/*

ahbejarano

Transformation helper class.

*/

package geetransit.minecraft05.engine;

import org.joml.Matrix4f;

import org.joml.Vector3f;

import org.joml.Quaternionf;

public class Transformation {

private final Matrix4f projectionMatrix;

private final Matrix4f modelViewMatrix;

private final Matrix4f orthoProjectionMatrix;

private final Matrix4f orthoProjModelMatrix;

private final Matrix4f modelMatrix;

public Transformation() {

this.projectionMatrix = new Matrix4f();

this.modelViewMatrix = new Matrix4f();

this.orthoProjectionMatrix = new Matrix4f();

this.orthoProjModelMatrix = new Matrix4f();

this.modelMatrix = new Matrix4f();

}

public Matrix4f getProjectionMatrix(Window window, Camera camera) {

return this.projectionMatrix.setPerspective(

-camera.getFov(), (float) window.getWidth() / window.getHeight(),

camera.getNear(), camera.getFar()

);

}

public Matrix4f getModelMatrix(Item item) {

return this.modelMatrix.translationRotateScale(item.getPosition(), item.getRotation(), item.getScale());

}

public Matrix4f getModelViewMatrix(Item item, Matrix4f viewMatrix) {

return viewMatrix.mulAffine(this.getModelMatrix(item), this.modelViewMatrix);

}

public Matrix4f getOrthoProjectionMatrix(Window window) {

return this.orthoProjectionMatrix.setOrtho2D(0, window.getWidth(), window.getHeight(), 0);

}

// these 2 are different?

public Matrix4f newGetOrthoProjModelMatrix(Item item, Matrix4f orthoMatrix) {

return orthoMatrix.mulOrthoAffine(this.getModelMatrix(item), this.orthoProjModelMatrix);

}

public Matrix4f getOrthoProjModelMatrix(Item item, Matrix4f orthoMatrix) {

return this.orthoProjModelMatrix

.set(orthoMatrix)

.translate(item.getPosition())

.rotateX((float) Math.toRadians(-item.getRotation().x))

.rotateY((float) Math.toRadians(-item.getRotation().y))

.rotateZ((float) Math.toRadians(-item.getRotation().z))

.scale(item.getScale());

}

}