Autowall.cpp

#include "Autowall.h"
#include "Game.h"

#define    HITGROUP_GENERIC    0
#define    HITGROUP_HEAD        1
#define    HITGROUP_CHEST        2
#define    HITGROUP_STOMACH    3
#define HITGROUP_LEFTARM    4    
#define HITGROUP_RIGHTARM    5
#define HITGROUP_LEFTLEG    6
#define HITGROUP_RIGHTLEG    7
#define HITGROUP_GEAR        10

inline bool CGameTrace::DidHitWorld() const
{
	return m_pEnt->GetIndex() == 0;
}

inline bool CGameTrace::DidHitNonWorldEntity() const
{
	return m_pEnt != NULL && !DidHitWorld();
}

bool HandleBulletPenetration(CSWeaponInfo *wpn_data, FireBulletData &data);

float GetHitgroupDamageMult( int iHitGroup )
{
	switch ( iHitGroup )
	{
	case HITGROUP_GENERIC:
		return 0.5f;
	case HITGROUP_HEAD:
		return 2.0f;
	case HITGROUP_CHEST:
		return 0.5f;
	case HITGROUP_STOMACH:
		return 0.75f;
	case HITGROUP_LEFTARM:
		return 0.5f;
	case HITGROUP_RIGHTARM:
		return 0.5f;
	case HITGROUP_LEFTLEG:
		return 0.375f;
	case HITGROUP_RIGHTLEG:
		return 0.375f;
	case HITGROUP_GEAR:
		return 0.5f;
	default:
		return 1.0f;

	}

	return 1.0f;
}

void ScaleDamage( int hitgroup, IClientEntity *enemy, float weapon_armor_ratio, float &current_damage )
{
	current_damage *= GetHitgroupDamageMult( hitgroup );

	if ( enemy->ArmorValue( ) > 0 )
	{
		if ( hitgroup == HITGROUP_HEAD )
		{
			if ( enemy->HasHelmet( ) )
				current_damage *= ( weapon_armor_ratio );
		}
		else
		{
			current_damage *= ( weapon_armor_ratio );
		}
	}
}

bool SimulateFireBullet( IClientEntity *local, CBaseCombatWeapon *weapon, FireBulletData &data )
{
	data.penetrate_count = 4; // Max Amount Of Penitration
	data.trace_length = 0.0f; // wow what a meme
	auto *wpn_data = weapon->GetCSWpnData( ); // Get Weapon Info
	data.current_damage = ( float )wpn_data->iDamage;// Set Damage Memes
	while ( ( data.penetrate_count > 0 ) && ( data.current_damage >= 1.0f ) )
	{
		data.trace_length_remaining = wpn_data->flRange - data.trace_length;
		Vector End_Point = data.src + data.direction * data.trace_length_remaining;
		game::functions.trace_line( data.src, End_Point, 0x4600400B, local, 0, &data.enter_trace );
		game::functions.clip_trace_to_player( data.src, End_Point * 40.f, 0x4600400B, &data.filter, &data.enter_trace );
		if ( data.enter_trace.fraction == 1.0f ) break;
		if ( ( data.enter_trace.hitgroup <= 7 ) && ( data.enter_trace.hitgroup > 0 ) && ( local->GetTeamNum( ) != data.enter_trace.m_pEnt->GetTeamNum( ) ) )
		{
			data.trace_length += data.enter_trace.fraction * data.trace_length_remaining;
			data.current_damage *= pow( wpn_data->flRangeModifier, data.trace_length * 0.002 );
			ScaleDamage( data.enter_trace.hitgroup, data.enter_trace.m_pEnt, wpn_data->flArmorRatio, data.current_damage );
			return true;
		}
		if ( !HandleBulletPenetration( wpn_data, data ) ) break;
	}
	return false;
}

bool HandleBulletPenetration( CSWeaponInfo *wpn_data, FireBulletData &data )
{
	surfacedata_t *enter_surface_data = m_pPhysProps->GetSurfaceData( data.enter_trace.surface.surfaceProps );
	int enter_material = enter_surface_data->game.material;
	float enter_surf_penetration_mod = enter_surface_data->game.flPenetrationModifier;
	data.trace_length += data.enter_trace.fraction * data.trace_length_remaining;
	data.current_damage *= pow( wpn_data->flRangeModifier, ( data.trace_length * 0.002 ) );
	if ( ( data.trace_length > 3000.f ) || ( enter_surf_penetration_mod < 0.1f ) )data.penetrate_count = 0;
	if ( data.penetrate_count <= 0 )return false;
	Vector dummy;
	trace_t trace_exit;
	if ( !game::functions.trace_to_exit( dummy, data.enter_trace, data.enter_trace.endpos, data.direction, &trace_exit ) ) return false;
	surfacedata_t *exit_surface_data = m_pPhysProps->GetSurfaceData( trace_exit.surface.surfaceProps );
	int exit_material = exit_surface_data->game.material;
	float exit_surf_penetration_mod = exit_surface_data->game.flPenetrationModifier;
	float final_damage_modifier = 0.16f;
	float combined_penetration_modifier = 0.0f;
	if ( ( ( data.enter_trace.contents & CONTENTS_GRATE ) != 0 ) || ( enter_material == 89 ) || ( enter_material == 71 ) ) { combined_penetration_modifier = 3.0f; final_damage_modifier = 0.05f; }
	else { combined_penetration_modifier = ( enter_surf_penetration_mod + exit_surf_penetration_mod ) * 0.5f; }
	if ( enter_material == exit_material )
	{
		if ( exit_material == 87 || exit_material == 85 )combined_penetration_modifier = 3.0f;
		else if ( exit_material == 76 )combined_penetration_modifier = 2.0f;
	}
	float v34 = fmaxf( 0.f, 1.0f / combined_penetration_modifier );
	float v35 = ( data.current_damage * final_damage_modifier ) + v34 * 3.0f * fmaxf( 0.0f, ( 3.0f / wpn_data->flPenetration ) * 1.25f );
	float thickness = VectorLength( trace_exit.endpos - data.enter_trace.endpos );
	thickness *= thickness;
	thickness *= v34;
	thickness /= 24.0f;
	float lost_damage = fmaxf( 0.0f, v35 + thickness );
	if ( lost_damage > data.current_damage )return false;
	if ( lost_damage >= 0.0f )data.current_damage -= lost_damage;
	if ( data.current_damage < 1.0f ) return false;
	data.src = trace_exit.endpos;
	data.penetrate_count--;

	return true;
}

bool CanHit(const Vector &point, float *damage_given)
{
	auto *local = m_pEntityList->GetClientEntity(m_pEngine->GetLocalPlayer());
	auto data = FireBulletData(local->GetOrigin() + local->GetViewOffset());
	data.filter = CTraceFilter();
	data.filter.pSkip = local;

	Vector angles;
	game::math.calculate_angle(data.src, point, angles);
	game::math.angle_vectors(angles, data.direction);
	game::math.vector_normalize(data.direction);

	if (SimulateFireBullet(local, (CBaseCombatWeapon*)m_pEntityList->GetClientEntityFromHandle((HANDLE)local->GetActiveWeaponHandle()), data))
	{
		*damage_given = data.current_damage;
		return true;
	}

	return false;
}

bool trace_autowallable(float& dmg) {
	auto m_local = game::localdata.localplayer();

	if (m_local && m_local->IsAlive()) {
		FireBulletData data = FireBulletData(m_local->GetEyePosition());
		data.filter = CTraceFilter();
		data.filter.pSkip = m_local;
		Vector eye_angle; m_pEngine->GetViewAngles(eye_angle);
		Vector dst, forward;
		game::math.angle_vectors(eye_angle, &forward);
		dst = data.src + (forward * 8196.f);
		Vector angles;
		game::math.calculate_angle(data.src, dst, angles);
		game::math.angle_vectors(angles, &data.direction);
		game::math.vector_normalize(data.direction);
		auto m_weapon = m_local->GetWeapon();
		if (m_weapon) {
			data.penetrate_count = 1;
			data.trace_length = 0.0f;
			CSWeaponInfo *weapon_data = m_weapon->GetCSWpnData();
			if (weapon_data) {
				data.current_damage = weapon_data->iDamage;
				data.trace_length_remaining = weapon_data->flRange - data.trace_length;
				Vector end = data.src + data.direction * data.trace_length_remaining;
				game::functions.trace_line(data.src, end, MASK_SHOT | CONTENTS_GRATE, m_local, 0, &data.enter_trace);
				if (data.enter_trace.fraction == 1.0f) return false;

				if (HandleBulletPenetration(weapon_data, data)) {
					dmg = data.current_damage;
					return true;
				}
			}
		}
	}

	return false;
}