From d2bfb33071db91a5c781e6f32fe1bc3293d2123c Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Sun, 16 May 2021 16:09:09 -0700
Subject: [PATCH] animate transition from sum to filter node

---
 507line.mu   | 14 ++++++++++++
 hest-life.mu | 61 +++++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 60 insertions(+), 15 deletions(-)

diff --git a/507line.mu b/507line.mu
index b8ee5efb..fadd6639 100644
--- a/507line.mu
+++ b/507line.mu
@@ -93,3 +93,17 @@ fn draw-rect screen: (addr screen), xmin: int, ymin: int, xmax: int, ymax: int,
     loop
   }
 }
+
+# 0 <= u <= 1
+fn line-point u: float, x0: int, x1: int -> _/eax: int {
+  var one/eax: int <- copy 1
+  var u-prime/xmm0: float <- convert one
+  u-prime <- subtract u
+  var result/xmm1: float <- convert x0
+  result <- multiply u-prime
+  var term2/xmm2: float <- convert x1
+  term2 <- multiply u
+  result <- add term2
+  var result/eax: int <- convert result
+  return result
+}
diff --git a/hest-life.mu b/hest-life.mu
index 31154b55..e0124391 100644
--- a/hest-life.mu
+++ b/hest-life.mu
@@ -86,22 +86,46 @@ fn render0 screen: (addr screen), _self: (addr environment) {
   var tick-a/eax: (addr int) <- get self, tick
   set-cursor-position screen, 0x78/x, 0/y
   draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen screen, *tick-a, 7/fg 0/bg
-  # time-variant portion
+  # time-variant portion: 16 repeating steps
   var progress/eax: int <- copy *tick-a
-  progress <- and 7
-  var u/xmm7: float <- convert progress
-  var eight/eax: int <- copy 8
-  var eight-f/xmm0: float <- convert eight
-  u <- divide eight-f
-  # points on conveyers from neighboring cells
-  draw-bezier-point screen, u, 0xa0/x0 0x20/y0, 0x100/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
-  draw-bezier-point screen, u, 0xa0/x0 0x180/y0, 0xc0/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
-  draw-bezier-point screen, u, 0xa0/x0 0x2e0/y0, 0x100/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
-  draw-bezier-point screen, u, 0x200/x0 0x20/y0, 0x180/x1 0x90/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
-  draw-bezier-point screen, u, 0x200/x0 0x2e0/y0, 0x180/x1 0x200/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
-  draw-bezier-point screen, u, 0x360/x0 0x20/y0, 0x180/x1 0xc0/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
-  draw-bezier-point screen, u, 0x360/x0 0x180/y0, 0x35c/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
-  draw-bezier-point screen, u, 0x360/x0 0x2e0/y0, 0x180/x1 0x200/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
+  progress <- and 0xf
+  # 7 time steps for getting inputs to sum
+  {
+    compare progress, 7
+    break-if->=
+    var u/xmm7: float <- convert progress
+    var six/eax: int <- copy 6
+    var six-f/xmm0: float <- convert six
+    u <- divide six-f
+    # points on conveyers from neighboring cells
+    draw-bezier-point screen, u, 0xa0/x0 0x20/y0, 0x100/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
+    draw-bezier-point screen, u, 0xa0/x0 0x180/y0, 0xc0/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
+    draw-bezier-point screen, u, 0xa0/x0 0x2e0/y0, 0x100/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
+    draw-bezier-point screen, u, 0x200/x0 0x20/y0, 0x180/x1 0x90/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
+    draw-bezier-point screen, u, 0x200/x0 0x2e0/y0, 0x180/x1 0x200/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
+    draw-bezier-point screen, u, 0x360/x0 0x20/y0, 0x180/x1 0xc0/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
+    draw-bezier-point screen, u, 0x360/x0 0x180/y0, 0x35c/x1 0x150/ys, 0x180/x2 0x150/ys, 7/color, 4/radius
+    draw-bezier-point screen, u, 0x360/x0 0x2e0/y0, 0x180/x1 0x200/y1, 0x180/x2 0x150/ys, 7/color, 4/radius
+    return
+  }
+  # two time steps for getting count to filter
+  progress <- subtract 7
+  {
+    compare progress, 2
+    break-if->=
+    progress <- increment  # (0, 1) => (1, 2)
+    var u/xmm7: float <- convert progress
+    var three/eax: int <- copy 3
+    var three-f/xmm0: float <- convert three
+    u <- divide three-f
+    draw-linear-point screen, u, 0x180/xs, 0x150/ys, 0x210/xf, 0x190/yf, 7/color, 4/radius
+    set-cursor-position screen, 0x3a/scol, 0x16/srow
+    draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen screen, 3, 0xf/fg 0/bg
+    return
+  }
+  # final 7 time steps for updating output
+  progress <- subtract 2
+  # TODO points on conveyers to outputs
 }
 
 fn draw-bezier-point screen: (addr screen), u: float, x0: int, y0: int, x1: int, y1: int, x2: int, y2: int, color: int, radius: int {
@@ -111,6 +135,13 @@ fn draw-bezier-point screen: (addr screen), u: float, x0: int, y0: int, x1: int,
   draw-disc screen, cx, cy, radius, color, 0xf/border-color=white
 }
 
+fn draw-linear-point screen: (addr screen), u: float, x0: int, y0: int, x1: int, y1: int, color: int, radius: int {
+  var _cy/eax: int <- line-point u, y0, y1
+  var cy/ecx: int <- copy _cy
+  var cx/eax: int <- line-point u, x0, x1
+  draw-disc screen, cx, cy, radius, color, 0xf/border-color=white
+}
+
 fn edit keyboard: (addr keyboard), _self: (addr environment) {
   var self/esi: (addr environment) <- copy _self
   var key/eax: byte <- read-key keyboard