(){
+        glBindVertexArray(0);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    }
+
+    public void draw(){
+        glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_BYTE, 0);
+    }
+
+    public void render(){
+        bind();
+        draw();
+    }
+
+}