drawing sprite back to front

shaders/ObjectGlTex/frag.glsl

@@ -8,5 +8,5 @@ uniform sampler2D texture1;
 
 void main()
 {
-    FragColor = texture(texture1, vec2(texCoord.y, -texCoord.x));
+    FragColor = texture(texture1, vec2(-texCoord.y, -texCoord.x));
 }

shaders/ObjectGlTexColor/frag.glsl

@@ -9,5 +9,5 @@ uniform sampler2D texture1;
 
 void main()
 {
-    FragColor = texture(texture1, vec2(texCoord.y, -texCoord.x)) * color;
+    FragColor = texture(texture1, vec2(-texCoord.y, -texCoord.x)) * color;
 }

src/engine/Engine.java

@@ -7,6 +7,7 @@ import org.lwjgl.glfw.GLFWVidMode;
 import org.lwjgl.opengl.GL;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import static org.lwjgl.glfw.GLFW.*;
@@ -93,6 +94,8 @@ public class Engine {
         glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
+        objectsGl.sort(new SortZ());
+        // TODO trié en fonction de la distance z sinon bug d'affichage
         for (ObjectGl objectGl : objectsGl) {
             objectGl.render();
         }
@@ -104,7 +107,6 @@ public class Engine {
 
     public void add_objectGl(ObjectGl obj){
         objectsGl.add(obj);
-        // TODO trié en fonction de la distance z sinon bug d'affichage
     }
 
     public void remove_objectGl(ObjectGl obj){
@@ -140,18 +142,18 @@ public class Engine {
 
         // Add objects to render
         List<String> path = new ArrayList<>();
-        path.add("textures/awesomeface.png");
+        path.add("textures/zangief_sprite.png");
 
-        ObjectGl smiley = new ObjectGlTex(-0.5f,0.5f,0.0f,500.0f,500.0f, path, Primitive.stdTexWrap);
+        ObjectGl smiley = new ObjectGlTex(-200.5f,200.5f,0.0f,320.0f*6,578.0f*6, path, Primitive.stdTexWrap);
         engine.add_objectGl(smiley);
-        smiley.translate(new Vector3f(-2.5f,0.0f,0.0f));
+        smiley.translate(new Vector3f(-600.0f,0.0f,9.0f));
 
         ObjectGl smiley2 = new ObjectGlTex(-0.5f,0.5f,0.0f,500.0f,500.0f, path, Primitive.stdTexWrap);
         engine.add_objectGl(smiley2);
-        smiley2.translate(new Vector3f(0.0f,0.0f,10.0f));
+        smiley2.translate(new Vector3f(0.0f,0.0f,5.0f));
 
         long timer = System.currentTimeMillis();
-        long lastFrame = System.currentTimeMillis();
+        long lastFrame;
         int frame = 0;
         boolean nextFrame = false;
 
@@ -160,7 +162,7 @@ public class Engine {
             double time = glfwGetTime();
             lastFrame = System.currentTimeMillis();
 
-            smiley.translate(new Vector3f( (float) Math.sin(time), (float) Math.cos(time), 0.0f));
+            smiley.translate(new Vector3f( (float) Math.sin(time)*5, (float) Math.cos(time)*5, 0.0f));
 
             smiley2.rotateZ(0.8f);
 

src/engine/object/ObjectGl.java

@@ -6,6 +6,8 @@ import engine.graphics.Shader;
 import engine.math.Matrix4f;
 import engine.math.Vector3f;
 
+import java.util.Comparator;
+
 /**
  *
  */
@@ -18,6 +20,8 @@ public class ObjectGl {
     public static Matrix4f projection;
     public static Matrix4f view;
 
+    public float zPos;
+
     public ObjectGl(){
 
     }
@@ -26,6 +30,7 @@ public class ObjectGl {
         this.vertexArray = new VertexArray(Primitive.createRectangle(x, y, z, h, w), Primitive.rectangle_indices, null, null);
         this.transform = Matrix4f.identity();
         this.shader = new Shader("shaders/ObjectGl/vert.glsl","shaders/ObjectGl/frag.glsl");
+        this.zPos = z;
     }
 
     public void resetTransform(){
@@ -34,6 +39,7 @@ public class ObjectGl {
 
     public void translate(Vector3f vec){
         this.transform = this.transform.multiply(Matrix4f.translate(vec));
+        this.zPos += vec.z;
     }
 
     public void scale(Vector3f vec){

src/engine/object/ObjectGlColor.java

@@ -11,5 +11,6 @@ public class ObjectGlColor extends ObjectGl{
         this.vertexArray = new VertexArray(Primitive.createRectangle(x, y, z, h, w), Primitive.rectangle_indices, color, null);
         this.transform = Matrix4f.identity();
         this.shader = new Shader("shaders/ObjectGlColor/vert.glsl","shaders/ObjectGlColor/frag.glsl");
+        this.zPos = z;
     }
 }

src/engine/object/ObjectGlTex.java

@@ -22,6 +22,7 @@ public class ObjectGlTex extends ObjectGl{
         this.vertexArray = new VertexArray(Primitive.createRectangle(x, y, z, h, w), Primitive.rectangle_indices, null, texCoord);
         this.transform = Matrix4f.identity();
         this.shader = new Shader("shaders/ObjectGlTex/vert.glsl","shaders/ObjectGlTex/frag.glsl");
+        this.zPos = z;
 
         this.textures = new ArrayList<>();
         int count = 0;

src/engine/object/ObjectGlTexColor.java

@@ -16,6 +16,7 @@ public class ObjectGlTexColor extends ObjectGlTex{
         this.vertexArray = new VertexArray(Primitive.createRectangle(x, y, z, h, w), Primitive.rectangle_indices, color, texCoord);
         this.transform = Matrix4f.identity();
         this.shader = new Shader("shaders/ObjectGlTexColor/vert.glsl","shaders/ObjectGlTexColor/frag.glsl");
+        this.zPos = z;
 
         this.textures = new ArrayList<>();
         int count = 0;

src/engine/object/SortZ.java

@@ -0,0 +1,11 @@
+package engine.object;
+
+import java.util.Comparator;
+
+public class SortZ implements Comparator<ObjectGl>
+{
+    public int compare(ObjectGl a, ObjectGl b)
+    {
+        return (int) (a.zPos - b.zPos);
+    }
+}