dvander@370: /**
ds@653:  * vim: set ts=4 :
ds@1330:  * =============================================================================
dvander@1231:  * SourceMod
dvander@1231:  * Copyright (C) 2004-2007 AlliedModders LLC.  All rights reserved.
ds@1330:  * =============================================================================
dvander@370:  *
ds@1330:  * This program is free software; you can redistribute it and/or modify it under
ds@1330:  * the terms of the GNU General Public License, version 3.0, as published by the
ds@1330:  * Free Software Foundation.
dvander@1231:  * 
ds@1330:  * This program is distributed in the hope that it will be useful, but WITHOUT
ds@1330:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
ds@1330:  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
ds@1330:  * details.
dvander@1231:  *
ds@1330:  * You should have received a copy of the GNU General Public License along with
ds@1330:  * this program.  If not, see <http://www.gnu.org/licenses/>.
dvander@1231:  *
ds@1330:  * As a special exception, AlliedModders LLC gives you permission to link the
ds@1330:  * code of this program (as well as its derivative works) to "Half-Life 2," the
ds@1330:  * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
ds@1330:  * by the Valve Corporation.  You must obey the GNU General Public License in
ds@1330:  * all respects for all other code used.  Additionally, AlliedModders LLC grants
ds@1330:  * this exception to all derivative works.  AlliedModders LLC defines further
ds@1330:  * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
ds@1330:  * or <http://www.sourcemod.net/license.php>.
dvander@370:  *
dvander@370:  * Version: $Id$
dvander@370:  */
dvander@370: 
faluco@225: #include <math.h>
dvander@464: #include <string.h>
dvander@464: #include <stdlib.h>
ds@432: #include "sm_globals.h"
faluco@225: 
faluco@225: /****************************************
faluco@225: *                                       *
faluco@225: * FLOATING POINT NATIVE IMPLEMENTATIONS *
faluco@225: *                                       *
faluco@225: ****************************************/
faluco@225: 
faluco@225: 
faluco@225: static cell_t sm_float(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
faluco@225: 	float val = static_cast<float>(params[1]);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_FloatAbs(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@831: 	val = (val >= 0.0f) ? val : -val;
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_FloatAdd(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]) + sp_ctof(params[2]);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_FloatSub(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]) - sp_ctof(params[2]);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_FloatMul(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]) * sp_ctof(params[2]);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_FloatDiv(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]) / sp_ctof(params[2]);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_FloatCompare(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val1 = sp_ctof(params[1]);
dvander@233: 	float val2 = sp_ctof(params[2]);
faluco@225: 
faluco@225: 	if (val1 > val2)
faluco@225: 	{
faluco@225: 		return 1;
faluco@225: 	} else if (val1 < val2) {
faluco@225: 		return -1;
faluco@225: 	}
faluco@225: 
faluco@225: 	return 0;
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_Logarithm(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
dvander@233: 	float base = sp_ctof(params[2]);
faluco@225: 
faluco@831: 	if ((val <= 0.0f) || (base <= 0.0f))
faluco@225: 	{
ds@470: 		return pCtx->ThrowNativeError("Cannot evaluate the logarithm of zero or a negative number (val:%f base:%f)", val, base);
faluco@225: 	}
faluco@831: 	if (base == 10.0f)
faluco@225: 	{
faluco@225: 		val = log10(val);
faluco@225: 	} else {
faluco@225: 		val = log(val) / log(base);
faluco@225: 	}
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_Exponential(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@225: 
dvander@233: 	return sp_ftoc(exp(val));
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_Pow(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float base = sp_ctof(params[1]);
dvander@233: 	float exponent = sp_ctof(params[2]);
faluco@225: 
dvander@233: 	return sp_ftoc(pow(base, exponent));
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_SquareRoot(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@225: 
faluco@831: 	if (val < 0.0f)
faluco@225: 	{
ds@470: 		return pCtx->ThrowNativeError("Cannot evaluate the square root of a negative number (val:%f)", val);
faluco@225: 	}
faluco@225: 
dvander@233: 	return sp_ftoc(sqrt(val));
faluco@225: }
faluco@225: 
faluco@851: static cell_t sm_RoundToNearest(IPluginContext *pCtx, const cell_t *params)
faluco@831: {
faluco@831: 	float val = sp_ctof(params[1]);
faluco@831: 	val = (float)floor(val + 0.5f);
faluco@831: 
faluco@831: 	return static_cast<int>(val);
faluco@831: }
faluco@831: 
faluco@831: static cell_t sm_RoundToFloor(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@831: 	val = floor(val);
faluco@225: 
faluco@831: 	return static_cast<int>(val);
faluco@831: }
faluco@831: 
faluco@831: static cell_t sm_RoundToCeil(IPluginContext *pCtx, const cell_t *params)
faluco@831: {
faluco@831: 	float val = sp_ctof(params[1]);
faluco@831: 	val = ceil(val);
faluco@831: 
faluco@831: 	return static_cast<int>(val);
faluco@831: }
faluco@831: 
faluco@831: static cell_t sm_RoundToZero(IPluginContext *pCtx, const cell_t *params)
faluco@831: {
faluco@831: 	float val = sp_ctof(params[1]);
faluco@831: 	if (val >= 0.0f)
faluco@225: 	{
faluco@831: 		val = floor(val);
faluco@831: 	} else {
faluco@831: 		val = ceil(val);
faluco@225: 	}
faluco@225: 
faluco@242: 	return static_cast<int>(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_FloatFraction(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@225: 	val = val - floor(val);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_Sine(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@235: 	val = sin(val);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_Cosine(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@235: 	val = cos(val);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_Tangent(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@235: 	val = tan(val);
faluco@225: 
dvander@233: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_ArcSine(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@225: 	val = asin(val);
faluco@225: 
faluco@235: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_ArcCosine(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@225: 	val = acos(val);
faluco@225: 
faluco@235: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_ArcTangent(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val = sp_ctof(params[1]);
faluco@225: 	val = atan(val);
faluco@225: 
faluco@235: 	return sp_ftoc(val);
faluco@225: }
faluco@225: 
faluco@260: static cell_t sm_ArcTangent2(IPluginContext *pCtx, const cell_t *params)
faluco@225: {
dvander@233: 	float val1 = sp_ctof(params[1]);
dvander@233: 	float val2 = sp_ctof(params[2]);
faluco@225: 	val1 = atan2(val1, val2);
faluco@225: 
faluco@235: 	return sp_ftoc(val1);
faluco@225: }
faluco@260: 
faluco@836: static cell_t sm_FloatRound(IPluginContext *pCtx, const cell_t *params)
faluco@836: {
faluco@836: 	float val = sp_ctof(params[1]);
faluco@836: 
faluco@836: 	switch (params[2])
faluco@836: 	{
faluco@836: 	case 1:
faluco@836: 		{
faluco@836: 			val = floor(val);
faluco@836: 			break;
faluco@836: 		}
faluco@836: 	case 2:
faluco@836: 		{
faluco@836: 			val = ceil(val);
faluco@836: 			break;
faluco@836: 		}
faluco@836: 	case 3:
faluco@836: 		{
faluco@836: 			if (val >= 0.0f)
faluco@836: 			{
faluco@836: 				val = floor(val);
faluco@836: 			} else {
faluco@836: 				val = ceil(val);
faluco@836: 			}
faluco@836: 			break;
faluco@836: 		}
faluco@836: 	default:
faluco@836: 		{
faluco@836: 			val = (float)floor(val + 0.5f);
faluco@836: 			break;
faluco@836: 		}
faluco@836: 	}
faluco@836: 
faluco@836: 	return static_cast<int>(val);
faluco@836: }
faluco@836: 
faluco@260: REGISTER_NATIVES(floatnatives)
faluco@260: {
faluco@260: 	{"float",			sm_float},
faluco@260: 	{"FloatMul",		sm_FloatMul},
faluco@260: 	{"FloatDiv",		sm_FloatDiv},
faluco@260: 	{"FloatAdd",		sm_FloatAdd},
faluco@260: 	{"FloatSub",		sm_FloatSub},
faluco@260: 	{"FloatFraction",	sm_FloatFraction},
faluco@831: 	{"RoundToZero",		sm_RoundToZero},
faluco@831: 	{"RoundToCeil",		sm_RoundToCeil},
faluco@831: 	{"RoundToFloor",	sm_RoundToFloor},
faluco@851: 	{"RoundToNearest",	sm_RoundToNearest},
faluco@260: 	{"FloatCompare",	sm_FloatCompare},
faluco@260: 	{"SquareRoot",		sm_SquareRoot},
faluco@260: 	{"Pow",				sm_Pow},
faluco@260: 	{"Exponential",		sm_Exponential},
faluco@260: 	{"Logarithm",		sm_Logarithm},
faluco@260: 	{"Sine",			sm_Sine},
faluco@260: 	{"Cosine",			sm_Cosine},
faluco@260: 	{"Tangent",			sm_Tangent},
faluco@260: 	{"FloatAbs",		sm_FloatAbs},
faluco@260: 	{"ArcTangent",		sm_ArcTangent},
faluco@260: 	{"ArcCosine",		sm_ArcCosine},
faluco@260: 	{"ArcSine",			sm_ArcSine},
faluco@260: 	{"ArcTangent2",		sm_ArcTangent2},
faluco@836: 	{"FloatRound",		sm_FloatRound},			/* Backwards compat shim */
faluco@260: 	{NULL,				NULL}
dvander@351: };