mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-12-16 23:40:55 +00:00
155 lines
3.8 KiB
C++
155 lines
3.8 KiB
C++
/*
|
|
** gl_cycler.cpp
|
|
** Implements the cycler for dynamic lights and texture shaders.
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** Copyright 2003 Timothy Stump
|
|
** Copyright 2006 Christoph Oelckers
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
**
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**---------------------------------------------------------------------------
|
|
**
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include "gl/utility/gl_cycler.h"
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
void FCycler::Serialize(FArchive & arc)
|
|
{
|
|
arc << m_start << m_end << m_current
|
|
<< m_time << m_cycle << m_increment << m_shouldCycle
|
|
<< m_cycleType;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
FCycler::FCycler()
|
|
{
|
|
m_cycle = 0.f;
|
|
m_cycleType = CYCLE_Linear;
|
|
m_shouldCycle = false;
|
|
m_start = m_current = 0.f;
|
|
m_end = 0.f;
|
|
m_increment = true;
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
void FCycler::SetParams(float start, float end, float cycle)
|
|
{
|
|
m_cycle = cycle;
|
|
m_time = 0.f;
|
|
m_start = m_current = start;
|
|
m_end = end;
|
|
m_increment = true;
|
|
}
|
|
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
void FCycler::Update(float diff)
|
|
{
|
|
float mult, angle;
|
|
float step = m_end - m_start;
|
|
|
|
if (!m_shouldCycle)
|
|
{
|
|
return;
|
|
}
|
|
|
|
m_time += diff;
|
|
if (m_time >= m_cycle)
|
|
{
|
|
m_time = m_cycle;
|
|
}
|
|
|
|
mult = m_time / m_cycle;
|
|
|
|
switch (m_cycleType)
|
|
{
|
|
case CYCLE_Linear:
|
|
if (m_increment)
|
|
{
|
|
m_current = m_start + (step * mult);
|
|
}
|
|
else
|
|
{
|
|
m_current = m_end - (step * mult);
|
|
}
|
|
break;
|
|
case CYCLE_Sin:
|
|
angle = float(M_PI * 2.f * mult);
|
|
mult = sinf(angle);
|
|
mult = (mult + 1.f) / 2.f;
|
|
m_current = m_start + (step * mult);
|
|
break;
|
|
case CYCLE_Cos:
|
|
angle = float(M_PI * 2.f * mult);
|
|
mult = cosf(angle);
|
|
mult = (mult + 1.f) / 2.f;
|
|
m_current = m_start + (step * mult);
|
|
break;
|
|
case CYCLE_SawTooth:
|
|
m_current = m_start + (step * mult);
|
|
break;
|
|
case CYCLE_Square:
|
|
if (m_increment)
|
|
{
|
|
m_current = m_start;
|
|
}
|
|
else
|
|
{
|
|
m_current = m_end;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (m_time == m_cycle)
|
|
{
|
|
m_time = 0.f;
|
|
m_increment = !m_increment;
|
|
}
|
|
}
|
|
|
|
|