sm-zombiereloaded-3/src/zr/knockback.inc

201 lines
5.9 KiB
SourcePawn

/*
* ============================================================================
*
* Zombie:Reloaded
*
* File: knockback.inc
* Type: Module
* Description: Handles knockback on clients.
*
* Copyright (C) 2009 Greyscale, Richard Helgeby
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ============================================================================
*/
/** Client has been hurt.
*
* @param client The client index. (zombie)
* @param attacker The attacker index. (human)
* @param weapon The weapon used.
* @param hitgroup Hitgroup attacker has damaged.
* @param dmg_health Damage done.
*/
KnockbackOnClientHurt(client, attacker, const String:weapon[], hitgroup, dmg_health)
{
// If attacker is invalid, then stop.
if (!ZRIsClientValid(attacker))
{
return;
}
// Client is a human, then stop.
if (InfectIsClientHuman(client))
{
return;
}
// If attacker is a zombie, then stop.
if (InfectIsClientInfected(attacker))
{
return;
}
// Get zombie knockback value.
new Float:knockback = ClassGetKnockback(client);
new Float:clientloc[3];
new Float:attackerloc[3];
GetClientAbsOrigin(client, clientloc);
// Check if a grenade was thrown.
if (StrEqual(weapon, "hegrenade"))
{
// Get the location of the grenade.
if (KnockbackFindExplodingGrenade(attackerloc) == -1)
{
// If the grenade wasn't found, then stop.
return;
}
}
else
{
// Get attackers eye position.
GetClientEyePosition(attacker, attackerloc);
// Get attackers eye angles.
new Float:attackerang[3];
GetClientEyeAngles(attacker, attackerang);
// Calculate knockback end-vector.
TR_TraceRayFilter(attackerloc, attackerang, MASK_ALL, RayType_Infinite, KnockbackTRFilter);
TR_GetEndPosition(clientloc);
}
new bool:weapons = GetConVarBool(g_hCvarsList[CVAR_WEAPONS]);
if (weapons)
{
new weaponindex = WeaponsNameToIndex(weapon);
if (weaponindex != -1)
{
// Apply weapon knockback multiplier.
knockback *= WeaponsGetKnockback(weaponindex);
}
}
new bool:hitgroups = GetConVarBool(g_hCvarsList[CVAR_HITGROUPS]);
if (hitgroups)
{
new hitgroupindex = HitgroupToIndex(hitgroup);
if (hitgroupindex != -1)
{
// Apply hitgroup knockback multiplier.
knockback *= HitgroupsGetKnockback(hitgroupindex);
}
}
// Apply damage knockback multiplier.
knockback *= float(dmg_health);
// Apply knockback.
KnockbackSetVelocity(client, attackerloc, clientloc, knockback);
}
/**
* Sets velocity on a player.
*
* @param client The client index.
* @param startpoint The starting coordinate to push from.
* @param endpoint The ending coordinate to push towards.
* @param magnitude Magnitude of the push.
*/
KnockbackSetVelocity(client, const Float:startpoint[3], const Float:endpoint[3], Float:magnitude)
{
// Create vector from the given starting and ending points.
new Float:vector[3];
MakeVectorFromPoints(startpoint, endpoint, vector);
// Normalize the vector (equal magnitude at varying distances).
NormalizeVector(vector, vector);
// Apply the magnitude by scaling the vector (multiplying each of its components).
ScaleVector(vector, magnitude);
// ADD the given vector to the client's current velocity.
ToolsClientVelocity(client, vector);
}
/**
* Trace Ray forward, used as a filter to continue tracing if told so. (See sdktools_trace.inc)
*
* @param entity The entity index.
* @param contentsMask The contents mask.
* @return True to allow hit, false to continue tracing.
*/
public bool:KnockbackTRFilter(entity, contentsMask)
{
// If entity is a player, continue tracing.
if (entity > 0 && entity < MAXPLAYERS)
{
return false;
}
// Allow hit.
return true;
}
/**
* Find the location of an exploding grenade (currently inflicting damage in player_hurt).
*
* @param heLoc The location of the exploding grenade.
* @return The entity index of the grenade.
*/
KnockbackFindExplodingGrenade(Float:heLoc[3])
{
decl String:classname[64];
// Find max entities and loop through all of them.
new maxentities = GetMaxEntities();
for (new x = MaxClients; x <= maxentities; x++)
{
// If entity is invalid, then stop.
if (!IsValidEdict(x))
{
continue;
}
// If entity isn't a grenade, then stop.
GetEdictClassname(x, classname, sizeof(classname));
if (!StrEqual(classname, "hegrenade_projectile", false))
{
continue;
}
// If m_takedamage is set to 0, we found our grenade.
new takedamage = GetEntProp(x, Prop_Data, "m_takedamage");
if (takedamage == 0)
{
// Return its location.
GetEntPropVector(x, Prop_Send, "m_vecOrigin", heLoc);
// Return its entity index.
return x;
}
}
// Didn't find the grenade.
return -1;
}