From e49c0ac340da53f3460a2aa02b514340ab0866e0 Mon Sep 17 00:00:00 2001
From: Jesper Jensen <jesper@jnsn.dev>
Date: Sun, 29 Mar 2026 12:07:19 +0200
Subject: Start testing as a cad tool

---
 examples/mount.c        | 119 ++++++++++++++++++++++++++++++++++++++++++++++++
 examples/triangle_tip.c |   2 +-
 2 files changed, 120 insertions(+), 1 deletion(-)
 create mode 100644 examples/mount.c

(limited to 'examples')

diff --git a/examples/mount.c b/examples/mount.c
new file mode 100644
index 0000000..7ffdc34
--- /dev/null
+++ b/examples/mount.c
@@ -0,0 +1,119 @@
+#include "cad.h"
+
+void draw_from_constraints(struct constraints *c, struct topology *t, struct canvas *cv) {
+	struct drawing drawing = {};
+	struct subassembly assemblies[16] = {};
+	size_t assemblies_num;
+	bool rc = solve_constraints(c, &drawing, assemblies, &assemblies_num);
+	assert(rc);
+
+	// Copy over all the parameter values to a new array
+	// @PERF: Maybe we should just store them in a separate array to start with
+	double *params = malloc(sizeof(double) * (c->length));
+	for(size_t i = 0; i < c->length; i++) {
+		params[i] = c->elements[i].v;
+	}
+
+	place_points(&drawing, params);
+	free(params);
+
+	reconstruct_drawing(c, assemblies, &assemblies_num);
+
+	begin_drawing(cv);
+	draw_topology(cv, t);
+	draw_constraints(cv, c);
+	end_drawing(cv);
+
+	free_drawing(&drawing);
+}
+
+int main(int argc, char *argv[]) {
+	struct constraints constraints = {};
+	struct topology topo = {};
+
+	struct component mid_bot = {.type = COM_POINT};
+	struct component pseudo = {.type = COM_POINT};
+	struct component bot = {.type = COM_LINE};
+
+	struct component symmetry = {.type = COM_LINE};
+
+	struct component right_lower = {.type = COM_LINE};
+	struct component left_lower = {.type = COM_LINE};
+
+	struct component right_under_hole_mid = {.type = COM_POINT};
+
+	struct component right_hole_bot_tan = {.type = COM_LINE};
+	struct component left_hole_bot_tan = {.type = COM_LINE};
+	struct component right_hole_top_tan = {.type = COM_LINE};
+	struct component left_hole_top_tan = {.type = COM_LINE};
+
+	struct component right_hole_mid = {.type = COM_POINT};
+	struct component left_hole_mid = {.type = COM_POINT};
+
+	struct component swoop_mid = {.type = COM_POINT};
+	struct component swoop_top_tan = {.type = COM_POINT};
+
+	struct component left_bend = {.type = COM_POINT};
+	struct component lb2 = {.type = COM_POINT};
+
+	struct component l1 = {.type = COM_LINE};
+
+	add_constraint(&constraints, (struct constraint[]){
+		PP_DISTANCE(&mid_bot, &pseudo, 10),
+		POINT_ON_LINE(&mid_bot, &bot),
+		POINT_ON_LINE(&pseudo, &bot),
+
+		LL_ANGLE(&bot, &symmetry, DEG(90)),
+		POINT_ON_LINE(&mid_bot, &symmetry),
+
+		// @HACK This is going in the wrong direction?
+		PL_DISTANCE(&mid_bot, &right_lower, 35),
+		LL_ANGLE(&bot, &right_lower, DEG(-90)),
+		PL_DISTANCE(&left_lower, &mid_bot, 35),
+		LL_ANGLE(&bot, &left_lower, DEG(90)),
+
+		PL_DISTANCE(&right_hole_mid, &bot, 80),
+		PL_DISTANCE(&left_hole_mid, &bot, 80),
+		PL_DISTANCE(&right_hole_mid, &symmetry, -60),
+		PL_DISTANCE(&left_hole_mid, &symmetry, 60),
+
+		PL_DISTANCE(&right_under_hole_mid, &right_lower, 20),
+		PL_DISTANCE(&right_under_hole_mid, &right_hole_bot_tan, 20),
+
+		LL_ANGLE(&right_hole_bot_tan, &symmetry, DEG(270)),
+
+		PL_DISTANCE(&right_hole_mid, &right_hole_bot_tan, -28),
+		// PL_DISTANCE(&left_hole_mid, &left_hole_bot_tan, 56),
+		PL_DISTANCE(&right_hole_mid, &right_hole_top_tan, 28),
+		// PL_DISTANCE(&left_hole_mid, &left_hole_top_tan, 56),
+
+		POINT_ON_LINE(&swoop_mid, &symmetry),
+		PP_DISTANCE(&swoop_mid, &right_hole_mid, 120 - 28),
+		// PL_DISTANCE(&swoop_mid, &swoop_top_tan, 120),
+		PL_DISTANCE(&swoop_mid, &right_hole_top_tan, 120),
+
+
+		// Make a triangle
+		CEND(),
+	});
+
+	add_fragment(&topo, (struct topology_elem[]){
+		TOPO_MOVETO(&mid_bot),
+		TOPO_LINETO(&right_hole_mid),
+
+		TOPO_MOVETO(&mid_bot),
+		// TOPO_LINETO(&p2),
+		// TOPO_LINETO(&p3),
+		TOPO_END(),
+	});
+
+	struct canvas canvas = {
+		.state = CANVAS_INIT,
+		.f = stdout,
+	};
+
+	draw_from_constraints(&constraints, &topo, &canvas);
+
+	free_constraints(&constraints);
+	return 0;
+}
diff --git a/examples/triangle_tip.c b/examples/triangle_tip.c
index b6fcf99..4da57da 100644
--- a/examples/triangle_tip.c
+++ b/examples/triangle_tip.c
@@ -52,7 +52,7 @@ int main(int argc, char *argv[]) {
 		POINT_ON_LINE(&p2, &t1base),
 
 		POINT_ON_LINE(&p1, &t1bas2),
-		LL_ANGLE(&t1base, &t1bas2, DEG(-10)),
+		LL_ANGLE(&t1base, &t1bas2, DEG(-5)),
 
 		// With another triangle sharing a point
 		PP_DISTANCE(&p4, &p5, 30),
-- 
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