'\" t
.\"     Title: s3d_angle_to_cam
.\"    Author: Simon Wunderlich
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.\"    Manual: s3d Manual
.\"    Source: s3d
.\"  Language: English
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.TH "S3D_ANGLE_TO_CAM" "3" "" "s3d" "s3d Manual"
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.SH "NAME"
s3d_angle_to_cam \- calculate angle between vector and cam
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <s3d\&.h>
.fi
.ft
.HP \w'float\ s3d_angle_to_cam('u
.BI "float s3d_angle_to_cam(const\ float\ " "obj_pos" "[], const\ float\ " "cam_pos" "[], float\ *" "angle_rad" ");"
.SH "DESCRIPTION"
.PP
Given obj_pos and cam_pos in the format float[3], angle_rad about which angle the object should be rotated around the y\-axis so that it faces the camera\&. This might become handy if you have some text floating in space and want it to face the camera\&. http://en\&.wikipedia\&.org/wiki/Vector_(spatial)
.SH "AUTHOR"
.PP
\fBSimon Wunderlich\fR
.RS 4
Author of s3d
.RE