// Copyright (c) 2021 Dominic Msters
// 
// This software is released under the MIT License.
// https://opensource.org/licenses/MIT

#pragma once
#include <dawn/dawn.h>
#include "matrix.h"

/**
 * Make a camera look at a position in world space while itself being positioned
 * within world space.
 * 
 * @param camera The camera to position.
 * @param x The X position in world space of the camera.
 * @param y The Y position in world space of the camera.
 * @param z The Z position in world space of the camera.
 * @param targetX The Target X position in world space of the camera.
 * @param targetY The Target Y position in world space of the camera.
 * @param targetZ The Target Z position in world space of the camera.
 */
void cameraLookAt(camera_t *camera,
  float x, float y, float z,
  float targetX, float targetY, float targetZ
);

/**
 * Make a camera look in a direction based on a rotation direction.
 * 
 * @param camera The camera to position.
 * @param x The X position in world space of the camera.
 * @param y The Y position in world space of the camera.
 * @param z The Z position in world space of the camera.
 * @param pitch The pitch of the camera.
 * @param yaw The yaw of the camera.
 * @param roll The roll of the camera.
 */
void cameraLook(camera_t *camera,
  float x, float y, float z,
  float pitch, float yaw, float roll
);

/**
 * Make a camera's projection be a 3D Perspective view.
 * 
 * @param camera The camera to project.
 * @param fov The field of view of the camera (in degrees).
 * @param aspect The aspect ratio of the camera (w / h)
 * @param near The near plane clip.
 * @param far the far plane clip.
 */
void cameraPerspective(camera_t *camera,
  float fov, float aspect, float near, float far
);

/**
 * Defines an orthorgonal camera matrix.
 * 
 * @param camera Camera to position.
 * @param left The left side of the viewport.
 * @param right The right side of the viewport.
 * @param bottom The bottom side of the viewport.
 * @param near The near plane clip.
 * @param far the far plane clip.
 */
void cameraOrtho(camera_t *camera,
  float left, float right, float bottom, float top, float near, float far
);