From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Tue, 17 Sep 2002 21:27:46 +0000 (+0000)
Subject: added R_CalcBeamVerts function, calculates vertex array for beam polygon
X-Git-Tag: RELEASE_0_2_0_RC1~231
X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=commitdiff_plain;h=e5b201e7175b0c9bd5676115ea41693b4e3b55cb

added R_CalcBeamVerts function, calculates vertex array for beam polygon


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@2385 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/gl_rmain.c b/gl_rmain.c
index 0b211789..56b902ad 100644
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -823,3 +823,33 @@ void R_DrawNoModel(entity_render_t *ent)
 	//	R_DrawNoModelCallback(ent, 0);
 }
 
+void R_CalcBeamVerts (float *vert, vec3_t org1, vec3_t org2, float width)
+{
+	vec3_t right1, right2, diff, normal;
+
+	VectorSubtract (org2, org1, normal);
+	VectorNormalizeFast (normal);
+
+	// calculate 'right' vector for start
+	VectorSubtract (r_origin, org1, diff);
+	VectorNormalizeFast (diff);
+	CrossProduct (normal, diff, right1);
+
+	// calculate 'right' vector for end
+	VectorSubtract (r_origin, org2, diff);
+	VectorNormalizeFast (diff);
+	CrossProduct (normal, diff, right2);
+
+	vert[ 0] = org1[0] + width * right1[0];
+	vert[ 1] = org1[1] + width * right1[1];
+	vert[ 2] = org1[2] + width * right1[2];
+	vert[ 4] = org1[0] - width * right1[0];
+	vert[ 5] = org1[1] - width * right1[1];
+	vert[ 6] = org1[2] - width * right1[2];
+	vert[ 8] = org2[0] - width * right2[0];
+	vert[ 9] = org2[1] - width * right2[1];
+	vert[10] = org2[2] - width * right2[2];
+	vert[12] = org2[0] + width * right2[0];
+	vert[13] = org2[1] + width * right2[1];
+	vert[14] = org2[2] + width * right2[2];
+}
diff --git a/render.h b/render.h
index 720a4564..76400a72 100644
--- a/render.h
+++ b/render.h
@@ -172,5 +172,7 @@ void R_Stain (vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, i
 
 void R_DrawCrosshair(void);
 
+void R_CalcBeamVerts (float *vert, vec3_t org1, vec3_t org2, float width);
+
 #endif