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

#include "camera.h"

void cameraLookAt(camera_t *camera,
  float x, float y, float z,
  float targetX, float targetY, float targetZ
) {
  ASSERT_NOT_NULL(camera);
  matrixIdentity(&camera->view);
  matrixLookAt(&camera->view, x, y, z, targetX, targetY, targetZ, 0, 1, 0);
}

void cameraLookAtStruct(camera_t *camera, cameralookat_t look) {
  ASSERT_NOT_NULL(camera);
  cameraLookAt(camera,
    look.x, look.y, look.z, look.lookX, look.lookY, look.lookZ
  );
}

void cameraLook(camera_t *camera,
  float x, float y, float z,
  float pitch, float yaw, float roll
) {
  ASSERT_NOT_NULL(camera);

  matrixIdentity(&camera->view);
  matrixLook(&camera->view, x, y, z, pitch, yaw, roll, 0, 1, 0);
}

void cameraPerspective(camera_t *camera,
  float fov, float aspect, float camNear, float camFar
) {
  ASSERT_NOT_NULL(camera);

  matrixIdentity(&camera->projection);
  matrixPerspective(&camera->projection,mathDeg2Rad(fov),aspect,camNear,camFar);
}

void cameraOrtho(camera_t *camera,
  float left, float right, float bottom, float top, float camNear, float camFar
) {
  ASSERT_NOT_NULL(camera);

  matrixIdentity(&camera->projection);
  matrixOrtho(&camera->projection, left, right, bottom, top, camNear, camFar);
}

void cameraOrbit(camera_t *camera,
  float distance, float yaw, float pitch,
  float targetX, float targetY, float targetZ
) {

  float cy = cosf(pitch);
  float x = distance * sinf(yaw) * cy;
  float y = distance * sinf(pitch);
  float z = distance * cosf(yaw) * cy;

  ASSERT_NOT_NULL(camera);
  
  cameraLookAt(camera, x, y, z, targetX, targetY, targetZ);
}