From 5572323a3a4070a32ca82cf018ea312208730d5b Mon Sep 17 00:00:00 2001
From: Jiri Hnidek <jiri.hnidek@tul.cz>
Date: Mon, 8 Sep 2003 12:13:54 +0000
Subject: - added czech translation (cs.po) - changed function drawcircball()
 in source/blender/src/drawobject.c. Circle is computed faster (no 32 calls of
 sin() and cos() each time witch same results).

---
 source/blender/src/drawobject.c | 82 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 72 insertions(+), 10 deletions(-)

(limited to 'source')

diff --git a/source/blender/src/drawobject.c b/source/blender/src/drawobject.c
index 908ff9f45bb..0fbe2aa89df 100644
--- a/source/blender/src/drawobject.c
+++ b/source/blender/src/drawobject.c
@@ -3022,24 +3022,86 @@ static void tekentextcurs(void)
 
 void drawcircball(float *cent, float rad, float tmat[][4])
 {
-	float si, co, phi, dphi, vec[3], vx[3], vy[3];
+	float vec[3], vx[3], vy[3];
 	int a, tot=32;
+
+	/* 32 values of sin function (still same result!) */
+	static float si[32] = {0.00000000,
+		0.20129852,
+		0.39435585,
+		0.57126821,
+		0.72479278,
+		0.84864425,
+		0.93775213,
+		0.98846832,
+		0.99871650,
+		0.96807711,
+		0.89780453,
+		0.79077573,
+		0.65137248,
+		0.48530196,
+		0.29936312,
+		0.10116832,
+		-0.10116832,
+                -0.29936312,
+                -0.48530196,
+                -0.65137248,
+                -0.79077573,
+                -0.89780453,
+                -0.96807711,
+                -0.99871650,
+                -0.98846832,
+                -0.93775213,
+                -0.84864425,
+                -0.72479278,
+                -0.57126821,
+                -0.39435585,
+                -0.20129852,
+		0.00000000};
+	/* 32 values of cos function (still same result!) */
+	static float co[32] ={1.00000000,
+                0.97952994,
+                0.91895781,
+                0.82076344,
+                0.68896691,
+                0.52896401,
+                0.34730525,
+                0.15142777,
+                -0.05064916,
+                -0.25065253,
+                -0.44039415,
+                -0.61210598,
+                -0.75875812,
+                -0.87434661,
+                -0.95413925,
+                -0.99486932,
+                -0.99486932,
+                -0.95413925,
+                -0.87434661,
+                -0.75875812,
+                -0.61210598,
+                -0.44039415,
+                -0.25065253,
+                -0.05064916,
+                0.15142777,
+                0.34730525,
+                0.52896401,
+                0.68896691,
+                0.82076344,
+                0.91895781,
+                0.97952994,
+                1.00000000};
 		
 	VECCOPY(vx, tmat[0]);
 	VECCOPY(vy, tmat[1]);
 	VecMulf(vx, rad);
 	VecMulf(vy, rad);
 	
-	dphi= 2.0*M_PI/tot;
-	phi= 0.0;
-	
 	glBegin(GL_LINE_LOOP);
-	for(a=0; a<tot; a++, phi+= dphi) {
-		si= sin(phi);
-		co= cos(phi);
-		vec[0]= cent[0]+si*vx[0]+co*vy[0];
-		vec[1]= cent[1]+si*vx[1]+co*vy[1];
-		vec[2]= cent[2]+si*vx[2]+co*vy[2];
+	for(a=0; a<tot; a++) {
+		vec[0]= cent[0] + *(si+a) * vx[0] + *(co+a) * vy[0];
+		vec[1]= cent[1] + *(si+a) * vx[1] + *(co+a) * vy[1];
+		vec[2]= cent[2] + *(si+a) * vx[2] + *(co+a) * vy[2];
 		glVertex3fv(vec);
 	}
 	glEnd();
-- 
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