From f389609bd9d3546d3a20dd54b5b35fbe5cdb6cc7 Mon Sep 17 00:00:00 2001
From: John Alanbrook <john@pockle.world>
Date: Mon, 21 Jul 2025 14:42:26 -0500
Subject: [PATCH] improvements

---
 prosperon/clay.cm      | 13 +++++-----
 prosperon/ease.cm      | 24 ++++++++++++++++++
 prosperon/prosperon.cm | 56 ++++++++++++++++++++++++++++++++++++------
 prosperon/tilemap.cm   |  3 ++-
 prosperon/tween.cm     | 32 +++++++++++++++++++++---
 scripts/graphics.cm    |  2 +-
 6 files changed, 110 insertions(+), 20 deletions(-)

diff --git a/prosperon/clay.cm b/prosperon/clay.cm
index 4ee26c94..881e18d9 100644
--- a/prosperon/clay.cm
+++ b/prosperon/clay.cm
@@ -77,13 +77,12 @@ clay.draw = function draw(size, fn, config = {})
     box.boundingbox = Object.assign({}, box.content);
 
     var padding = normalizeSpacing(box.config.padding || 0);
-    if (padding.l || padding.r || padding.t || padding.b) {
-      // Adjust the boundingbox to include the padding
-      box.boundingbox.x -= padding.l;
-      box.boundingbox.y -= padding.t;
-      box.boundingbox.width += padding.l + padding.r;
-      box.boundingbox.height += padding.t + padding.b;
-    }
+    
+    box.boundingbox.x -= padding.l;
+    box.boundingbox.y -= padding.t;
+    box.boundingbox.width += padding.l + padding.r;
+    box.boundingbox.height += padding.t + padding.b;
+
     box.marginbox = Object.assign({}, box.content);
     var margin = normalizeSpacing(box.config.margin || 0);
     box.marginbox.x -= margin.l;
diff --git a/prosperon/ease.cm b/prosperon/ease.cm
index a00376e1..389eb354 100644
--- a/prosperon/ease.cm
+++ b/prosperon/ease.cm
@@ -121,4 +121,28 @@ Ease.elastic = {
 Ease.elastic.c4 = (2 * Math.PI) / 3
 Ease.elastic.c5 = (2 * Math.PI) / 4.5
 
+Ease.zoom = {
+  // Creates a smooth zoom that maintains constant perceptual speed
+  // ratio is the zoom factor (e.g., 10 for 10x zoom)
+  smooth(ratio) {
+    return function(t) {
+      if (t == 0) return 0
+      if (t == 1) return 1
+      if (Math.abs(ratio - 1) < 0.001) return t
+      // Position interpolation formula: (r^t - 1) / (r - 1)
+      return (Math.pow(ratio, t) - 1) / (ratio - 1)
+    }
+  },
+  // Exponential interpolation for zoom values
+  // Interpolates in logarithmic space for smooth visual zoom
+  exp(startZoom, endZoom) {
+    return function(t) {
+      if (t == 0) return startZoom
+      if (t == 1) return endZoom
+      // Scale := Exp(LinearInterpolate(Ln(Scale1), Ln(Scale2), t))
+      return Math.exp(Math.log(startZoom) + t * (Math.log(endZoom) - Math.log(startZoom)))
+    }
+  }
+}
+
 return Ease
\ No newline at end of file
diff --git a/prosperon/prosperon.cm b/prosperon/prosperon.cm
index aa93d502..a4f86d93 100644
--- a/prosperon/prosperon.cm
+++ b/prosperon/prosperon.cm
@@ -199,15 +199,55 @@ function translate_draw_commands(commands) {
         cmd.rect.width = cmd.rect.width * cmd.scale.x
         cmd.rect.height = cmd.rect.height * cmd.scale.y
         cmd.rect = worldToScreenRect(cmd.rect, camera)
-
-        renderer_commands.push({
-          op: "texture",
-          data: {
-            texture_id: gpu,
-            dst: cmd.rect,
-            src: img.rect
+        
+        if (cmd.info && (cmd.info.tile_x || cmd.info.tile_y)) {
+          // Use tiling functionality
+          var tile_buffer = geometry.tile(
+            img,
+            img.rect,  // source rect in UV coords
+            cmd.rect,  // destination rect in screen coords
+            {
+              repeat_x: cmd.info.tile_x || false,
+              repeat_y: cmd.info.tile_y || false
+            }
+          )
+          
+          if (tile_buffer) {
+            // Transform XY coordinates using camera matrix
+            var camera_params = [camera.a, camera.c, camera.e, camera.f]
+            var transformed_xy = geometry.transform_xy_blob(tile_buffer.xy, camera_params)
+            
+            // Create transformed geometry object
+            var transformed_geom = {
+              xy: transformed_xy,
+              xy_stride: tile_buffer.xy_stride,
+              uv: tile_buffer.uv,
+              uv_stride: tile_buffer.uv_stride,
+              color: tile_buffer.color,
+              color_stride: tile_buffer.color_stride,
+              indices: tile_buffer.indices,
+              num_vertices: tile_buffer.num_vertices,
+              num_indices: tile_buffer.num_indices,
+              size_indices: tile_buffer.size_indices,
+              texture_id: gpu
+            }
+            
+            renderer_commands.push({
+              op: "geometry_raw",
+              data: transformed_geom
+            })
           }
-        })
+        } else {
+          // Normal non-tiled rendering
+          renderer_commands.push({
+            op: "texture",
+            data: {
+              texture_id: gpu,
+              dst: cmd.rect,
+              src: img.rect
+            }
+          })
+        }
         
         break
         
diff --git a/prosperon/tilemap.cm b/prosperon/tilemap.cm
index 05252dfc..b935a256 100644
--- a/prosperon/tilemap.cm
+++ b/prosperon/tilemap.cm
@@ -158,7 +158,8 @@ tilemap.prototype =
     this._dirty = false;
   },
 
-  draw(pos = {x: 0, y: 0}) {
+  draw() {
+    var pos = this.pos || {x:0,y:0}
     // Rebuild cache if dirty or position changed
     if (this._dirty || Object.keys(this._geometry_cache).length == 0 || this._last_pos?.x != pos.x || this._last_pos?.y != pos.y) {
       this._build_geometry_cache(pos);
diff --git a/prosperon/tween.cm b/prosperon/tween.cm
index fe97be46..87e0ff7d 100644
--- a/prosperon/tween.cm
+++ b/prosperon/tween.cm
@@ -40,8 +40,18 @@ function Tween(obj) {
 
 Tween.prototype.to = function(props, duration, start_time) {
   for (var key in props) {
-    this.startVals[key] = this.obj[key]
-    this.endVals[key] = props[key]
+    var value = props[key]
+    if (typeof value == 'object' && value != null && !Array.isArray(value)) {
+      // Handle nested objects by flattening them
+      for (var subkey in value) {
+        var flatKey = key + '.' + subkey
+        this.startVals[flatKey] = this.obj[key] ? this.obj[key][subkey] : undefined
+        this.endVals[flatKey] = value[subkey]
+      }
+    } else {
+      this.startVals[key] = this.obj[key]
+      this.endVals[key] = value
+    }
   }
   this.duration = duration
   
@@ -85,7 +95,23 @@ Tween.prototype.seek = function(global_time) {
   for (var key in this.endVals) {
     var start = this.startVals[key]
     var end = this.endVals[key]
-    this.obj[key] = start + (end - start) * eased
+    var value = start + (end - start) * eased
+    
+    if (key.includes('.')) {
+      // Handle nested object properties
+      var parts = key.split('.')
+      var objKey = parts[0]
+      var subKey = parts[1]
+      
+      // Ensure the nested object exists
+      if (!this.obj[objKey]) {
+        this.obj[objKey] = {}
+      }
+      
+      this.obj[objKey][subKey] = value
+    } else {
+      this.obj[key] = value
+    }
   }
 
   if (t == 1 && this.engine) {
diff --git a/scripts/graphics.cm b/scripts/graphics.cm
index e17725fd..0fcffc41 100644
--- a/scripts/graphics.cm
+++ b/scripts/graphics.cm
@@ -312,7 +312,7 @@ graphics.texture = function texture(path) {
   if (!cache[id]) {
     var ipath = res.find_image(id)
     if (!ipath)
-      throw new Error(`unknown image ${id}`)
+      return graphics.texture('notex')
     
     var result = create_image(ipath)
     cache[id] = result