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Use radial distance for making LOD decisions.

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Previously, only forward basis distance from the camera was used.
This means that unnecessarily high LOD levels were used for objects located to the side of the camera.
The distance from the camera origin is now used, independently of direction.
This commit is contained in:
TechnoPorg
2022-10-11 19:34:23 -06:00
parent 5aadc618b6
commit b04350828e
8 changed files with 28 additions and 35 deletions
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12
drivers/gles3/rasterizer_scene_gles3.cpp
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@@ -1166,12 +1166,13 @@ void RasterizerSceneGLES3::_fill_render_list(RenderListType p_render_list, const
// LOD
if (p_render_data->screen_mesh_lod_threshold > 0.0 && mesh_storage->mesh_surface_has_lod(surf->surface)) {
//lod
Vector3 lod_support_min = inst->transformed_aabb.get_support(-p_render_data->lod_camera_plane.normal);
Vector3 lod_support_max = inst->transformed_aabb.get_support(p_render_data->lod_camera_plane.normal);
// Get the LOD support points on the mesh AABB.
Vector3 lod_support_min = inst->transformed_aabb.get_support(p_render_data->cam_transform.basis.get_column(Vector3::AXIS_Z));
Vector3 lod_support_max = inst->transformed_aabb.get_support(-p_render_data->cam_transform.basis.get_column(Vector3::AXIS_Z));
float distance_min = p_render_data->lod_camera_plane.distance_to(lod_support_min);
float distance_max = p_render_data->lod_camera_plane.distance_to(lod_support_max);
// Get the distances to those points on the AABB from the camera origin.
float distance_min = (float)p_render_data->cam_transform.origin.distance_to(lod_support_min);
float distance_max = (float)p_render_data->cam_transform.origin.distance_to(lod_support_max);
float distance = 0.0;
@@ -1650,7 +1651,6 @@ void RasterizerSceneGLES3::render_scene(const Ref<RenderSceneBuffers> &p_render_
// this should be the same for all cameras..
render_data.lod_distance_multiplier = p_camera_data->main_projection.get_lod_multiplier();
render_data.lod_camera_plane = Plane(-p_camera_data->main_transform.basis.get_column(Vector3::AXIS_Z), p_camera_data->main_transform.get_origin());
if (get_debug_draw_mode() == RS::VIEWPORT_DEBUG_DRAW_DISABLE_LOD) {
render_data.screen_mesh_lod_threshold = 0.0;