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Random Spray (Angle)
#406509
08/22/12 09:16
08/22/12 09:16
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Joined: Jul 2008
Posts: 168
82RJZAE
OP
Member
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OP
Member
Joined: Jul 2008
Posts: 168
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Hi, how might I add randomness to the angle of a bullet (c_trace bullet) originating from camera.x to simulate bullet spread? I am using the below method to create bullets: bullet_create(camera.x,camera.pan,500);
void bullet_create(VECTOR* vpos,VECTOR* vang,var speed)
{
var alive = 16;
VECTOR pos,temp,vel;
vec_set(pos,vpos);
vec_set(vel,vector(speed,0,0));
vec_rotate(vel,vang);
while(alive > 0)
{
// calculate new position
vec_set(temp,vel);
vec_scale(temp,time_step);
vec_add(temp,pos);
c_trace(pos,temp,IGNORE_PASSABLE | USE_POLYGON); // optional: SCAN_TEXTURE
if(trace_hit)
{
/*if(you) ... // reduce health, blood effect
else ... // spark effect*/
alive = 0;
}
effect(p_bullet,1,pos,vel); // you may want to shorten vel on impact
vec_set(pos,temp); // move to new position
alive -= time_step;
wait(1);
}
}
My apologies I am not too familiar with vector mathematics.
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Re: Random Spray (Angle)
[Re: MasterQ32]
#406513
08/22/12 11:30
08/22/12 11:30
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Joined: May 2009
Posts: 5,377
Caucasus
3run
Senior Expert
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Senior Expert
Joined: May 2009
Posts: 5,377
Caucasus
|
Here is how I've edited that function for my old project:
// accuracy:
var wpn_aim_x = 1; // play with this value
var wpn_aim_y = 1; // play with this value
function bullet_create(VECTOR* vpos, VECTOR* vang, var speed){
var alive = 16;
VECTOR pos;
VECTOR temp;
VECTOR vel;
ANGLE accur;
vec_set(pos, vpos);
vec_set(vel, vector(speed, 0, -3));
vec_set(accur, vector(wpn_aim_x - random(wpn_aim_x * 2), wpn_aim_y - random(wpn_aim_y * 2), 0));
ang_add(accur, vang);
vec_rotate(vel, accur);
while(alive > 0){
// calculate new position
vec_set(temp, vel);
vec_scale(temp, time_step);
vec_add(temp, pos);
trace_mode = IGNORE_PASSABLE | USE_POLYGON | SCAN_TEXTURE;
c_trace(pos, temp, trace_mode);
if(trace_hit){
// check if hit the target:
if(vec_dist(target, nullvector) > 0){
// effect for blocks:
if(hit.entity == NULL){
}
else{
// entity was hit:
}
}
alive = 0;
}
// you may want to shorten vel on impact:
effect(bullet_effect, 1, pos,vel);
// move to new position:
vec_set(pos, temp);
alive -= time_step / 16;
wait(1);
}
}
I use it like this:
bullet_create(muzzle_pos.x, weapon.pan, 400);
// muzzle_pos is the vector where I create muzzle flash effect
Change accuracy of your weapons depending on the player's movement state to make it more realistic 
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