more intense position-relative rendering to fix some precision problems

1 files changed, 4 insertions, 6 deletions

diff --git a/assets/shaders/tacmap/orbit.wgsl b/assets/shaders/tacmap/orbit.wgsl
index 901200f..a890fd8 100644
--- a/assets/shaders/tacmap/orbit.wgsl
+++ b/assets/shaders/tacmap/orbit.wgsl
@@ -11,7 +11,8 @@ struct VertexOutput {
 struct CameraUniform {
     view: mat4x4<f32>,
     proj: mat4x4<f32>,
-    pos: vec3<f32>,
+    abs_pos: vec3<f32>,
+    rel_pos: vec3<f32>,
     scale: f32
 };
 
@@ -37,13 +38,10 @@ fn vs_main(
         origins[model.origin][1],
         origins[model.origin][2]);
 
-    let model_pos = ((origin - camera.pos) + model.position) * camera.scale;
-    let origin_pos = (origin - camera.pos) * camera.scale;
+    let model_pos = ((origin - camera.abs_pos - camera.rel_pos) + model.position) * camera.scale;
+    let origin_pos = (origin - camera.abs_pos - camera.rel_pos) * camera.scale;
 
     let view = camera.view;
-    let camera_right = vec3<f32>(view[0][0], view[1][0], view[2][0]);
-    let camera_up = vec3<f32>(view[0][1], view[1][1], view[2][1]);
-    let camera_forward = vec3<f32>(view[0][2], view[1][2], view[2][2]);
 
     let orbit_normal = normalize(model.position);
     var normal = orbit_normal;