@Override
public void display(GLAutoDrawable glad) {
GL3 gl3 = glad.getGL().getGL3();
gl3.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
gl3.glClear(GL3.GL_COLOR_BUFFER_BIT);
gl3.glUseProgram(program);
gl3.glBindVertexArray(VAO[0]);
gl3.glDrawArrays(GL3.GL_TRIANGLES, 0, 3);
gl3.glBindVertexArray(0);
gl3.glUseProgram(0);
}
@Override
public void display(GLAutoDrawable drawable) {
// System.out.println("display");
GL3 gl3 = drawable.getGL().getGL3();
/**
* We set the clear color and depth (although depth is not necessary since it is 1 by default).
*/
gl3.glClearColor(0f, .33f, 0.66f, 1f);
gl3.glClearDepthf(1f);
gl3.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
{
// update matrix based on time
now = System.currentTimeMillis();
float diff = (float) (now - start) / 1000;
/**
* Here we build the matrix that will multiply our original vertex positions. We scale,
* halving it, and rotate it.
*/
scale = FloatUtil.makeScale(scale, true, 0.5f, 0.5f, 0.5f);
zRotazion = FloatUtil.makeRotationEuler(zRotazion, 0, 0, 0, diff);
modelToClip = FloatUtil.multMatrix(scale, zRotazion);
}
gl3.glUseProgram(programName);
gl3.glBindVertexArray(vertexArrayName.get(0));
gl3.glUniformMatrix4fv(modelToClipMatrixUL, 1, false, modelToClip, 0);
gl3.glDrawElements(GL_TRIANGLES, elementSize, GL_UNSIGNED_SHORT, 0);
/**
* The following line binds VAO and program to the default values, this is not a cheaper
* binding, it costs always as a binding. Every binding means additional validation and
* overhead, this may affect your performances. So you should avoid these calls, but remember
* that OpenGL is a state machine, so what you left bound remains bound!
*/
// gl3.glBindVertexArray(0);
// gl3.glUseProgram(0);
/**
* Check always any GL error, but keep in mind this is an implicit synchronization between CPU
* and GPU, so you should use it only for debug purposes.
*/
checkError(gl3, "display");
}