void rasterized_color_triangle_app::update_shader_mvp()
{
matrix4x4 const local_to_world_transform{
matrix4x4::rotation_around_x_axis(m_triangle_rotation.x) *
matrix4x4::rotation_around_y_axis(m_triangle_rotation.y) *
matrix4x4::rotation_around_z_axis(m_triangle_rotation.z) *
matrix4x4::translation(m_triangle_position.x, m_triangle_position.y, m_triangle_position.z)};
matrix4x4 const camera_rotation{
m_camera.get_right().x, m_camera.get_up().x, m_camera.get_forward().x, 0.0f,
m_camera.get_right().y, m_camera.get_up().y, m_camera.get_forward().y, 0.0f,
m_camera.get_right().z, m_camera.get_up().z, m_camera.get_forward().z, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f};
matrix4x4 const camera_translation{
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
-m_camera.get_position().x, -m_camera.get_position().y, -m_camera.get_position().z, 1.0f};
matrix4x4 const world_to_camera_transform{camera_translation * camera_rotation};
matrix4x4 const camera_to_clip_transform{
matrix4x4::clip_space(
m_camera.get_horizontal_fov(),
m_camera.get_vertical_fov(),
m_camera.get_near_plane_z(),
m_camera.get_far_plane_z())};
matrix4x4 const local_to_clip_transform{
local_to_world_transform * world_to_camera_transform * camera_to_clip_transform};
if (m_shader_option == shader_option::color)
{
m_color_shader.set_mvp_matrix(local_to_clip_transform);
}
else
{
m_texture_shader.set_mvp_matrix(local_to_clip_transform);
}
}
camera_controller::camera_controller(camera &target) : target(target), radius(0)
{
auto camera_vector = target.get_look_at() - target.get_position();
radius = math::length(camera_vector);
orientation = math::spherical_angles(camera_vector);
}