From 2ee2a261a190325d587cb78e517907dcf552ccc8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20GUEZO?= <guezo.loic@gmail.com>
Date: Mon, 25 Mar 2024 21:41:56 +0100
Subject: [PATCH] add graphics buffers

---
 .gitignore            |   3 ++-
 src/Main.class        | Bin 1012 -> 0 bytes
 src/Main.java         |   1 -
 src/graphics/EBO.java |  24 ++++++++++++++++++++++-
 src/graphics/VAO.java |  43 +++++++++++++++++++++++++++++++++++++++++-
 src/graphics/VBO.java |  25 +++++++++++++++++++++++-
 6 files changed, 91 insertions(+), 5 deletions(-)
 delete mode 100644 src/Main.class

diff --git a/.gitignore b/.gitignore
index 496ee2c..b54392d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-.DS_Store
\ No newline at end of file
+.DS_Store
+*.class
diff --git a/src/Main.class b/src/Main.class
deleted file mode 100644
index fb873830f34a3e3931af190ea99f8823eae23c8c..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/src/Main.java b/src/Main.java
index ac2425e..519b83a 100644
--- a/src/Main.java
+++ b/src/Main.java
@@ -15,7 +15,6 @@ import static org.lwjgl.opengl.GL11.*;
 import static org.lwjgl.system.MemoryStack.*;
 import static org.lwjgl.system.MemoryUtil.*;
 
-
 public class Main {
     public static void main(String[] args) {
         if(!GLFW.glfwInit()) {
diff --git a/src/graphics/EBO.java b/src/graphics/EBO.java
index d65caab..8691d88 100644
--- a/src/graphics/EBO.java
+++ b/src/graphics/EBO.java
@@ -1,5 +1,27 @@
 package graphics;
 
+import org.lwjgl.opengl.GL15;
+
 public class EBO {
-    
+    private int id;
+
+    public EBO(int[] indices) {
+        this.id = GL15.glGenBuffers();
+        GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, this.id);
+        GL15.glBufferData(GL15.GL_ELEMENT_ARRAY_BUFFER, indices, GL15.GL_STATIC_DRAW);
+        bind();
+    }
+
+    public void cleanup() {
+        unbind();
+        GL15.glDeleteBuffers(this.id);
+    }
+
+    public void bind() {
+        GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, (int)this.id);
+    }
+
+    public void unbind() {
+        GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, 0);
+    }
 }
diff --git a/src/graphics/VAO.java b/src/graphics/VAO.java
index 28e058f..ec8afec 100644
--- a/src/graphics/VAO.java
+++ b/src/graphics/VAO.java
@@ -1,5 +1,46 @@
 package graphics;
 
+import static org.lwjgl.opengl.GL11.glDrawArrays;
+import static org.lwjgl.opengl.GL11.glDrawElements;
+
+import org.lwjgl.opengl.GL30;
+
 public class VAO {
-    
+    private int id;
+
+    public VAO() {
+        this.id = GL30.glGenVertexArrays();
+        bind();
+    }
+
+    public void cleanup() {
+        unbind();
+        GL30.glDeleteVertexArrays(id);
+    }
+
+    public void bind() {
+        GL30.glBindVertexArray(this.id);
+    }
+
+    public void unbind() {
+        GL30.glBindVertexArray(0);
+    }
+
+    public void setAttributePointer(int index, int size, int type, int stride, long offset) {
+        GL30.glEnableVertexAttribArray(index);
+        GL30.glVertexAttribPointer(index, size, type, false, stride, offset);
+    }
+
+    public void drawElement(int mode, int count, int type, long indices) {
+        bind();
+
+        glDrawElements(mode, count, type, indices);
+        unbind();
+    }
+
+    public void drawElementIndices(int mode, int first, int count) {
+        bind();
+        glDrawArrays(mode, first, count);
+        unbind();
+    }
 }
diff --git a/src/graphics/VBO.java b/src/graphics/VBO.java
index d8331e8..0b0ef65 100644
--- a/src/graphics/VBO.java
+++ b/src/graphics/VBO.java
@@ -1,5 +1,28 @@
 package graphics;
 
+import org.lwjgl.opengl.GL15;
+
 public class VBO {
-    
+    private int id;
+
+    public VBO(float[] vertices) {
+        this.id = GL15.glGenBuffers();
+        GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, this.id);
+        GL15.glBufferData(GL15.GL_ARRAY_BUFFER, vertices, GL15.GL_STATIC_DRAW);
+
+        bind();
+    }
+
+    public void cleanup() {
+        unbind();
+        GL15.glDeleteBuffers(this.id);
+    }
+
+    public void bind() {
+        GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, this.id);
+    }
+
+    public void unbind() {
+        GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
+    }
 }