Update

Author: FabulousCodingFox

.idea/discord.xml

@@ -30,8 +30,10 @@
         <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl</artifactId></dependency>
         <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl-glfw</artifactId></dependency>
         <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl-opengl</artifactId></dependency>
+        <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl-stb</artifactId></dependency>
         <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl</artifactId><classifier>natives-windows</classifier></dependency>
         <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl-glfw</artifactId><classifier>natives-windows</classifier></dependency>
+        <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl-stb</artifactId><classifier>natives-windows</classifier></dependency>
         <dependency><groupId>org.lwjgl</groupId><artifactId>lwjgl-opengl</artifactId><classifier>natives-windows</classifier></dependency>
         <dependency><groupId>org.joml</groupId><artifactId>joml</artifactId><version>1.10.5</version></dependency>
     </dependencies>

pom.xml

@@ -34,7 +34,7 @@ public class Renderer {
     private int FRAMEBUFFER_COLORBUFFER;
     private int FRAMEBUFFER_RENDERBUFFER1;
 
-    private final Shader SHADER_GRID_DEBUG, SHADER_POST_DEBUG;
+    private final Shader SHADER_GRID, SHADER_POST;
 
     private int VAO_WORLD;
     private int vaosize;
@@ -141,6 +141,8 @@ public Renderer(int windowWidth, int windowHeight, String windowTitle){
 
         GL.createCapabilities();
 
+        glEnable(GL_TEXTURE_3D);
+
         float[] quadVertices = {
                 -1.0f,  1.0f,
                 -1.0f, -1.0f,
@@ -184,12 +186,12 @@ public Renderer(int windowWidth, int windowHeight, String windowTitle){
 
         System.out.println("Initializing Shaders...");
         System.out.println("SHADER_GRID_DEBUG");
-        SHADER_GRID_DEBUG = new Shader(
+        SHADER_GRID = new Shader(
                 "shader/debug/SHADER_GRID_DEBUG.vert",
                 "shader/debug/SHADER_GRID_DEBUG.frag"
         );
         System.out.println("SHADER_POST_DEBUG");
-        SHADER_POST_DEBUG = new Shader(
+        SHADER_POST = new Shader(
                 "shader/debug/SHADER_POST_DEBUG.vert",
                 "shader/debug/SHADER_POST_DEBUG.frag"
         );
@@ -266,6 +268,7 @@ public Renderer(int windowWidth, int windowHeight, String windowTitle){
         glEnableVertexAttribArray(1); // UV
         VBO_WORLD.add(v);
 
+        Texture3D voxelData = new Texture3D("models/debug", 2);
     }
 
     public boolean shouldClose(){
@@ -292,10 +295,10 @@ public void render(Vector3f position, Vector3f direction){
 
         viewMatrix = getViewMatrix(position, direction);
 
-        SHADER_GRID_DEBUG.use();
-        SHADER_GRID_DEBUG.setMatrix4f("projection", projectionMatrix);
-        SHADER_GRID_DEBUG.setMatrix4f("view", viewMatrix);
-        SHADER_GRID_DEBUG.setMatrix4f("model", modelMatrix);
+        SHADER_GRID.use();
+        SHADER_GRID.setMatrix4f("projection", projectionMatrix);
+        SHADER_GRID.setMatrix4f("view", viewMatrix);
+        SHADER_GRID.setMatrix4f("model", modelMatrix);
 
         glBindBuffer(GL_ARRAY_BUFFER, VAO_WORLD);
         glDrawArrays(GL_TRIANGLES, 0, vaosize);
@@ -313,8 +316,8 @@ public void render(Vector3f position, Vector3f direction){
 
             //glPolygonMode(GL_FRONT_FACE, GL_LINE);
 
-            SHADER_POST_DEBUG.use();
-            SHADER_POST_DEBUG.setVector2f("iResolution", new Vector2f(windowWidth, windowHeight));
+            SHADER_POST.use();
+            SHADER_POST.setVector2f("iResolution", new Vector2f(windowWidth, windowHeight));
             glBindVertexArray(VAO_POST);
             glActiveTexture(GL_TEXTURE0);
             glBindTexture(GL_TEXTURE_2D, FRAMEBUFFER_COLORBUFFER);

src/main/java/de/fabulousfox/engine/Renderer.java

@@ -0,0 +1,63 @@
+package de.fabulousfox.engine;
+
+import org.lwjgl.BufferUtils;
+
+import java.io.File;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.util.Objects;
+
+import static org.lwjgl.opengl.GL33.*;
+import static org.lwjgl.stb.STBImage.*;
+
+public class Texture3D {
+    private int texID;
+
+    public Texture3D(String folderpath, int texChannel) {
+        glActiveTexture(texChannel);
+        texID = glGenTextures();
+        glBindTexture(GL_TEXTURE_3D, texID);
+
+        // set the texture wrapping parameters
+        glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+
+        // set texture filtering parameters
+        glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+        String[] files = new File(getClass().getResource(folderpath).getPath()).list();
+
+        int WIDTH = 8;
+        int HEIGHT = 8;
+        int DEPTH = 8;
+
+        glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB8, WIDTH, HEIGHT, DEPTH, 0, GL_RGBA, GL_UNSIGNED_BYTE, (ByteBuffer) null);
+
+        for(int i = 0; i < files.length; i++){
+            String absolutePath = Objects.requireNonNull(getClass().getClassLoader().getResource(
+                    folderpath + File.separator + i + ".png"
+            )).getPath().substring(1);
+            if(!System.getProperty("os.name").contains("Windows")){
+                absolutePath = File.separator + absolutePath;
+            }
+            stbi_set_flip_vertically_on_load(true);
+            IntBuffer x = BufferUtils.createIntBuffer(1);
+            IntBuffer y = BufferUtils.createIntBuffer(1);
+            IntBuffer channels = BufferUtils.createIntBuffer(1);
+            ByteBuffer image = stbi_load(absolutePath, x, y, channels, STBI_rgb_alpha);
+            if (image == null) {
+                throw new IllegalStateException("Could not decode image file ["+ absolutePath +"]: ["+ stbi_failure_reason() +"]");
+            }
+
+            glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, i, WIDTH, HEIGHT, 1, GL_RGBA, GL_UNSIGNED_BYTE, image);
+
+            stbi_image_free(image);
+        }
+    }
+
+    public int get() {
+        return texID;
+    }
+}