@Override
public void render() {
GL11 gl = Gdx.gl11;
gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
gl.glEnable(GL10.GL_TEXTURE_2D);
texture.bind();
vbo.bind();
ibo.bind();
gl.glDrawElements(GL11.GL_TRIANGLES, 3, GL11.GL_UNSIGNED_SHORT, 0);
ibo.unbind();
vbo.unbind();
}
@Override
public void create() {
vbo =
new VertexBufferObject(
true,
3,
new VertexAttribute(VertexAttributes.Usage.Position, 2, "a_Position"),
new VertexAttribute(VertexAttributes.Usage.TextureCoordinates, 2, "a_TexCoords"),
new VertexAttribute(VertexAttributes.Usage.ColorPacked, 4, "a_Color"));
float[] vertices =
new float[] {
-1,
-1,
0,
0,
Color.toFloatBits(1f, 0f, 0f, 1f),
0,
1,
0.5f,
1.0f,
Color.toFloatBits(0f, 1f, 0f, 1f),
1,
-1,
1,
0,
Color.toFloatBits(0f, 0f, 1f, 1f)
};
vbo.setVertices(vertices, 0, vertices.length);
ibo = new IndexBufferObject(true, 3);
ibo.setIndices(new short[] {0, 1, 2}, 0, 3);
texture = new Texture(Gdx.files.internal("data/badlogic.jpg"));
}
@Override
public void dispose() {
texture.dispose();
vbo.dispose();
indices.dispose();
shader.dispose();
}
@Override
public void create() {
String vertexShader =
"attribute vec4 a_position; \n"
+ "attribute vec4 a_color;\n"
+ "attribute vec2 a_texCoords;\n"
+ "varying vec4 v_color;"
+ "varying vec2 v_texCoords;"
+ "void main() \n"
+ "{ \n"
+ " v_color = vec4(a_color.x, a_color.y, a_color.z, 1); \n"
+ " v_texCoords = a_texCoords; \n"
+ " gl_Position = a_position; \n"
+ "} \n";
String fragmentShader =
"#ifdef GL_ES\n"
+ "precision mediump float;\n"
+ "#endif\n"
+ "varying vec4 v_color;\n"
+ "varying vec2 v_texCoords;\n"
+ "uniform sampler2D u_texture;\n"
+ "void main() \n"
+ "{ \n"
+ " gl_FragColor = v_color * texture2D(u_texture, v_texCoords);\n"
+ "}";
shader = new ShaderProgram(vertexShader, fragmentShader);
vbo =
new VertexBufferObject(
true,
3,
new VertexAttribute(VertexAttributes.Usage.Position, 2, "a_position"),
new VertexAttribute(VertexAttributes.Usage.TextureCoordinates, 2, "a_texCoords"),
new VertexAttribute(VertexAttributes.Usage.ColorPacked, 4, "a_color"));
float[] vertices =
new float[] {
-1,
-1,
0,
0,
Color.toFloatBits(1f, 0f, 0f, 1f),
0,
1,
0.5f,
1.0f,
Color.toFloatBits(0f, 1f, 0f, 1f),
1,
-1,
1,
0,
Color.toFloatBits(0f, 0f, 1f, 1f)
};
vbo.setVertices(vertices, 0, vertices.length);
indices = new IndexBufferObject(3);
indices.setIndices(new short[] {0, 1, 2}, 0, 3);
texture = new Texture(Gdx.files.internal("data/badlogic.jpg"));
}
@Override
public void render() {
GL20 gl = Gdx.gl20;
gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
Gdx.gl.glClearColor(0.7f, 0, 0, 1);
gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
gl.glEnable(GL20.GL_TEXTURE_2D);
shader.begin();
shader.setUniformi("u_texture", 0);
texture.bind();
vbo.bind(shader);
indices.bind();
gl.glDrawElements(GL20.GL_TRIANGLES, 3, GL20.GL_UNSIGNED_SHORT, indices.getBuffer().position());
indices.unbind();
vbo.unbind(shader);
shader.end();
}
@Override
public void resume() {
vbo.invalidate();
ibo.invalidate();
}
@Override
public void dispose() {
texture.dispose();
vbo.dispose();
ibo.dispose();
}
