text: /**
   * Copyright (c) 2018 Razeware LLC
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * Notwithstanding the foregoing, you may not use, copy, modify, merge, publish,
   * distribute, sublicense, create a derivative work, and/or sell copies of the
   * Software in any work that is designed, intended, or marketed for pedagogical or
   * instructional purposes related to programming, coding, application development,
   * or information technology.  Permission for such use, copying, modification,
   * merger, publication, distribution, sublicensing, creation of derivative works,
   * or sale is expressly withheld.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  #ifndef Common_h
  #define Common_h
  
  #import <simd/simd.h>
  
  typedef matrix_float4x4 float4x4;
  typedef matrix_float3x3 float3x3;
  typedef vector_float2 float2;
  typedef vector_float3 float3;
  typedef vector_float4 float4;
  
  typedef struct {
      float4x4 modelMatrix;
      float4x4 viewMatrix;
      float4x4 projectionMatrix;
      float3x3 normalMatrix;
  } Uniforms;
  
  typedef enum {
      Unused = 0,
      SunLight = 1,
      SpotLight = 2,
      PointLight = 3,
      AmbientLight = 4,
  } LightType;
  
  typedef struct {
      float3 position;
      float3 color;
      float3 specularColor;
      float intensity;
      float3 attenuation;
      LightType lightType;
      float coneAngle;
      float3 coneDirection;
      float coneAttenuation;
  } Light;
  
  typedef struct {
      uint lightCount;
      float3 cameraPosition;
      uint tiling;
  } FragmentUniforms;
  
  typedef enum {
      BufferIndexVertex = 0,
      BufferIndexUniforms = 1,
      BufferIndexLights = 2,
      BufferIndexFragmentUniforms = 3
  } BufferIndices;
  
  typedef enum {
      Position = 0,
      Normal = 1,
      UV = 2
  } Attributes;
  
  typedef enum {
      BaseColorTexture = 0,
  } Textures;
  
  #endif /* Common_h */
  