how to create a laser beam

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how to create a laser beam #410669 11/07/12 00:17 11/07/12 00:17
Joined: Jul 2011 Posts: 69 P pjotr987 OP Junior Member
pjotr987 OP Junior Member P Joined: Jul 2011 Posts: 69	Hi guys, i want to create something like laser beam, whose spot size is decreasing the more distant the hit object is. my aim is to create something like a distance measuring simulation. Depending on the beam spot size the distance to an object should be calculated. can me help someone to get a with distance decreasing laser beam spot. thanks in advance

Re: how to create a laser beam [Re: pjotr987] #410671 11/07/12 00:36 11/07/12 00:36
Joined: Jan 2002 Posts: 4,225 Germany / Essen Uhrwerk Expert
Uhrwerk Expert Joined: Jan 2002 Posts: 4,225 Germany / Essen	You can measure the distance with c_trace and create a beam with a particle that got its BEAM flag set. You then need done additional particle at the end of the beam and increase its size with growing distance. Always learn from history, to be sure you make the same mistakes again...

Re: how to create a laser beam [Re: Uhrwerk] #410812 11/09/12 13:05 11/09/12 13:05
Joined: Jul 2011 Posts: 69 P pjotr987 OP Junior Member
pjotr987 OP Junior Member P Joined: Jul 2011 Posts: 69	is there any piece of code that throws a spot (like a spot of a laser) on hit surface?. this spot radius should decrease with the increasing distance of the hit area. like a spot of a torch, that is big if it hits a close wall and gets smaller if the wall is more distant. somehow i dont know how to start. any help will be approciated thanks in advance

Re: how to create a laser beam [Re: pjotr987] #410816 11/09/12 13:48 11/09/12 13:48
Joined: Sep 2003 Posts: 6,861 Kiel (Germany) Superku Senior Expert
Superku Senior Expert Joined: Sep 2003 Posts: 6,861 Kiel (Germany)	It will automatically get smaller because of perspective, but you can do it manually, too (however, this would be unrealistic). Uhrwerk already told you how to achieve it, check the manual for c_trace(), vec_rotate(), hit.x/ "target" and effect() or ent_decal(). "Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual Check out my new game: Pogostuck: Rage With Your Friends

Re: how to create a laser beam [Re: Superku] #411038 11/12/12 13:51 11/12/12 13:51
Joined: Jul 2011 Posts: 69 P pjotr987 OP Junior Member
pjotr987 OP Junior Member P Joined: Jul 2011 Posts: 69	thanks for replies guys. finaly i managed to plot a white circle (png sprite) on the c_trace hitted place. the thing now is, that this circle is alleays round. i want to stretch it in one axis according to the angle the beam hits the wall (to make it look more realistic). so now i have to get the angle with which the c_race is hitting the wall. can someone give me an idea how to get this angle. thanks in advance

Re: how to create a laser beam [Re: pjotr987] #411040 11/12/12 13:56 11/12/12 13:56
Joined: Oct 2011 Posts: 1,082 Germany C Ch40zzC0d3r Serious User
Ch40zzC0d3r Serious User C Joined: Oct 2011 Posts: 1,082 Germany	Originally Posted By: pjotr987 thanks for replies guys. finaly i managed to plot a white circle (png sprite) on the c_trace hitted place. the thing now is, that this circle is alleays round. i want to stretch it in one axis according to the angle the beam hits the wall (to make it look more realistic). so now i have to get the angle with which the c_race is hitting the wall. can someone give me an idea how to get this angle. thanks in advance Use the normal vector

Re: how to create a laser beam [Re: Ch40zzC0d3r] #411042 11/12/12 14:19 11/12/12 14:19
Joined: Jul 2011 Posts: 69 P pjotr987 OP Junior Member
pjotr987 OP Junior Member P Joined: Jul 2011 Posts: 69	so the normalvector seems to be a step in the right direction, but i still dont get the right angle with which the c_trace hits the wall. the code below delivers only angles in 90� steps (90,180 and 270) and not the real angle. var winkel=my.pan; vec_to_angle(winkel, normal); any ideas how to solve it? thanks for any help

Re: how to create a laser beam [Re: Ch40zzC0d3r] #411043 11/12/12 14:20 11/12/12 14:20
Joined: Sep 2003 Posts: 6,861 Kiel (Germany) Superku Senior Expert
Superku Senior Expert Joined: Sep 2003 Posts: 6,861 Kiel (Germany)	You will need to use a (sprite) entity or ent_decal (where the latter is probably the better choice), particles do not support angles. "Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual Check out my new game: Pogostuck: Rage With Your Friends

Re: how to create a laser beam [Re: pjotr987] #411044 11/12/12 14:22 11/12/12 14:22
Joined: Jan 2002 Posts: 4,225 Germany / Essen Uhrwerk Expert
Uhrwerk Expert Joined: Jan 2002 Posts: 4,225 Germany / Essen	You cannot use a fixed skalar where an angle is expected. The functions signature is vec_to_angle(ANGLE* ang, VECTOR* dir). Always learn from history, to be sure you make the same mistakes again...

Re: how to create a laser beam [Re: Uhrwerk] #411051 11/12/12 16:05 11/12/12 16:05
Joined: Oct 2011 Posts: 1,082 Germany C Ch40zzC0d3r Serious User
Ch40zzC0d3r Serious User C Joined: Oct 2011 Posts: 1,082 Germany	lol, Change the vel_x, y, z... Last edited by Ch40zzC0d3r; 11/12/12 16:05.