gui.lwjgl.GUIRenderer.java Source code

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Here is the source code for gui.lwjgl.GUIRenderer.java

Source

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package gui.lwjgl;

import renderEngine.Renderer;
import gui.lib.GUIRenderable;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL13;
import org.lwjgl.opengl.GL20;
import org.lwjgl.opengl.GL30;
import org.lwjgl.util.vector.Matrix4f;
import org.lwjgl.util.vector.Vector2f;
import static toolbox.AttributeListPosition.TEXTURE_COORDS;
import static toolbox.AttributeListPosition.VERTEX_POSITIONS;
import toolbox.Maths;

/**
 * Renders GUI elements. IE elements that don't transform due to view matrix
 * and/or projection matrix.
 *
 * @author Blackened
 */
public class GUIRenderer extends GUIShader implements Renderer<GUIRenderable> {

    //<editor-fold defaultstate="collapsed" desc="Public Methods">
    @Override
    public void render(GUIRenderable element) {
        GL30.glBindVertexArray(element.getGUIElement().getVaoID());
        GL20.glEnableVertexAttribArray(VERTEX_POSITIONS);
        GL20.glEnableVertexAttribArray(TEXTURE_COORDS);

        Matrix4f transformationMatrix = Maths.createTransformationMatrix(
                new Vector2f(((2.0f * element.getGUIElement().getPosition().x) / Display.getWidth() - 1),
                        -1 * ((2.0f * element.getGUIElement().getPosition().y) / Display.getHeight()) + 1f),
                element.getGUIElement().getRotation(),
                element.getGUIElement().getWidth() / (float) (Display.getWidth() / 2),
                element.getGUIElement().getHeight() / (float) (Display.getHeight() / 2));

        this.loadUniformMatrix("transformationMatrix", transformationMatrix);

        GL13.glActiveTexture(GL13.GL_TEXTURE0);
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, element.getGUIElement().getTexture().getTextureID());
        GL11.glDrawArrays(GL11.GL_TRIANGLES, 0, 6);

        GL20.glDisableVertexAttribArray(VERTEX_POSITIONS);
        GL20.glDisableVertexAttribArray(TEXTURE_COORDS);
        GL30.glBindVertexArray(0);
    }
    //</editor-fold>

}