ddnet/src/game/client/gc_effects.cpp

#include <engine/e_client_interface.h>
#include "gc_client.h"
#include "../generated/gc_data.h"

static bool add_trail = false;

void effect_air_jump(vec2 pos)
{
	particle p;
	p.set_default();
	p.spr = SPRITE_PART_AIRJUMP;
	p.pos = pos + vec2(-6.0f, 16.0f);
	p.vel = vec2(0, -200);
	p.life_span = 0.5f;
	p.start_size = 48.0f;
	p.end_size = 0;
	p.rot = frandom()*pi*2;
	p.rotspeed = pi*2;
	p.gravity = 500;
	p.friction = 0.7f;
	p.flow_affected = 0.0f;
	particle_add(PARTGROUP_GENERAL, &p);

	p.pos = pos + vec2(6.0f, 16.0f);
	particle_add(PARTGROUP_GENERAL, &p);
}

void effect_powerupshine(vec2 pos, vec2 size)
{
	if(!add_trail)
		return;
		
	particle p;
	p.set_default();
	p.spr = SPRITE_PART_SLICE;
	p.pos = pos + vec2((frandom()-0.5f)*size.x, (frandom()-0.5f)*size.y);
	p.vel = vec2(0, 0);
	p.life_span = 0.5f;
	p.start_size = 16.0f;
	p.end_size = 0;
	p.rot = frandom()*pi*2;
	p.rotspeed = pi*2;
	p.gravity = 500;
	p.friction = 0.9f;
	p.flow_affected = 0.0f;
	particle_add(PARTGROUP_GENERAL, &p);
}

void effect_smoketrail(vec2 pos, vec2 vel)
{
	if(!add_trail)
		return;
		
	particle p;
	p.set_default();
	p.spr = SPRITE_PART_SMOKE;
	p.pos = pos;
	p.vel = vel + random_dir()*50.0f;
	p.life_span = 0.5f + frandom()*0.5f;
	p.start_size = 12.0f + frandom()*8;
	p.end_size = 0;
	p.friction = 0.7;
	p.gravity = frandom()*-500.0f;
	particle_add(PARTGROUP_PROJECTILE_TRAIL, &p);
}


void effect_bullettrail(vec2 pos)
{
	if(!add_trail)
		return;
		
	particle p;
	p.set_default();
	p.spr = SPRITE_PART_BALL;
	p.pos = pos;
	p.life_span = 0.25f + frandom()*0.25f;
	p.start_size = 8.0f;
	p.end_size = 0;
	p.friction = 0.7;
	particle_add(PARTGROUP_PROJECTILE_TRAIL, &p);
}

void effect_playerspawn(vec2 pos)
{
	for(int i = 0; i < 32; i++)
	{
		particle p;
		p.set_default();
		p.spr = SPRITE_PART_SHELL;
		p.pos = pos;
		p.vel = random_dir() * (pow(frandom(), 3)*600.0f);
		p.life_span = 0.3f + frandom()*0.3f;
		p.start_size = 64.0f + frandom()*32;
		p.end_size = 0;
		p.rot = frandom()*pi*2;
		p.rotspeed = frandom();
		p.gravity = frandom()*-400.0f;
		p.friction = 0.7f;
		p.color = vec4(0xb5/255.0f, 0x50/255.0f, 0xcb/255.0f, 1.0f);
		particle_add(PARTGROUP_GENERAL, &p);
		
	}
}

void effect_playerdeath(vec2 pos)
{
	for(int i = 0; i < 64; i++)
	{
		particle p;
		p.set_default();
		p.spr = SPRITE_PART_SPLAT01 + (rand()%3);
		p.pos = pos;
		p.vel = random_dir() * ((frandom()+0.1f)*900.0f);
		p.life_span = 0.3f + frandom()*0.3f;
		p.start_size = 24.0f + frandom()*16;
		p.end_size = 0;
		p.rot = frandom()*pi*2;
		p.rotspeed = (frandom()-0.5f) * pi;
		p.gravity = 800.0f;
		p.friction = 0.8f;
		p.color = mix(vec4(0.75f,0.2f,0.2f,0.75f), vec4(0.5f,0.1f,0.1f,0.75f), frandom());
		particle_add(PARTGROUP_GENERAL, &p);
		
	}
}


void effect_explosion(vec2 pos)
{
	// add to flow
	for(int y = -8; y <= 8; y++)
		for(int x = -8; x <= 8; x++)
		{
			if(x == 0 && y == 0)
				continue;
			
			float a = 1 - (length(vec2(x,y)) / length(vec2(8,8)));
			flow_add(pos+vec2(x,y)*16, normalize(vec2(x,y))*5000.0f*a, 10.0f);
		}
		
	// add the explosion
	particle p;
	p.set_default();
	p.spr = SPRITE_PART_EXPL01;
	p.pos = pos;
	p.life_span = 0.4f;
	p.start_size = 150.0f;
	p.end_size = 0;
	p.rot = frandom()*pi*2;
	particle_add(PARTGROUP_EXPLOSIONS, &p);
	
	// add the smoke
	for(int i = 0; i < 24; i++)
	{
		particle p;
		p.set_default();
		p.spr = SPRITE_PART_SMOKE;
		p.pos = pos;
		p.vel = random_dir() * ((1.0f + frandom()*0.2f) * 1000.0f);
		p.life_span = 0.5f + frandom()*0.4f;
		p.start_size = 32.0f + frandom()*8;
		p.end_size = 0;
		p.gravity = frandom()*-800.0f;
		p.friction = 0.4f;
		p.color = mix(vec4(0.75f,0.75f,0.75f,1.0f), vec4(0.5f,0.5f,0.5f,1.0f), frandom());
		particle_add(PARTGROUP_GENERAL, &p);
	}
}

void effects_update()
{
	static float last_update = 0;
	if(client_localtime()-last_update > 0.02f)
	{
		add_trail = true;
		last_update = client_localtime();
		flow_update();
	}
	else
		add_trail = false;
		
}