Virtual UI panels

cmake/Root.cmake

@@ -32,6 +32,7 @@ add_subdirectory(${SHARDS_DIR}/src/core src/core)
 add_subdirectory(${SHARDS_DIR}/src/mal src/mal)
 add_subdirectory(${SHARDS_DIR}/src/input src/input)
 add_subdirectory(${SHARDS_DIR}/src/gfx src/gfx)
+add_subdirectory(${SHARDS_DIR}/src/spatial src/spatial)
 
 if(SHARDS_WITH_EXTRA_SHARDS)
   if(SHARDS_WITH_RUST_SHARDS)

docs/details/shards/Spatial/Panel.md

@@ -0,0 +1,10 @@
+This shards defines a single world space UI panel. This shard needs to be placed within a [Spatial.UI](../UI)'s Contents block.
+
+This size of the panels defined using virtual UI points/units/pixels. How these virtual points map to world coordinates is controlled by the UI's Scale parameter. For example if the UI's scale is set to 200; 200 virtual points will be equal to 1 unit in world space.
+
+A panel's position and orientation in the world is controlled by the `Transform` parameter, which is a standard 4x4 transformation matrix.
+
+!!! danger
+    Applying scaling on this transform is not recommended and may result in undefined behavior.
+
+The Panels' contents should be placed in the `Contents` parameter, similar to the screen space [UI](../../General/UI)

docs/details/shards/Spatial/UI.md

@@ -0,0 +1,9 @@
+This shard defines the starting point for creating interactive world space UI elements.
+
+Every instance of [Spatial.Panel](../Panel) should be placed within this shards's Contents parameter.
+
+The draw commands for the UI elements are added to the Queue that is passed in. In contrast to the screen space [UI](../../General/UI) shard, they do not need to be rendered using a [GFX.UIPass](../../GFX/UIPass)
+
+!!! note
+    When rendering the draw commands, the sorting mode should be set to [SortMode.Queue](../../../enums/SortMode) so they are drawn in the correct order.
+    The [BuiltinFeatureId.Transform](../../GFX/BuiltinFeature/#transform) feature should be used

docs/samples/shards/Spatial/UI/1.edn

@@ -0,0 +1,55 @@
+(Setup
+ (GFX.DrawQueue) >= .queue
+
+  ; Create render steps
+ (GFX.BuiltinFeature :Id BuiltinFeatureId.Transform) >> .features
+ {:Features .features :Queue .queue :Sort SortMode.Queue} (GFX.DrawablePass) >> .render-steps
+
+  ; Panel transforms
+ 15.0 (Math.DegreesToRadians) (Math.AxisAngleY) (Math.Rotation) >= .tmp
+ (Float3 -1.0 0.0 0.0) (Math.Translation) (Math.MatMul .tmp) >= .panel-t-0
+ -15.0 (Math.DegreesToRadians) (Math.AxisAngleY) (Math.Rotation) >= .tmp
+ (Float3 1.0 0.0 0.0) (Math.Translation) (Math.MatMul .tmp) >= .panel-t-1
+ 5.0 (Math.DegreesToRadians) (Math.AxisAngleX) (Math.Rotation) >= .tmp
+ (Float3 0.0 1.2 0.0) (Math.Translation) (Math.MatMul .tmp) >= .panel-t-2
+
+  ; Camera
+ {:Position (Float3 1 2 8) :Target (Float3 0 0 0)} (Math.LookAt) >= .view-transform
+ (GFX.View :View .view-transform) >= .view)
+
+(GFX.MainWindow
+ :Title "World space UI" :Width 1280 :Height 720
+ :Contents
+ (->
+  .queue (GFX.ClearQueue)
+  (Spatial.UI
+   :Queue .queue :View .view :Scale 100.0 :Contents
+   (->
+    (Spatial.Panel
+     :Transform .panel-t-0 :Size (Float2 100 100) :Contents
+     (->
+      (UI.CentralPanel
+       (->
+        "Left panel" (UI.Label)
+        (UI.Button :Label "Button")))))
+    (Spatial.Panel
+     :Transform .panel-t-1 :Size (Float2 100 100) :Contents
+     (->
+      (UI.CentralPanel
+       (->
+        "Right panel" (UI.Label)
+        (UI.Button :Label "Button")))))
+    (Spatial.Panel
+     :Transform .panel-t-2 :Size (Float2 300 60) :Contents
+     (->
+      (UI.CentralPanel
+       (->
+        "Wide panel" (UI.Label)
+        (Setup
+         (LoadImage "../../assets/ShardsLogo.png") (GFX.Texture) >= .button-texture)
+        (UI.Horizontal (->
+                        .button-texture (UI.ImageButton :Scale (Float2 0.01))
+                        .button-texture (UI.ImageButton :Scale (Float2 0.01))
+                        .button-texture (UI.ImageButton :Scale (Float2 0.01))))))))))
+
+  (GFX.Render :Steps .render-steps :View .view)))

docs/samples/shards/Spatial/UI/1.out.md

@@ -0,0 +1 @@
+![Image](../assets/render_output.png)

include/linalg_shim.hpp

@@ -6,6 +6,8 @@
 
 #include <linalg.h>
 #include <vector>
+#include <shards.h>
+
 namespace shards {
 struct alignas(16) Mat4 : public linalg::aliases::float4x4 {
   using linalg::aliases::float4x4::mat;

rust/src/shards/gui/context.rs

@@ -1,15 +1,18 @@
 /* SPDX-License-Identifier: BSD-3-Clause */
 /* Copyright © 2022 Fragcolor Pte. Ltd. */
 
+use egui_gfx::gfx_EguiRenderer_renderNoTransform;
+
+use super::egui_host::EguiHost;
 use super::util;
 use super::EguiContext;
 use super::CONTEXTS_NAME;
 use super::EGUI_CTX_TYPE;
 use super::EGUI_UI_SEQ_TYPE;
 use super::GFX_CONTEXT_TYPE;
-use super::INPUT_CONTEXT_TYPE;
 use super::GFX_QUEUE_VAR_TYPES;
 use super::HELP_OUTPUT_EQUAL_INPUT;
+use super::INPUT_CONTEXT_TYPE;
 use super::PARENTS_UI_NAME;
 use crate::shard::Shard;
 use crate::shardsc;
@@ -56,8 +59,7 @@ impl Default for EguiContext {
     parents.set_name(PARENTS_UI_NAME);
 
     Self {
-      context: None,
-      instance: ctx,
+      host: EguiHost::default(),
       requiring: Vec::new(),
       queue: ParamVar::default(),
       contents: ShardsVar::default(),
@@ -73,7 +75,6 @@ impl Default for EguiContext {
         var.set_name(CStr::from_ptr(name).to_str().unwrap());
         var
       },
-      parents,
       renderer: egui_gfx::Renderer::new(),
       input_translator: egui_gfx::InputTranslator::new(),
     }
@@ -168,30 +169,12 @@ impl Shard for EguiContext {
     let mut data = *data;
     // clone shared into a new vector we can append things to
     let mut shared: ExposedTypes = data.shared.into();
+
     // expose UI context
-    let ctx_info = ExposedInfo {
-      exposedType: EGUI_CTX_TYPE,
-      name: self.instance.get_name(),
-      help: cstr!("The UI context.").into(),
-      isMutable: false,
-      isProtected: true, // don't allow to be used in code/wires
-      isTableEntry: false,
-      global: false,
-      isPushTable: false,
-    };
-    shared.push(ctx_info);
-    // expose UI parents seq
-    let ui_info = ExposedInfo {
-      exposedType: EGUI_UI_SEQ_TYPE,
-      name: self.parents.get_name(),
-      help: cstr!("The parent UI objects.").into(),
-      isMutable: false,
-      isProtected: true, // don't allow to be used in code/wires
-      isTableEntry: false,
-      global: false,
-      isPushTable: false,
-    };
-    shared.push(ui_info);
+    for exposed in self.host.get_exposed_info() {
+      shared.push(*exposed);
+    }
+
     // update shared
     data.shared = (&shared).into();
 
@@ -205,120 +188,51 @@ impl Shard for EguiContext {
   }
 
   fn warmup(&mut self, ctx: &Context) -> Result<(), &str> {
-    self.context = Some(egui::Context::default());
-    self.instance.warmup(ctx);
+    self.host.warmup(ctx)?;
     self.queue.warmup(ctx);
     self.contents.warmup(ctx)?;
     self.graphics_context.warmup(ctx);
     self.input_context.warmup(ctx);
-    self.parents.warmup(ctx);
-
-    // Initialize the parents stack in the root UI.
-    // Every other UI elements will reference it and push or pop UIs to it.
-    if !self.parents.get().is_seq() {
-      self.parents.set(Seq::new().as_ref().into());
-    }
-
-    // Context works the same
-    if !self.instance.get().is_seq() {
-      self.instance.set(Seq::new().as_ref().into());
-    }
 
     Ok(())
   }
 
   fn cleanup(&mut self) -> Result<(), &str> {
-    self.parents.cleanup();
     self.graphics_context.cleanup();
     self.input_context.cleanup();
     self.contents.cleanup();
     self.queue.cleanup();
-    self.instance.cleanup();
+    self.host.cleanup()?;
     Ok(())
   }
 
   fn activate(&mut self, context: &Context, input: &Var) -> Result<Var, &str> {
-    let gui_ctx = if let Some(gui_ctx) = &self.context {
-      gui_ctx
-    } else {
-      return Err("No UI context");
-    };
-
     if self.contents.is_empty() {
       return Ok(*input);
     }
 
-    let raw_input = unsafe {
-      let inputs = shardsc::gfx_getEguiWindowInputs(
+    let egui_input = unsafe {
+      &*(shardsc::gfx_getEguiWindowInputs(
         self.input_translator.as_mut_ptr() as *mut shardsc::gfx_EguiInputTranslator,
         self.graphics_context.get(),
         self.input_context.get(),
         1.0,
-      ) as *const egui_gfx::egui_Input;
-      egui_gfx::translate_raw_input(&*inputs)
+      ) as *const egui_gfx::egui_Input)
     };
 
-    match raw_input {
-      Err(_error) => {
-        shlog_debug!("Input translation error: {:?}", _error);
-        Err("Input translation error")
-      }
-      Ok(raw_input) => {
-        let draw_scale = raw_input.pixels_per_point.unwrap_or(1.0);
-
-        let mut error: Option<&str> = None;
-        let egui_output = gui_ctx.run(raw_input, |ctx| {
-          error = (|| -> Result<(), &str> {
-            // Push empty parent UI in case this context is nested inside another UI
-            util::update_seq(&mut self.parents, |seq| {
-              seq.push(Var::default());
-            })?;
-
-            let mut _output = Var::default();
-            let wire_state =
-              util::with_object_stack_var(&mut self.instance, ctx, &EGUI_CTX_TYPE, || {
-                Ok(self.contents.activate(context, input, &mut _output))
-              })?;
-
-            if wire_state == WireState::Error {
-              return Err("Failed to activate UI contents");
-            }
-
-            // Pop empty parent UI
-            util::update_seq(&mut self.parents, |seq| {
-              seq.pop();
-            })?;
-
-            Ok(())
-          })()
-          .err();
-        });
-
-        if let Some(e) = error {
-          return Err(e);
-        }
-
-        #[cfg(not(any(target_arch = "wasm32", target_os = "ios")))]
-        if let Some(url) = &egui_output.platform_output.open_url {
-          webbrowser::open(&url.url).map_err(|e| {
-            shlog_error!("{}", e);
-            "Failed to open URL."
-          })?;
-        }
-
-        let queue_var = self.queue.get();
-        unsafe {
-          let queue = shardsc::gfx_getDrawQueueFromVar(queue_var);
-          self.renderer.render(
-            gui_ctx,
-            egui_output,
-            queue as *const egui_gfx::gfx_DrawQueuePtr,
-            draw_scale,
-          )?;
-        }
-
-        Ok(*input)
-      }
+    self
+      .host
+      .activate(&egui_input, &(&self.contents).into(), context, input)?;
+    let egui_output = self.host.get_egui_output();
+
+    let queue_var = self.queue.get();
+    unsafe {
+      let queue = shardsc::gfx_getDrawQueueFromVar(queue_var);
+      self
+        .renderer
+        .render_with_native_output(egui_output, queue as *const egui_gfx::gfx_DrawQueuePtr);
     }
+
+    Ok(*input)
   }
 }