| 1 |
9f34a0f6
|
Leszek Koltunski
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 2 |
|
|
// Copyright 2020 Leszek Koltunski //
|
| 3 |
|
|
// //
|
| 4 |
|
|
// This file is part of Distorted. //
|
| 5 |
|
|
// //
|
| 6 |
|
|
// Distorted is free software: you can redistribute it and/or modify //
|
| 7 |
|
|
// it under the terms of the GNU General Public License as published by //
|
| 8 |
|
|
// the Free Software Foundation, either version 2 of the License, or //
|
| 9 |
|
|
// (at your option) any later version. //
|
| 10 |
|
|
// //
|
| 11 |
|
|
// Distorted is distributed in the hope that it will be useful, //
|
| 12 |
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
| 13 |
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
| 14 |
|
|
// GNU General Public License for more details. //
|
| 15 |
|
|
// //
|
| 16 |
|
|
// You should have received a copy of the GNU General Public License //
|
| 17 |
|
|
// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
|
| 18 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 19 |
|
|
|
| 20 |
|
|
package org.distorted.library.effect;
|
| 21 |
|
|
|
| 22 |
|
|
import org.distorted.library.type.Data1D;
|
| 23 |
|
|
import org.distorted.library.type.Data3D;
|
| 24 |
|
|
|
| 25 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 26 |
|
|
|
| 27 |
|
|
/**
|
| 28 |
943b2e18
|
Leszek Koltunski
|
* Rotate the Mesh along a given axis by a given angle.
|
| 29 |
9f34a0f6
|
Leszek Koltunski
|
*/
|
| 30 |
|
|
public class VertexEffectRotate extends VertexEffect
|
| 31 |
|
|
{
|
| 32 |
f046b159
|
Leszek Koltunski
|
private static final EffectName NAME = EffectName.VERTEX_ROTATE;
|
| 33 |
|
|
|
| 34 |
9f34a0f6
|
Leszek Koltunski
|
private Data1D mAngle;
|
| 35 |
|
|
private Data3D mAxis, mCenter;
|
| 36 |
|
|
|
| 37 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 38 |
|
|
/**
|
| 39 |
|
|
* Only for use by the library itself.
|
| 40 |
|
|
*
|
| 41 |
|
|
* @y.exclude
|
| 42 |
|
|
*/
|
| 43 |
|
|
public boolean compute(float[] uniforms, int index, long currentDuration, long step )
|
| 44 |
|
|
{
|
| 45 |
|
|
mCenter.get(uniforms,index+CENTER_OFFSET,currentDuration,step);
|
| 46 |
f046b159
|
Leszek Koltunski
|
mAxis.get(uniforms,index+VALUES_OFFSET+1,currentDuration,step);
|
| 47 |
9f34a0f6
|
Leszek Koltunski
|
|
| 48 |
|
|
float len = uniforms[index+1]*uniforms[index+1] + uniforms[index+2]*uniforms[index+2] + uniforms[index+3]*uniforms[index+3];
|
| 49 |
|
|
len = (float)Math.sqrt(len);
|
| 50 |
|
|
|
| 51 |
|
|
if( len!=0 )
|
| 52 |
|
|
{
|
| 53 |
f046b159
|
Leszek Koltunski
|
uniforms[index+VALUES_OFFSET+1] /= len;
|
| 54 |
|
|
uniforms[index+VALUES_OFFSET+2] /= len;
|
| 55 |
|
|
uniforms[index+VALUES_OFFSET+3] /= len;
|
| 56 |
9f34a0f6
|
Leszek Koltunski
|
}
|
| 57 |
|
|
|
| 58 |
f046b159
|
Leszek Koltunski
|
return mAngle.get(uniforms,index+VALUES_OFFSET,currentDuration,step);
|
| 59 |
9f34a0f6
|
Leszek Koltunski
|
}
|
| 60 |
|
|
|
| 61 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 62 |
f046b159
|
Leszek Koltunski
|
|
| 63 |
|
|
static String code()
|
| 64 |
9f34a0f6
|
Leszek Koltunski
|
{
|
| 65 |
f046b159
|
Leszek Koltunski
|
return
|
| 66 |
|
|
|
| 67 |
|
|
"float angle = vUniforms[effect].x*3.1415/360.0;\n"
|
| 68 |
|
|
+ "vec3 center = vUniforms[effect+1].yzw; \n"
|
| 69 |
c61b08e4
|
Leszek Koltunski
|
+ "float sinHalf =-sin(angle); \n"
|
| 70 |
f046b159
|
Leszek Koltunski
|
+ "float cosHalf = cos(angle); \n"
|
| 71 |
9f34a0f6
|
Leszek Koltunski
|
|
| 72 |
f046b159
|
Leszek Koltunski
|
+ "float qx = vUniforms[effect].y * sinHalf; \n"
|
| 73 |
|
|
+ "float qy = vUniforms[effect].z * sinHalf; \n"
|
| 74 |
|
|
+ "float qz = vUniforms[effect].w * sinHalf; \n"
|
| 75 |
|
|
+ "float qw = cosHalf; \n"
|
| 76 |
9f34a0f6
|
Leszek Koltunski
|
|
| 77 |
f046b159
|
Leszek Koltunski
|
+ "v -= center; \n"
|
| 78 |
9f34a0f6
|
Leszek Koltunski
|
|
| 79 |
f046b159
|
Leszek Koltunski
|
+ "float tx = qx - v.z*qy + v.y*qz + v.x*qw; \n"
|
| 80 |
|
|
+ "float ty = qy + v.z*qx + v.y*qw - v.x*qz; \n"
|
| 81 |
|
|
+ "float tz = qz + v.z*qw - v.y*qx + v.x*qy; \n"
|
| 82 |
|
|
+ "float tw = qw - v.z*qz - v.y*qy - v.x*qx; \n"
|
| 83 |
9f34a0f6
|
Leszek Koltunski
|
|
| 84 |
f046b159
|
Leszek Koltunski
|
+ "v.x = qw*tx + qz*ty - qy*tz - qx*tw; \n"
|
| 85 |
|
|
+ "v.y = qw*ty - qz*tx - qy*tw + qx*tz; \n"
|
| 86 |
|
|
+ "v.z = qw*tz - qz*tw + qy*tx - qx*ty; \n"
|
| 87 |
9f34a0f6
|
Leszek Koltunski
|
|
| 88 |
f046b159
|
Leszek Koltunski
|
+ "v += center; \n"
|
| 89 |
9f34a0f6
|
Leszek Koltunski
|
|
| 90 |
f046b159
|
Leszek Koltunski
|
+ "float nx = - n.z*qy + n.y*qz + n.x*qw; \n"
|
| 91 |
|
|
+ "float ny = + n.z*qx + n.y*qw - n.x*qz; \n"
|
| 92 |
|
|
+ "float nz = + n.z*qw - n.y*qx + n.x*qy; \n"
|
| 93 |
|
|
+ "float nw = - n.z*qz - n.y*qy - n.x*qx; \n"
|
| 94 |
9f34a0f6
|
Leszek Koltunski
|
|
| 95 |
f046b159
|
Leszek Koltunski
|
+ "n.x = qw*nx + qz*ny - qy*nz - qx*nw; \n"
|
| 96 |
|
|
+ "n.y = qw*ny - qz*nx - qy*nw + qx*nz; \n"
|
| 97 |
457bd08e
|
Leszek Koltunski
|
+ "n.z = qw*nz - qz*nw + qy*nx - qx*ny; \n"
|
| 98 |
|
|
|
| 99 |
|
|
+ "n = normalize(n);";
|
| 100 |
f046b159
|
Leszek Koltunski
|
}
|
| 101 |
9f34a0f6
|
Leszek Koltunski
|
|
| 102 |
f046b159
|
Leszek Koltunski
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 103 |
|
|
// PUBLIC API
|
| 104 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 105 |
|
|
/**
|
| 106 |
|
|
* Have to call this before the shaders get compiled (i.e before DistortedLibrary.onCreate()) for the Effect to work.
|
| 107 |
|
|
*/
|
| 108 |
|
|
public static void enable()
|
| 109 |
|
|
{
|
| 110 |
|
|
addEffect( NAME, code() );
|
| 111 |
9f34a0f6
|
Leszek Koltunski
|
}
|
| 112 |
|
|
|
| 113 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 114 |
|
|
/**
|
| 115 |
|
|
* Rotate the Mesh by 'angle' degrees around the center, along an axis.
|
| 116 |
|
|
*
|
| 117 |
|
|
* @param angle Angle that we want to rotate the Object to. Unit: degrees
|
| 118 |
|
|
* @param axis Axis of rotation
|
| 119 |
|
|
* @param center Coordinates of the Point we are rotating around.
|
| 120 |
|
|
*/
|
| 121 |
|
|
public VertexEffectRotate(Data1D angle, Data3D axis, Data3D center)
|
| 122 |
|
|
{
|
| 123 |
f046b159
|
Leszek Koltunski
|
super(NAME);
|
| 124 |
9f34a0f6
|
Leszek Koltunski
|
mAngle = angle;
|
| 125 |
|
|
mAxis = axis;
|
| 126 |
|
|
mCenter = center;
|
| 127 |
|
|
}
|
| 128 |
|
|
}
|