From 2458680ebefea94335973a1431b2acee9762d0ed Mon Sep 17 00:00:00 2001
From: Randall Winkhart <idgr@tutanota.com>
Date: Thu, 6 Aug 2026 23:53:37 -0400
Subject: [PATCH] Enforce minimum angle of 10 degrees

---
 src/c/triangles.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/c/triangles.c b/src/c/triangles.c
index 7d5f159..bb14da4 100644
--- a/src/c/triangles.c
+++ b/src/c/triangles.c
@@ -61,13 +61,8 @@ TriangleLayer *triangle_layer_create(GRect frame, GColor color) {
 	// determine angles
 	uint8_t r1, r2;
 	do {
-		r1 = 1 + (rand() % 179); // 1–178
-		r2 = 1 + (rand() % 179); // 1–178
-		if (r1 > r2) {
-			uint8_t tmp = r1;
-			r1 = r2;
-			r2 = tmp;
-		}
+		r1 = 10 + (rand() % 151);               // 10–160 (angle_A ≥ 10)
+		r2 = (r1 + 10) + (rand() % (161 - r1)); // r1+10 … 170 (angles B,C ≥ 10)
 	} while (r1 == 60 && r2 == 120); // ensure never equilateral
 
 	tri->angle_A = r1;
@@ -86,7 +81,7 @@ TriangleLayer *triangle_layer_create(GRect frame, GColor color) {
 		max_sin = sin_C;
 
 // longest side randomly chosen
-#define MIN_SIDE 20
+#define MIN_SIDE 40
 	uint16_t max_side = (frame.size.w < frame.size.h) ? frame.size.w : frame.size.h;
 	max_side = max_side - 12; // basic margin
 	uint16_t largest_side = MIN_SIDE + (rand() % (max_side - MIN_SIDE + 1));