|
1
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
2
|
// Copyright 2016 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;
|
|
21
|
|
|
22
|
import android.opengl.GLES30;
|
|
23
|
|
|
24
|
import java.nio.FloatBuffer;
|
|
25
|
|
|
26
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
27
|
/**
|
|
28
|
* Abstract class which represents a Mesh, ie 3 arrays of Vertex attributes: 1) positions
|
|
29
|
* 2) normals 3) texture coordinates.
|
|
30
|
* <p>
|
|
31
|
* If you want to render to a particular shape, extend from here, construct the attrib FloatBuffer
|
|
32
|
* and provide correct numVertices.
|
|
33
|
*/
|
|
34
|
public abstract class MeshObject extends DistortedObject
|
|
35
|
{
|
|
36
|
private static final int BYTES_PER_FLOAT = 4;
|
|
37
|
|
|
38
|
static final int POSITION_DATA_SIZE= 3;
|
|
39
|
static final int NORMAL_DATA_SIZE = 3;
|
|
40
|
static final int TEX_DATA_SIZE = 2;
|
|
41
|
|
|
42
|
static final int OFFSET0 = 0;
|
|
43
|
static final int OFFSET1 = (POSITION_DATA_SIZE )*BYTES_PER_FLOAT;
|
|
44
|
static final int OFFSET2 = (POSITION_DATA_SIZE+NORMAL_DATA_SIZE )*BYTES_PER_FLOAT;
|
|
45
|
static final int VERTSIZE= (POSITION_DATA_SIZE+NORMAL_DATA_SIZE+TEX_DATA_SIZE)*BYTES_PER_FLOAT;
|
|
46
|
|
|
47
|
int numVertices;
|
|
48
|
FloatBuffer mVertAttribs; // packed: PosX,PosY,PosZ, NorX, NorY,NorZ, TexS, TexT
|
|
49
|
int[] mAttVBO = new int[1]; // server-side packed vertex attributes
|
|
50
|
|
|
51
|
final float zFactor; // strange workaround for the fact that we need to somehow store the 'depth'
|
|
52
|
// of the Mesh. Used in DistortedEffects. See DistortedTexture.getDepth().
|
|
53
|
|
|
54
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
55
|
|
|
56
|
MeshObject(float factor)
|
|
57
|
{
|
|
58
|
super(DistortedObject.NOT_CREATED_YET,DistortedObject.TYPE_USER);
|
|
59
|
|
|
60
|
zFactor = factor;
|
|
61
|
recreate();
|
|
62
|
}
|
|
63
|
|
|
64
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
65
|
// must be called from a thread holding OpenGL Context
|
|
66
|
//
|
|
67
|
// Do NOT release mVertAttribs etc as we will need them when we need to re-create the buffers after
|
|
68
|
// a loss of OpenGL context!
|
|
69
|
|
|
70
|
void create()
|
|
71
|
{
|
|
72
|
if( mAttVBO[0]<0 )
|
|
73
|
{
|
|
74
|
GLES30.glGenBuffers(1, mAttVBO, 0);
|
|
75
|
GLES30.glBindBuffer(GLES30.GL_ARRAY_BUFFER, mAttVBO[0]);
|
|
76
|
GLES30.glBufferData(GLES30.GL_ARRAY_BUFFER, numVertices*VERTSIZE, mVertAttribs, GLES30.GL_STATIC_READ);
|
|
77
|
GLES30.glBindBuffer(GLES30.GL_ARRAY_BUFFER, 0);
|
|
78
|
}
|
|
79
|
}
|
|
80
|
|
|
81
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
82
|
// must be called from a thread holding OpenGL Context
|
|
83
|
|
|
84
|
void delete()
|
|
85
|
{
|
|
86
|
if( mAttVBO[0]>=0 )
|
|
87
|
{
|
|
88
|
GLES30.glDeleteBuffers(1, mAttVBO, 0);
|
|
89
|
mAttVBO[0] = -1;
|
|
90
|
}
|
|
91
|
}
|
|
92
|
|
|
93
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
94
|
|
|
95
|
void recreate()
|
|
96
|
{
|
|
97
|
mAttVBO[0] = -1;
|
|
98
|
}
|
|
99
|
|
|
100
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
101
|
// debugging only
|
|
102
|
|
|
103
|
String printDetails()
|
|
104
|
{
|
|
105
|
return getClass().getSimpleName()+" vertices:"+ numVertices;
|
|
106
|
}
|
|
107
|
|
|
108
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
109
|
/**
|
|
110
|
* Get the minimal set of Vertices which have the same convex hull as the whole set.
|
|
111
|
* <p>
|
|
112
|
* In case of Flat Meshes, the set is obviously just the 4 corners. In case of the Cubes Mesh,
|
|
113
|
* it is a subset of the set of each rightmost- and leftmost- corners in each row.
|
|
114
|
* <p>
|
|
115
|
* This is used to be able to quickly compute, in window coordinates, the Mesh'es bounding rectangle.
|
|
116
|
*/
|
|
117
|
abstract float[] getBoundingVertices();
|
|
118
|
}
|
|
119
|
|