Visualized LineTrace for GZDoom

A mini-library / example for the GZDoom engine that adds functions to draw a series of particles between two coordinates, and a version of LineTrace() that is visualized with those particles. Free to use, do whatever you want with it, no need to ask me.

The functions are static, contained within the JGP_VisualTrace.

FireVisualTracer(Actor originator, double dist, int flags = 0, double partDist = 1, int partTics = 1, color partColor = color("00FF00"))

Fires a LineTrace from the originator and draws particle along its length. Parameters:

• originator — the actor the trace originates from. If it's a PlayerPawn, it'll fire fire from its eye height (matching the position of its crosshair), otherwise fires from actor center.

• dist — the distance of the trace

• flags — same flags as LineTrace() uses

• partDist — distance between particles

• partTics — how long the particles should exist

• partColor — the color of the particles.

DrawParticlesBetweenPoints(vector3 startpos, vector3 endpos, double partDist = 1, int partTics = 1, color partColor = color("00FF00"), int flags = SPF_FULLBRIGHT|SPF_NOTIMEFREEZE)

Draws a line of particles between two points. FireVisualTracer utilizes this function.

Parameters:

• startpos — coordinates of the first point

• endpos — coordinates of the last point

• partDist — distance between particles

• partTics — how long the particles should exist

• partColor — the color of the particles.

• flags — same flags as A_SpawnParticle uses. SPF_FULLBRIGHT and SPF_NOTIMEFREEZE are enabled by default.

Comes with two examples: JGP_TraceFromFace (an item that will fire a linetrace in the direction its owner is looking) and JGP_ZombiemanWithTrace (a Zombieman that constantly fires a trace wherever it's aiming).