Can't get light to turn on with gl.glEnable - java

I'm writing a java program with opengl and I'm trying to get it where the user would select something like lighting on in a JMenu and then it would turn the lighting on in the house/barn... I have a method called LightOn that I put gl.glEnable(gl.GL_LIGHT0); but it just doesn't seem to turn on when I call it from the action performed... Is there something I'm missing from my code that I'm supposed to use instead since I have tried it with a boolean.. So the boolean starts off as false and when the JMenuItem is clicked the actionPerformed will turn the boolean to true and call the method LightOn. In the display method I have what the light is supposed to be
Snippet of code in display method for lighting:
float [] whiteLight = {1.0f, 1.0f, 1.0f, 1.0f};
float [] ambientLight = {0.1f, 0.1f, 0.1f, 1.0f}; //default
gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_DIFFUSE, whiteLight,0);
gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_SPECULAR, whiteLight,0);
gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_AMBIENT, ambientLight,0);
float [] lightPosition = {25, 25, 25, 1};
gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_POSITION, lightPosition,0);
float [] diffuse_mp = {1.0f,0.0f,0.0f,1.0f};//red
//gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL2.GL_SPECULAR, ambientLight,0);
gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL2.GL_DIFFUSE, diffuse_mp,0);
boolean light = false;
public static void LightOn(GLAutoDrawable drawable)
{
GL2 gl = drawable.getGL().getGL2();
boolean light = true;
//gl.glEnable(GLLightingFunc.GL_LIGHTING);
gl.glEnable(GLLightingFunc.GL_LIGHT0);
}
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("Lighting On"))
{
light = true;
LightOn(canvas);
System.out.println("Light on");
}
}

Related

LWJGL: JVM crashing with error EXCEPTION_ACCESS_VIOLATION

While trying to set up a minimal reproducable example using LWJGL because my original question was closed, I ran into a problem I didn't have originally (Originally it was just not displaying), which is that the JVM now crashes with an EXCEPTION_ACCESS_VIOLATION error during the glDrawArrays() call.
I don't know what could be causing this, but I've tried for example initializing the vertex attribute pointers each frame. There is also no debug information or errors logged, while I did set up an error callback and I think a debug message callback.
All of the code:
import org.lwjgl.glfw.GLFW;
import org.lwjgl.glfw.GLFWErrorCallback;
import org.lwjgl.opengl.GL;
import org.lwjgl.opengl.GL30;
import org.lwjgl.opengl.GLUtil;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
public class MinimalExample {
private static String readResource(String res) {
try {
InputStream is = MinimalExample.class.getResourceAsStream(res);
String s = new String(is.readAllBytes(), StandardCharsets.UTF_8);
is.close();
return s;
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
// vertex data buffer
private static final ByteBuffer buf = ByteBuffer.allocateDirect(4096);
// shader program
static int program;
// render objects
static int vao;
static int vbo;
public static void main(String[] args) {
// set buffer limit
buf.limit(4096);
// init glfw and create window
GLFW.glfwInit();
long window = GLFW.glfwCreateWindow(500, 500, "Hello", 0, 0);
// create GL
GLFW.glfwMakeContextCurrent(window);
GL.createCapabilities();
GLUtil.setupDebugMessageCallback(System.out);
GLFW.glfwSetErrorCallback(GLFWErrorCallback.createPrint(System.out));
// create vertex objects
vao = GL30.glGenVertexArrays();
vbo = GL30.glGenBuffers();
GL30.glBindVertexArray(vao);
GL30.glVertexAttribPointer(0, 3, GL30.GL_FLOAT, false, 7 * 4, 0);
GL30.glVertexAttribPointer(1, 4, GL30.GL_FLOAT, false, 7 * 4, 0);
GL30.glEnableVertexAttribArray(0);
GL30.glEnableVertexAttribArray(1);
GL30.glBindVertexArray(0);
// compile and link shaders
int vertexShader = GL30.glCreateShader(GL30.GL_VERTEX_SHADER);
int fragmentShader = GL30.glCreateShader(GL30.GL_FRAGMENT_SHADER);
GL30.glShaderSource(vertexShader, readResource("/test.vsh"));
GL30.glShaderSource(fragmentShader, readResource("/test.fsh"));
GL30.glCompileShader(vertexShader);
GL30.glCompileShader(fragmentShader);
program = GL30.glCreateProgram();
GL30.glAttachShader(program, vertexShader);
GL30.glAttachShader(program, fragmentShader);
GL30.glLinkProgram(program);
// render loop
while (!GLFW.glfwWindowShouldClose(window)) {
// poll events
GLFW.glfwPollEvents();
// clear screen
GL30.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
GL30.glClear(GL30.GL_COLOR_BUFFER_BIT);
// render
render();
// swap buffers
GLFW.glfwSwapBuffers(window);
}
}
static void render() {
// put vertex data
// manual to simulate graphics library
putVec3(0.25f, 0.25f, 1f); putVec4(1.0f, 0.0f, 0.0f, 1.0f);
putVec3(0.75f, 0.25f, 1f); putVec4(0.0f, 1.0f, 0.0f, 1.0f);
putVec3(0.50f, 0.75f, 1f); putVec4(0.0f, 0.0f, 1.0f, 1.0f);
// bind program
GL30.glUseProgram(program);
// bind vertex array
GL30.glBindVertexArray(vao);
GL30.glEnableVertexAttribArray(0);
GL30.glEnableVertexAttribArray(1);
// upload graphics data and draw
GL30.glBindBuffer(GL30.GL_ARRAY_BUFFER, vbo);
GL30.glBufferData(GL30.GL_ARRAY_BUFFER, buf, GL30.GL_STATIC_DRAW);
GL30.glDrawArrays(GL30.GL_TRIANGLES, 0, 3);
GL30.glBindBuffer(GL30.GL_ARRAY_BUFFER, 0);
GL30.glBindVertexArray(0);
// reset vertex data buffer
buf.position(0);
}
//////////////////////////////////////////
static void putVec3(float x, float y, float z) {
buf.putFloat(x).putFloat(y).putFloat(z);
}
static void putVec4(float x, float y, float z, float w) {
buf.putFloat(x).putFloat(y).putFloat(z).putFloat(z);
}
}
The full JVM error log (hs_err_pidX.log): pastes.dev
For context, I'm running this with JDK 17 from IntelliJ directly. Here is the build.gradle file if you want to check the dependencies: build.gradle (GitHub)

Why doesn't SpriteBatch draw anything (LibGdx)?

This is from day 6 of the flappy bird recreation tutorial
-http://www.kilobolt.com/day-6-adding-graphics---welcome-to-the-necropolis.html
Here is the image file i am using for texture in my game. It is a 256px x 64px .png file.
Here is the class that I used for loading the texture and the specific TextureRegion(part of the texure) that I want the SpriteBatch to draw.
public class AssetLoader {
public static Texture texture;
public static TextureRegion bg;
public static void load() {
texture = new Texture(Gdx.files.internal("data/texture.png"));
bg = new TextureRegion(texture, 0, 0, 136, 43);
}
}
And I call AssertLoader.load(), along with setting up game screen from
public class MyGdxGame extends Game{
#Override
public void create() {
AssetLoader.load();
setScreen(new GameScreen());
}
}
And inside GameScreen.java
public class GameScreen implements Screen {
//delegate render task
private GameRenderer renderer;
public GameScreen() {
float screenHeight = Gdx.graphics.getHeight();
float screenWidth = Gdx.graphics.getWidth();
float gameWidth = 136;
float gameHeight = screenHeight / (screenWidth / gameWidth);
renderer = new GameRenderer((int)gameHeight);
}
}
And inside GameRederer, the class I delegate to render the game
public class GameRenderer {
private int gameHeight;
private SpriteBatch batch;
private OrthographicCamera cam;
public GameRenderer(int gameHeight) {
this.gameHeight = gameHeight;
cam = new OrthographicCamera();
batch = new SpriteBatch();
batch.setProjectionMatrix(cam.combined);
cam.setToOrtho(true, 136, gameHeight);
}
public void render() {
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
batch.begin();
batch.disableBlending();
batch.draw(AssetLoader.bg, 0, (gameHeight/2) + 23, 136, 43);
batch.end()
}
}
What I get when I run the desktop version of the game is the black screen shown above(black because i set the background to black with these lines of code
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
Does anyone know why the SpritchBatch drawing isn't showing up? I extracted the texture portion of the texture I wanted with this line of code(starts from 0,0, width of 136, height of 43) - used GIMP - to find out portion to cut.
bg = new TextureRegion(texture, 0, 0, 136, 43);
I also put a few log statements(removed them from view) to ensure that before drawing, bg's width and height were set correctly, which they were. And the issue can't be game height because I used a print statement and found that to be 204 which means that this expression, (gameHeight/2) + 23 will evaluate to 125 which is in bounds between 0 and game height.
I checked out other threads as well.
My issue can't be libgdx spritebatch not rendering textures because the SpriteBatch should overwrite the background.
And it can't be LibGDX: Android SpriteBatch not drawing because i am running mine on desktop, not andorid.
could be that you have to first put cam.setToOrtho(true, 136, gameHeight);before the batch, so I can not confirm hopefully help
public GameRenderer(int gameHeight) {
this.gameHeight = gameHeight;
cam = new OrthographicCamera();
batch = new SpriteBatch();
cam.setToOrtho(true, 136, gameHeight);
batch.setProjectionMatrix(cam.combined);
}
If anyone's having a similar issue, the way I solved the problem was to call
batch.setProjectionMatrix(cam.combined);
after
cam.setToOrtho(true, 136, gameHeight);
Which didn't really make sense to me because it's still the same Matrix4 in Camera.java, that is
public final Matrix4 combined = new Matrix4();
Was hoping someone else could clarify that.

Setting the applcation to use "y-down" in LibGDX

http://badlogicgames.com/forum/viewtopic.php?f=11&t=2447
http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/OrthographicCamera.html
There's hundreds of other links I could show you that I've looked at, but it's just not worth it because they all say the same thing.
public class InGame implements Screen {
SpriteBatch batch;
GameWorld world;
OrthographicCamera camera;
#Override
public void show() {
batch = new SpriteBatch();
world = new GameWorld();
camera = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
camera.setToOrtho(true, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
}
#Override
public void render(float delta) {
Gdx.gl.glClearColor(0f, 0f, 0f, 1f);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
camera.update();
batch.setProjectionMatrix(camera.combined);
batch.begin();
world.render(batch, delta);
batch.end();
}
}
What am I doing wrong? WHY is my world still being rendered with the 0,0 being at the bottom right. The math behind this while trying to work on my Tile-System is driving me absolutely insane.
World->Render
public void render(SpriteBatch batch, float delta) {
for(int xAxis = 0; xAxis < worldColumns; xAxis++) {
for(int yAxis = 0; yAxis < worldRows; yAxis++) {
tiles[xAxis][yAxis].render(batch, delta);
}
}
}
WorldTile->Render
public void render(SpriteBatch batch, float delta) {
myShape.begin(ShapeType.Filled);
myShape.setColor(tileColor);
myShape.rect(pos.getX(), pos.getY(), TILE_WIDTH, TILE_HEIGHT);
myShape.end();
}
The "pos" is the Position(x, y) that was passed in the World class.
If you are drawing a Sprite or TextureRegion using your SpriteBatch the code should work fine. However, you pass your SpriteBatch 'batch' all the way down to WorldTile.render and never use it?! Instead you use myShape which I assume is a ShapeRenderer. You need to set the projection matrix for the ShapeRenderer as well otherwise it will draw 'upside-down'.
Try calling myShape.setProjectionMatrix(camera.combined); before you use your myShape.
Its probably best to declare and initialise myShape in your InGame class, usemyShape.setProjectionMatrix(camera.combined);, and then pass myShape down to tiles.render() as you did with your SpriteBatch.
Hope this helps.

Stage draws over everything

public void render(float delta) {
Gdx.gl.glClearColor(0, 0, 0.2f, 1);
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
stage.act(delta);
batch.setProjectionMatrix(camera.combined);
batch.begin();
if (lifeCount > 0) {
/*
When stage.draw is called here, it only displays the exit button.
The game still operates, but everything is invisible.
If I leave the game on, the game over screen is shown,
*/
stage.draw();
text.setColor(1.0f, 1.0f, 1.0f, 1.0f);
text.draw(batch, score + scoreCount, 25, 100);
text.draw(batch, lives + lifeCount, 25, 120);
text.draw(batch, speed + raindropSpeed, 25, 80);
batch.draw(bucketTexture, bucket.x, bucket.y);
for (Rectangle clearDrop : clearDrops) {
batch.draw(clearDropTexture, clearDrop.x, clearDrop.y);
}
for (Rectangle healthDrop : healthDrops) {
batch.draw(healthDropTexture, healthDrop.x, healthDrop.y);
/*
If I place stage.draw here, health drops are invisible.
This also happens if I place it in the raindrop for-loop and the
cleardrop for-loop
*/
}
for (Rectangle raindrop : raindrops) {
batch.draw(raindropTexture, raindrop.x, raindrop.y);
}
/*
If I place stage.draw here, the bucket, score, life, and speed
display correctly. The drops are still invisible.
*/
} else {
pause();
raindrops.clear();
game.setScreen(new GameOver(game));
}
batch.end();
What I have been trying to do is have an exit button in the top right corner of the GameScreen, although drawing the stage which the button resides in gives me difficulties (see comments in code).
Here is my code for the exit button and stage (resize()):
if (stage == null)
stage = new Stage(width, height, true);
stage.clear();
Gdx.input.setInputProcessor(stage);
TextButtonStyle styleQuit = new TextButtonStyle();
styleQuit.up = skin.getDrawable("buttonnormal");
styleQuit.down = skin.getDrawable("buttonpressed");
styleQuit.font = text;
quitButton = new TextButton(" ", styleQuit);
quitButton.setWidth(128);
quitButton.setHeight(128);
quitButton.setX(800 - 128);
quitButton.setY(480 - 100);
quitButton.addListener(new InputListener() {
public boolean touchDown(InputEvent event, float x, float y,
int pointer, int button) {
return true;
}
public void touchUp(InputEvent event, float x, float y,
int pointer, int button) {
Gdx.app.log(RainCatcher.LOG, "Quit Button Pressed");
game.setScreen(new MainMenu(game));
}
});
stage.addActor(quitButton);
And the rest (in show())
atlas = new TextureAtlas("gamebuttons.pack");
skin = new Skin();
skin.addRegions(atlas);
text = new BitmapFont();
Is there any special trick to allow a stage to be rendered alongside with the falling raindrops, bucket, and text? My friends and I have been stumped and couldn't find a solution anywhere.
Move stage.draw() after batch.end() or before batch.begin()
This is not the right approach you're taking in my opinion. If you're using a stage in libgdx, then you should benefit from other components of Scene2d. So, rather than drawing your raindrops and other game entities separately (and making your job complicated), you should make them actors and add them to stage wherever you need and then draw the stage in the render.
For example:
public class RaindDrop extends Actor {
TextureRegion region;
public RaindDrop () {
region = new TextureRegion(...);
}
public void draw (SpriteBatch batch, float parentAlpha) {
Color color = getColor();
batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
batch.draw(...);
}
}
So on for other entities. Initialise and add them to your stage.
Here's the official wiki to read more:
https://code.google.com/p/libgdx/wiki/scene2d

GLSurfaceView swaps 2D bitmaps being drawn

I have an application that receives information from a database, and is used to visualize 2D bitmaps onto a GLSurfaceView. The information received will determine the x-position of the bitmap, and which bitmap image to use (there are 4 different bitmaps in my res folder to choose from).
Below are the three classes that are being used. The Activity sets the Shapes objects that need to be drawn by passing an ArrayList to the GLLayer class. This ArrayList is passed to the instance of ShapeStorage class via another setList method. This class is responsible for drawing when they are received.
The problem that I'm having is the following. Suppose I receive one object (let's say that it's a square at it's located at x=1). Some time goes by, and I receive another shape (this time, it's a triangle, and it's located at x=-1). However, when this new shape appears on the screen, the old bitmap's appearance changes to a triangle, and the new one becomes a square. In other words, the objects themselves are at the correct position that they are supposed to be at, but the bitmap being associated with them has changed. Does anyone know what the possible cause of this can be? I'm still a newbie to OpenGL-ES, and while this code looks very convoluted, it just involves setting a bunch of various properties for the View. Please help me, StackOverflow! You're my only hope.
public class GLLayer extends GLSurfaceView implements Renderer {
int onDrawFrameCounter=1;
int[] cameraTexture;
byte[] glCameraFrame=new byte[256*256]; //size of a texture must be a power of 2
private Context context;
FloatBuffer cubeBuff;
FloatBuffer texBuff;
ShapeStorage shapes;
ArrayList<Shapes> shapereceptionbuffer;
public GLLayer(Context c) {
super(c);
this.context=c;
//Initiate our stars class with the number of stars
shapes = new ShapeStorage();
shapereceptionbuffer=new ArrayList<Shapes>();
this.setEGLConfigChooser(5, 6, 5, 8, 16, 0);
this.setRenderer(this); //set the following class as a GLSurfaceView renderer
this.getHolder().setFormat(PixelFormat.TRANSPARENT); //makes the GLSurfaceView translucent
}
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
try {
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST);
gl.glShadeModel(GL10.GL_SMOOTH); //Enable Smooth Shading
gl.glEnable(GL10.GL_TEXTURE_2D); //Enable Texture Mapping
gl.glEnable(GL10.GL_BLEND); //Enable blending
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); //Black Background
gl.glClearDepthf(1.0f); //Depth Buffer Setup
gl.glDisable(GL10.GL_DEPTH_TEST); //Disable depth test
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE); //Set The Blending Function For Translucency
shapes.setTextures(gl,context);
} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("Created",e.getMessage());
}
}//end of surfacecreated
public void setList(ArrayList<Shapes> receivedList){
synchronized(this.shapereceptionbuffer){
shapereceptionbuffer=receivedList;
}
}
public void onSurfaceChanged(GL10 gl, int width, int height) {
try {
if(height == 0) { //Prevent A Divide By Zero By
height = 1; //Making Height Equal One
}
gl.glViewport(0, 0, width, height);//specifies transformation from normalized device coordinates to window coordinates
float ratio = (float) width / height;
gl.glMatrixMode(GL11.GL_PROJECTION); //Select The Projection Matrix
gl.glLoadIdentity();//Reset The Projection Matrix
GLU.gluPerspective(gl, 45.0f, ratio, 0.1f, 100.0f);
gl.glMatrixMode(GL11.GL_MODELVIEW);//Select The Modelview Matrix
gl.glLoadIdentity();//Reset The Modelview Matrix
} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("Changed",e.getMessage());
}
//GLU.gluLookAt(gl, 0, 0, 4.2f, 0, 0, 0, 0, 1, 0);//eye-point location, center of the scene and an UP vector
}//end of surfacechanged
public void onDrawFrame(GL10 gl) {
try {
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); //Clear Screen And Depth Buffer
Log.d("Buffer Size", String.valueOf(shapereceptionbuffer.size()));
synchronized(this.shapereceptionbuffer){
shapes.setShapes(shapereceptionbuffer);
shapes.draw(gl, this.context);
}
} catch (Exception e) {
Log.d("Draw",e.getMessage());
}
}//end of ondrawframe
}
This class is responsible for drawing each of the shapes that are received from the external database.
/**
* This class contains, loads, initiates textures and draws our Shapes
*/
public class ShapeStorage {
private ArrayList<Shapes> shapestoragebuffer;
private Random rand = new Random(); // Initiate Random for random values of
// stars
/** Our texture pointer */
private int[] textures = new int[4];
/**
* Constructor for our holder
*/
public ShapeStorage() {
shapestoragebuffer = new ArrayList<Shapes>();
}
public void setShapes(ArrayList<Shapes> receivedlist) {
shapestoragebuffer = receivedList;
}
public void setupTextures(GL10 gl, Context context) {
// Get the texture from the Android resource directory
InputStream is = null;
gl.glGenTextures(4, textures, 0);
for (int i = 2; i < 6; i++) {
switch (i) {
case 2:
is = context.getResources().openRawResource(R.drawable.square);
break;
case 3:
is = context.getResources().openRawResource(R.drawable.circle);
break;
case 4:
is = context.getResources().openRawResource(R.drawable.hexagon);
break;
case 5:
is = context.getResources()
.openRawResource(R.drawable.triangle);
break;
}
Bitmap bitmap = null;
try {
// BitmapFactory is an Android graphics utility for images
bitmap = BitmapFactory.decodeStream(is);
} finally {
// Always clear and close
try {
is.close();
is = null;
} catch (IOException e) {
}
}
// Generate the texture pointer
// Create Linear Filtered Texture and bind it to texture
GLUtils.texImage2D(GL11.GL_TEXTURE_2D, 0, bitmap, 0);
gl.glBindTexture(GL11.GL_TEXTURE_2D, textures[i - 2]);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER,
GL11.GL_LINEAR);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER,
GL11.GL_LINEAR);
// Clean up
bitmap.recycle();
}
}
/**
* The drawing function.
*
* #param gl
* - The GL Context
* #param twinkle
* - Twinkle on or off
*/
public void draw(GL10 gl, Context context) {
// Bind the icon texture for all Shapes
for (int loop = 0; loop < shapestoragebuffer.size(); loop++) {
// Recover the current star into an object
Shapes shape = shapestoragebuffer.get(loop);
gl.glLoadIdentity(); // Reset The Current Modelview Matrix
// gl.glRotatef(180.0f, -1.0f, 0.0f, 0.0f);
float x = shape.get_Offset_from_center();
gl.glTranslatef(x, 0.0f, -40.0f);
// Draw
switch (victim.getType()) {
// green
case 2:
shape.draw(gl, textures[0]);
break;
// red
case 3:
shape.draw(gl, textures[1]);
break;
// yellow
case 4:
shape.draw(gl, textures[2]);
break;
case 5:
shape.draw(gl, textures[3]);
break;
}
}
}
}
Here is the class that defines each of the objects that are being drawn to the GLSurfaceView; each of the shapes that are being drawn.
public class Shapes {
private int _Offset_from_center;
private int type;
Context c;
/** The buffer holding the vertices */
private FloatBuffer vertexBuffer;
/** The buffer holding the texture coordinates */
private FloatBuffer textureBuffer;
/** The initial vertex definition */
private float vertices[] = {
-1.0f, -1.0f, 0.0f, //Bottom Left
1.0f, -1.0f, 0.0f, //Bottom Right
-1.0f, 1.0f, 0.0f, //Top Left
1.0f, 1.0f, 0.0f //Top Right
};
/** The initial texture coordinates (u, v) */
private float texture[] = {
0.0f, 0.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
};
public Shapes() {
//
ByteBuffer byteBuf = ByteBuffer.allocateDirect(vertices.length * 4);
byteBuf.order(ByteOrder.nativeOrder());
vertexBuffer = byteBuf.asFloatBuffer();
vertexBuffer.put(vertices);
vertexBuffer.position(0);
//
byteBuf = ByteBuffer.allocateDirect(texture.length * 4);
byteBuf.order(ByteOrder.nativeOrder());
textureBuffer = byteBuf.asFloatBuffer();
textureBuffer.put(texture);
textureBuffer.position(0);
}
public int get_Offset_from_center() {
return _Offset_from_center;
}
public void set_Offset_from_center(int _Offset_from_center) {
this._Offset_from_center = _Offset_from_center;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
/**
* The object own drawing function.
* Called from the renderer to redraw this instance
* with possible changes in values.
*
* #param gl - The GL Context
*/
public void draw(GL10 gl,int texture) {
gl.glBindTexture(GL11.GL_TEXTURE_2D, texture);
//Enable the vertex, texture and normal state
gl.glEnableClientState(GL11.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL11.GL_TEXTURE_COORD_ARRAY);
//Point to our buffers
gl.glVertexPointer(3, GL11.GL_FLOAT, 0, vertexBuffer);
gl.glTexCoordPointer(2, GL11.GL_FLOAT, 0, textureBuffer);
//Draw the vertices as triangle strip
gl.glDrawArrays(GL11.GL_TRIANGLE_STRIP, 0, vertices.length / 3);
//Disable the client state before leaving
gl.glDisableClientState(GL11.GL_VERTEX_ARRAY);
gl.glDisableClientState(GL11.GL_TEXTURE_COORD_ARRAY);
}
}
You're doing something very strange with the textures. Why do you upload the texture image data for every shape on every frame, and why do you do it after you render the shape?
Here's how the usual flow of texture use in OpenGL works:
At app initialization time:
Generate a texture ID using glGenTextures.
Use glBindTexture to make that ID the current texture.
Set texture parameters.
Upload image data with texImage2D or similar.
Then, every time you need to render stuff with the texture:
Bind the texture with glBindTexture with the same ID you used above.
Render things, which will use the texture.
What I would recommend here is this:
When you activity starts up (called indirectly from onCreate or maybe onResume depending on how Android OpenGL works):
Make textures a 5-element array and pass 5 to glGenTextures
Loop through, and for each of your five resources, bind one of the four above, and upload your image with texImage2D just like you have.
Then, when you actually need to draw a shape:
Pass in an int for the texture, not an int[]; choose the right one based on the shape you want.
Call glBindTexture in your draw function, first, with that value.
Do not make any calls to texImage2D in your rendering pass.
Call glDrawArrays to draw the shape you chose with glBindTexture.
Note also that all your shapes can share the same vertex and texture buffers, since their contents are the same; that's just an efficiency thing though.

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