oh my god it compiles. A month of brainstorming comes out to a single enum

src/main.rs

@@ -25,7 +25,7 @@ use crate::util::load_raw;
 use crate::sprite::{Poly, Text, TextHandle, TextVertex, TextInstance};
 use vulkano::instance::debug::DebugCallback;
 use crate::compute::compu_frame::CompuFrame;
-use crate::canvas::canvas_frame::{CanvasFrame, DrawableTestee, CanvasFrameTest, ImplVertexData};
+use crate::canvas::canvas_frame::{CanvasFrame, CanvasFrameTest};
 use crate::compute::managed::compu_sprite::CompuSprite;
 use std::sync::Arc;
 use crate::canvas::managed::handles::CanvasTextureHandle;
@@ -55,6 +55,23 @@ pub mod compute;
 
 
 */
+pub struct ImplVertexData1 {
+    pub x: i32,
+    pub y: i32,
+}
+
+pub struct ImplVertexData2 {
+    pub x: i32,
+    pub y: i32,
+}
+
+impl ImplVertexData1 {}
+impl ImplVertexData2 {}
+
+enum VertexTypes {
+    VType1(ImplVertexData1),
+    VType2(ImplVertexData2),
+}
 
 pub fn main() {
     hprof::start_frame();
@@ -182,12 +199,14 @@ pub fn main() {
             break;
         }
 
-        let dt = DrawableTestee{
-            vertices: vec![ImplVertexData{ x: 0, y: 0 }],
-            handle: Arc::new(Default::default())
-        };
-        let mut cft :CanvasFrameTest<ImplVertexData, CanvasTextureHandle>= CanvasFrameTest{ map: Default::default() };
-        cft.draw(&dt);
+//        let dt = DrawableTestee{
+//            vertices: vec![ImplVertexData{ x: 0, y: 0 }],
+//            handle: Arc::new(CanvasTextureHandle{ handle: 0 })
+//        };
+        let mut cft : CanvasFrameTest<VertexTypes> =
+            CanvasFrameTest{ map: Default::default() };
+
+     //   cft.draw(&dt);
 
         let mut compu_frame = CompuFrame::new();
 //        compu_frame.add(compute_buffer.clone(), compute_kernel.clone());