From 12efa1d9e0ff3a32b018ee83d6ebee08c77972a9 Mon Sep 17 00:00:00 2001
From: rodri <rgl@antares-labs.eu>
Date: Sat, 19 Oct 2024 11:42:51 +0000
Subject: remove quaternion sandwich utils (now part of libgeometry.)

---
 graphics.h |  6 ++++--
 render.c   |  3 ++-
 util.c     | 15 ---------------
 3 files changed, 6 insertions(+), 18 deletions(-)

diff --git a/graphics.h b/graphics.h
index 8d62e76..e58aca9 100644
--- a/graphics.h
+++ b/graphics.h
@@ -150,6 +150,8 @@ struct LightSource
 	/* spotlights */
 	double θu;	/* umbra angle. anything beyond is unlit */
 	double θp;	/* penumbra angle. anything within is fully lit */
+
+	LightSource *prev, *next;
 };
 
 struct Material
@@ -199,6 +201,8 @@ struct Scene
 	char *name;
 	Entity ents;
 	ulong nents;
+	LightSource lights;
+	ulong nlights;
 	Cubemap *skybox;
 
 	void (*addent)(Scene*, Entity*);
@@ -446,8 +450,6 @@ Point3 modulapt3(Point3, Point3);
 Point3 minpt3(Point3, Point3);
 Point3 maxpt3(Point3, Point3);
 int eqpt3(Point3, Point3);
-Quaternion qsandwich(Quaternion, Quaternion);
-Point3 qsandwichpt3(Quaternion, Point3);
 Memimage *rgba(ulong);
 Memimage *dupmemimage(Memimage*);
 
diff --git a/render.c b/render.c
index 5d0954b..3f96f42 100644
--- a/render.c
+++ b/render.c
@@ -179,7 +179,7 @@ rasterize(Rastertask *task)
 	double dplen, perc;
 	float z, pcz;
 	uint ropts;
-	int steep = 0, Δe, e, Δy;
+	int steep, Δe, e, Δy;
 
 	params = task->params;
 	prim = &task->p;
@@ -233,6 +233,7 @@ rasterize(Rastertask *task)
 		if(rectclipline(task->wr, &p0, &p1, &prim->v[0], &prim->v[1]) < 0)
 			break;
 
+		steep = 0;
 		/* transpose the points */
 		if(abs(p0.x-p1.x) < abs(p0.y-p1.y)){
 			steep = 1;
diff --git a/util.c b/util.c
index 8aeaaf2..ff76ab9 100644
--- a/util.c
+++ b/util.c
@@ -91,21 +91,6 @@ eqpt3(Point3 a, Point3 b)
 	return vec3len(subpt3(a, b)) < ε2;
 }
 
-Quaternion
-qsandwich(Quaternion q, Quaternion p)
-{
-	return mulq(mulq(q, p), invq(q));
-}
-
-Point3
-qsandwichpt3(Quaternion q, Point3 p)
-{
-	Quaternion r;
-
-	r = qsandwich(q, Quatvec(0, p));
-	return Pt3(r.i, r.j, r.k, p.w);
-}
-
 void
 memsetf(void *dp, float v, usize len)
 {
-- 
cgit v1.2.3