| 1 |
125cee3d
|
Leszek Koltunski
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 2 |
cc62b34a
|
Leszek Koltunski
|
// Copyright 2017 Leszek Koltunski leszek@koltunski.pl //
|
| 3 |
125cee3d
|
Leszek Koltunski
|
// //
|
| 4 |
46b572b5
|
Leszek Koltunski
|
// This file is part of Distorted. //
|
| 5 |
125cee3d
|
Leszek Koltunski
|
// //
|
| 6 |
cc62b34a
|
Leszek Koltunski
|
// This library is free software; you can redistribute it and/or //
|
| 7 |
|
|
// modify it under the terms of the GNU Lesser General Public //
|
| 8 |
|
|
// License as published by the Free Software Foundation; either //
|
| 9 |
|
|
// version 2.1 of the License, or (at your option) any later version. //
|
| 10 |
125cee3d
|
Leszek Koltunski
|
// //
|
| 11 |
cc62b34a
|
Leszek Koltunski
|
// This library is distributed in the hope that it will be useful, //
|
| 12 |
125cee3d
|
Leszek Koltunski
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
| 13 |
cc62b34a
|
Leszek Koltunski
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU //
|
| 14 |
|
|
// Lesser General Public License for more details. //
|
| 15 |
125cee3d
|
Leszek Koltunski
|
// //
|
| 16 |
cc62b34a
|
Leszek Koltunski
|
// You should have received a copy of the GNU Lesser General Public //
|
| 17 |
|
|
// License along with this library; if not, write to the Free Software //
|
| 18 |
|
|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA //
|
| 19 |
125cee3d
|
Leszek Koltunski
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 20 |
|
|
|
| 21 |
|
|
package org.distorted.library.effect;
|
| 22 |
|
|
|
| 23 |
|
|
import org.distorted.library.type.Data3D;
|
| 24 |
|
|
import org.distorted.library.type.Data4D;
|
| 25 |
|
|
|
| 26 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 27 |
faa3ff56
|
Leszek Koltunski
|
/**
|
| 28 |
|
|
* Pull all points around the center of the Effect towards a line passing through the center
|
| 29 |
|
|
* (that's if degree>=1) or push them away from the line (degree<=1).
|
| 30 |
5e96393c
|
Leszek Koltunski
|
*
|
| 31 |
|
|
* Note: this is not a fully 3D effect - the pinching is always within the XY plane; z coordinates
|
| 32 |
|
|
* of all vertices remain unaffected. If someone wants a fully 3D Pinch effect, we'd probably need
|
| 33 |
|
|
* to write another VertexEffectPinch3D with 2 more arguments (latitude and longitude angles defining
|
| 34 |
|
|
* the plane the pinching works on).
|
| 35 |
faa3ff56
|
Leszek Koltunski
|
*/
|
| 36 |
125cee3d
|
Leszek Koltunski
|
public class VertexEffectPinch extends VertexEffect
|
| 37 |
|
|
{
|
| 38 |
f046b159
|
Leszek Koltunski
|
private static final EffectName NAME = EffectName.PINCH;
|
| 39 |
|
|
|
| 40 |
0e1d3d2e
|
Leszek Koltunski
|
private final Data3D mPinch;
|
| 41 |
|
|
private final Data3D mCenter;
|
| 42 |
|
|
private final Data4D mRegion;
|
| 43 |
0dd98279
|
Leszek Koltunski
|
|
| 44 |
125cee3d
|
Leszek Koltunski
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 45 |
6bb59aad
|
Leszek Koltunski
|
/**
|
| 46 |
faa3ff56
|
Leszek Koltunski
|
* Only for use by the library itself.
|
| 47 |
6bb59aad
|
Leszek Koltunski
|
*
|
| 48 |
faa3ff56
|
Leszek Koltunski
|
* @y.exclude
|
| 49 |
6bb59aad
|
Leszek Koltunski
|
*/
|
| 50 |
15aa7d94
|
Leszek Koltunski
|
public boolean compute(float[] uniforms, int index, long currentDuration, long step )
|
| 51 |
|
|
{
|
| 52 |
b24e4719
|
Leszek Koltunski
|
mCenter.get(uniforms,index+CENTER_OFFSET,currentDuration,step);
|
| 53 |
|
|
mRegion.get(uniforms,index+REGION_OFFSET,currentDuration,step);
|
| 54 |
f046b159
|
Leszek Koltunski
|
boolean ret = mPinch.get(uniforms,index+VALUES_OFFSET,currentDuration,step);
|
| 55 |
15aa7d94
|
Leszek Koltunski
|
|
| 56 |
f046b159
|
Leszek Koltunski
|
uniforms[index+VALUES_OFFSET+1] = (float)(Math.PI*uniforms[index+1]/180);
|
| 57 |
|
|
uniforms[index+VALUES_OFFSET+2] = (float)(Math.PI*uniforms[index+2]/180);
|
| 58 |
15aa7d94
|
Leszek Koltunski
|
|
| 59 |
|
|
return ret;
|
| 60 |
125cee3d
|
Leszek Koltunski
|
}
|
| 61 |
7cd24173
|
leszek
|
|
| 62 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 63 |
aee0b581
|
Leszek Koltunski
|
// Pull P=(v.x,v.y) along a vector from the center of region sphere to a point on it defined by
|
| 64 |
|
|
// the (latitude,longitude) pair of angles with P' = P + (1-h)*dist(line to P)
|
| 65 |
7cd24173
|
leszek
|
// when h>1 we are pushing points away from S: P' = P + (1/h-1)*dist(line to P)
|
| 66 |
aee0b581
|
Leszek Koltunski
|
// (where 'line' above passes through the center point and goes along the vector)
|
| 67 |
faa3ff56
|
Leszek Koltunski
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 68 |
f046b159
|
Leszek Koltunski
|
|
| 69 |
|
|
static String code()
|
| 70 |
7cd24173
|
leszek
|
{
|
| 71 |
f046b159
|
Leszek Koltunski
|
return
|
| 72 |
7cd24173
|
leszek
|
|
| 73 |
0f10a0b6
|
Leszek Koltunski
|
"vec3 ps = vUniforms[effect+1].yzw -v; \n"
|
| 74 |
569ea22c
|
Leszek Koltunski
|
+ "float h = vUniforms[effect].x; \n"
|
| 75 |
|
|
+ "float latitude = vUniforms[effect].y; \n"
|
| 76 |
|
|
+ "float longitude = vUniforms[effect].z; \n"
|
| 77 |
0f10a0b6
|
Leszek Koltunski
|
+ "float deg = degree(vUniforms[effect+2],ps); \n"
|
| 78 |
aee0b581
|
Leszek Koltunski
|
+ "float t = deg * (1.0-h)/max(1.0,h); \n"
|
| 79 |
|
|
+ "float sinLAT = sin(latitude); \n"
|
| 80 |
|
|
+ "float cosLAT = cos(latitude); \n"
|
| 81 |
|
|
+ "float sinLON = sin(longitude); \n"
|
| 82 |
|
|
+ "float cosLON = cos(longitude); \n"
|
| 83 |
|
|
+ "vec3 dir = vec3(sinLON*cosLAT,sinLAT,cosLON*cosLAT);\n"
|
| 84 |
569ea22c
|
Leszek Koltunski
|
+ "float dot_dir_ps = dot(dir,ps); \n"
|
| 85 |
|
|
+ "v += t*dot_dir_ps*dir; \n"
|
| 86 |
|
|
|
| 87 |
|
|
+ "const float A = 1.6; \n" // max amount of change in normal vector when pulling
|
| 88 |
|
|
+ "const float B = 10.0; \n" // when pushing
|
| 89 |
|
|
+ "vec3 n_ps = dot(ps,n)*ps; \n" // n_ps = (component of n that's parallel to ps) * |ps|^2 (=dot(ps,ps))
|
| 90 |
|
|
+ "float dot_ps = dot(ps,ps); \n"
|
| 91 |
|
|
+ "float sign_ps= sign(dot_ps); \n"
|
| 92 |
|
|
+ "n_ps = sign_ps*n_ps/(dot_ps-(sign_ps-1.0)); \n" // uff! now n_ps is the parallel to ps component of n, even if ps==0
|
| 93 |
|
|
+ "float move = deg*(h-1.0)/(h/B+1.0/A); \n" // move(0)=-A*deg, move(1)=0, move(inf)=B*deg
|
| 94 |
|
|
+ "n += move * abs(dot(n,dir)) * n_ps; \n"
|
| 95 |
f046b159
|
Leszek Koltunski
|
+ "n = normalize(n);";
|
| 96 |
|
|
}
|
| 97 |
|
|
|
| 98 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 99 |
|
|
// PUBLIC API
|
| 100 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 101 |
|
|
/**
|
| 102 |
|
|
* Have to call this before the shaders get compiled (i.e before DistortedLibrary.onCreate()) for the Effect to work.
|
| 103 |
|
|
*/
|
| 104 |
|
|
public static void enable()
|
| 105 |
|
|
{
|
| 106 |
|
|
addEffect( NAME, code() );
|
| 107 |
7cd24173
|
leszek
|
}
|
| 108 |
faa3ff56
|
Leszek Koltunski
|
|
| 109 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 110 |
|
|
/**
|
| 111 |
|
|
* Pull all points around the center of the Effect towards a line passing through the center
|
| 112 |
|
|
* (that's if degree>=1) or push them away from the line (degree<=1)
|
| 113 |
|
|
*
|
| 114 |
aee0b581
|
Leszek Koltunski
|
* @param pinch The current degree of the Effect + (latitude,longitude) pair of angles defining the
|
| 115 |
|
|
* * point towards which (and its antipode) the pinching power is strongest.
|
| 116 |
faa3ff56
|
Leszek Koltunski
|
* @param center 3-dimensional Data that, at any given time, returns the Center of the Effect.
|
| 117 |
|
|
* @param region Region that masks the Effect.
|
| 118 |
|
|
*/
|
| 119 |
aee0b581
|
Leszek Koltunski
|
public VertexEffectPinch(Data3D pinch, Data3D center, Data4D region)
|
| 120 |
faa3ff56
|
Leszek Koltunski
|
{
|
| 121 |
f046b159
|
Leszek Koltunski
|
super(NAME);
|
| 122 |
faa3ff56
|
Leszek Koltunski
|
mPinch = pinch;
|
| 123 |
|
|
mCenter = center;
|
| 124 |
dd89c7f4
|
Leszek Koltunski
|
mRegion = (region==null ? MAX_REGION : region);
|
| 125 |
faa3ff56
|
Leszek Koltunski
|
}
|
| 126 |
|
|
|
| 127 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 128 |
|
|
/**
|
| 129 |
|
|
* Pull all points around the center of the Effect towards a line passing through the center
|
| 130 |
|
|
* (that's if degree>=1) or push them away from the line (degree<=1)
|
| 131 |
|
|
*
|
| 132 |
aee0b581
|
Leszek Koltunski
|
* @param pinch The current degree of the Effect + (latitude,longitude) pair of angles defining the
|
| 133 |
|
|
* point towards which (and its antipode) the pinching power is strongest.
|
| 134 |
faa3ff56
|
Leszek Koltunski
|
* @param center 3-dimensional Data that, at any given time, returns the Center of the Effect.
|
| 135 |
|
|
*/
|
| 136 |
aee0b581
|
Leszek Koltunski
|
public VertexEffectPinch(Data3D pinch, Data3D center)
|
| 137 |
faa3ff56
|
Leszek Koltunski
|
{
|
| 138 |
f046b159
|
Leszek Koltunski
|
super(NAME);
|
| 139 |
faa3ff56
|
Leszek Koltunski
|
mPinch = pinch;
|
| 140 |
|
|
mCenter = center;
|
| 141 |
dd89c7f4
|
Leszek Koltunski
|
mRegion = MAX_REGION;
|
| 142 |
faa3ff56
|
Leszek Koltunski
|
}
|
| 143 |
125cee3d
|
Leszek Koltunski
|
}
|