From 9f3afae5d12e7847639666b30f3239580dafed28 Mon Sep 17 00:00:00 2001
From: Ian O'Dea <ianodea@gmail.com>
Date: Mon, 7 Jan 2019 10:20:15 -0600
Subject: [PATCH] Make arm_atsam led matrix circular animation circular rather
 than obloid

---
 tmk_core/protocol/arm_atsam/led_matrix.c | 4 +++-
 tmk_core/protocol/arm_atsam/led_matrix.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tmk_core/protocol/arm_atsam/led_matrix.c b/tmk_core/protocol/arm_atsam/led_matrix.c
index 3e07fbe6c..af49db28d 100644
--- a/tmk_core/protocol/arm_atsam/led_matrix.c
+++ b/tmk_core/protocol/arm_atsam/led_matrix.c
@@ -218,6 +218,7 @@ void disp_calc_extents(void)
 
     disp.width = disp.right - disp.left;
     disp.height = disp.top - disp.bottom;
+    disp.max_distance = sqrtf(powf(disp.width, 2) + powf(disp.height, 2));
 }
 
 void disp_pixel_setup(void)
@@ -267,6 +268,7 @@ void led_matrix_run(void)
     float go;
     float bo;
     float po;
+
     uint8_t led_this_run = 0;
     led_setup_t *f = (led_setup_t*)led_setups[led_animation_id];
 
@@ -330,7 +332,7 @@ void led_matrix_run(void)
             {
 
                 if (led_animation_circular) {
-                  po = sqrtf((powf(fabsf(50 - led_cur->py), 2) + powf(fabsf(50 - led_cur->px), 2)));
+                  po = sqrtf((powf(fabsf((disp.width / 2) - (led_cur->x - disp.left)), 2) + powf(fabsf((disp.height / 2) - (led_cur->y - disp.bottom)), 2))) / disp.max_distance * 100;
                 }
                 else {
                   if (led_animation_orientation)
diff --git a/tmk_core/protocol/arm_atsam/led_matrix.h b/tmk_core/protocol/arm_atsam/led_matrix.h
index f0d452834..4513234e7 100644
--- a/tmk_core/protocol/arm_atsam/led_matrix.h
+++ b/tmk_core/protocol/arm_atsam/led_matrix.h
@@ -83,6 +83,7 @@ typedef struct led_disp_s {
     float bottom;
     float width;
     float height;
+    float max_distance;
 } led_disp_t;
 
 uint8_t led_matrix_init(void);