From b14dd1c1f3e198137fa8b9e0c4f5e56949b11cd0 Mon Sep 17 00:00:00 2001
From: Jon Santmyer <jon@jonsantmyer.com>
Date: Fri, 1 May 2026 16:02:59 -0400
Subject: i don't know how to get the line segments to render right

---
 assets/shaders/tacmap/body.wgsl  | 15 +++++++++++++--
 assets/shaders/tacmap/orbit.wgsl | 34 +++++++++++++++++++++-------------
 2 files changed, 34 insertions(+), 15 deletions(-)

(limited to 'assets/shaders/tacmap')

diff --git a/assets/shaders/tacmap/body.wgsl b/assets/shaders/tacmap/body.wgsl
index 7156150..217a0b2 100644
--- a/assets/shaders/tacmap/body.wgsl
+++ b/assets/shaders/tacmap/body.wgsl
@@ -1,6 +1,7 @@
 struct InstanceInput {
     @location(0) position: vec3<f32>,
-    @location(1) radius: f32
+    @location(1) origin: vec3<f32>,
+    @location(2) radius: f32
 };
 
 struct VertexOutput {
@@ -47,7 +48,17 @@ fn vs_main(
 
     //Scale the world around the camera scale and translate about the camera's
     //absolute (/target) position
-    let instance_pos = (instance.position - camera.pos) * camera.scale;
+    let relative_pos = instance.position * camera.scale;
+    let origin_pos = (instance.origin - camera.pos) * camera.scale;
+
+    if all(relative_pos != origin_pos) {
+        if length(relative_pos) < 0.01 {
+            out.clip_position = vec4<f32>(0.0, 0.0, 0.0, 1.0);
+            return out;
+        }
+    }
+
+    let instance_pos = relative_pos + origin_pos;
 
     let view_proj = camera.proj * view;
 
diff --git a/assets/shaders/tacmap/orbit.wgsl b/assets/shaders/tacmap/orbit.wgsl
index d054a05..901200f 100644
--- a/assets/shaders/tacmap/orbit.wgsl
+++ b/assets/shaders/tacmap/orbit.wgsl
@@ -1,7 +1,7 @@
 struct VertexInput {
     @builtin(vertex_index) index: u32,
     @location(0) origin: u32,
-    @location(1) position: vec3<f32>,
+    @location(1) position: vec3<f32>
 };
 
 struct VertexOutput {
@@ -21,11 +21,8 @@ var<uniform> camera: CameraUniform;
 @group(1) @binding(0)
 var<storage> origins: array<array<f32,3>>;
 
-const POINT_NORMALS = array<vec2<f32>,4>(
-    vec2<f32>(0.0, -0.5),
-    vec2<f32>(0.0,  0.5),
-    vec2<f32>(0.5, -0.5),
-    vec2<f32>(0.5,  0.5)
+const POINT_NORMALS = array<f32,2>(
+    -0.5, 0.5
 );
 
 @vertex
@@ -34,22 +31,33 @@ fn vs_main(
 ) -> VertexOutput {
     var out: VertexOutput;
 
-    let index = model.index % 4u;
-    let normal = POINT_NORMALS[index];
+    let index = model.index % 2u;
     let origin = vec3<f32>(
         origins[model.origin][0],
         origins[model.origin][1],
         origins[model.origin][2]);
 
-    let model_pos = (origin + model.position - camera.pos) * camera.scale;
+    let model_pos = ((origin - camera.pos) + model.position) * camera.scale;
+    let origin_pos = (origin - camera.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;
+
+    if length(model_pos - origin_pos) > 0.01 {
+        normal *= POINT_NORMALS[index];
+    }
+
     let view_proj = camera.proj * camera.view;
 
     //Scale the world around the camera scale and translate about the camera's
     //absolute (/target) position
-
-    let point_view_pos = view_proj * vec4<f32>(model_pos, 1.0);
+    let point_view_pos = view_proj * vec4<f32>(model_pos + normal * 0.005, 1.0);
     out.clip_position = point_view_pos;
-    out.clip_position += vec4<f32>(normal * 0.01, 0.0, 0.0) * point_view_pos.w;
 
     return out;
 }
@@ -57,5 +65,5 @@ fn vs_main(
 @fragment
 fn fs_main(in: VertexOutput
 ) -> @location(0) vec4<f32> {
-    return vec4<f32>(0.25, 1.0, 0.25, 1.0);
+    return vec4<f32>(0.0, 0.5, 0.0, 1.0);
 }
-- 
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