💿🐜 Antkeeper source code https://antkeeper.com
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  1. /*
  2. * Copyright (C) 2021 Christopher J. Howard
  3. *
  4. * This file is part of Antkeeper source code.
  5. *
  6. * Antkeeper source code is free software: you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License as published by
  8. * the Free Software Foundation, either version 3 of the License, or
  9. * (at your option) any later version.
  10. *
  11. * Antkeeper source code is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
  18. */
  19. #include "directional-light.hpp"
  20. #include "configuration.hpp"
  21. #include "math/math.hpp"
  22. namespace scene {
  23. static float3 interpolate_direction(const float3& x, const float3& y, float a)
  24. {
  25. math::quaternion<float> q0 = math::rotation(global_forward, x);
  26. math::quaternion<float> q1 = math::rotation(global_forward, y);
  27. return math::normalize(math::slerp(q0, q1, a) * global_forward);
  28. }
  29. directional_light::directional_light():
  30. direction(global_forward, interpolate_direction),
  31. light_texture(nullptr),
  32. light_texture_opacity(1.0f, math::lerp<float, float>),
  33. light_texture_scale({1.0f, 1.0f}, math::lerp<float2, float>)
  34. {}
  35. void directional_light::set_light_texture(const gl::texture_2d* texture)
  36. {
  37. light_texture = texture;
  38. }
  39. void directional_light::set_light_texture_opacity(float opacity)
  40. {
  41. light_texture_opacity[1] = opacity;
  42. }
  43. void directional_light::set_light_texture_scale(const float2& scale)
  44. {
  45. light_texture_scale[1] = scale;
  46. }
  47. void directional_light::update_tweens()
  48. {
  49. light::update_tweens();
  50. direction.update();
  51. if (light_texture)
  52. {
  53. light_texture_opacity.update();
  54. light_texture_scale.update();
  55. }
  56. }
  57. void directional_light::transformed()
  58. {
  59. direction[1] = math::normalize(get_transform().rotation * global_forward);
  60. }
  61. } // namespace scene