1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "CSkyBoxSceneNode.h"
#include "IVideoDriver.h"
#include "ISceneManager.h"
#include "ICameraSceneNode.h"
#include "S3DVertex.h"
#include "os.h"
namespace irr
{
namespace scene
{
//! constructor
CSkyBoxSceneNode::CSkyBoxSceneNode(video::ITexture* top, video::ITexture* bottom, video::ITexture* left,
video::ITexture* right, video::ITexture* front, video::ITexture* back, ISceneNode* parent, ISceneManager* mgr, s32 id)
: ISceneNode(parent, mgr, id)
{
#ifdef _DEBUG
setDebugName("CSkyBoxSceneNode");
#endif
setAutomaticCulling(scene::EAC_OFF);
Box.MaxEdge.set(0,0,0);
Box.MinEdge.set(0,0,0);
// create indices
Indices[0] = 0;
Indices[1] = 1;
Indices[2] = 2;
Indices[3] = 3;
// create material
video::SMaterial mat;
mat.Lighting = false;
mat.ZBuffer = video::ECFN_NEVER;
mat.ZWriteEnable = false;
mat.AntiAliasing=0;
mat.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
mat.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
/* Hey, I am no artist, but look at that
cool ASCII art I made! ;)
-111 111
/6--------/5 y
/ | / | ^ z
/ | 11-1 | | /
-11-1 3---------2 | |/
| 7- - -| -4 1-11 *---->x
| -1-11 | / 3-------|2
|/ | / | //|
0---------1/ | // |
-1-1-1 1-1-1 |// |
0--------1
*/
video::ITexture* tex = front;
if (!tex) tex = left;
if (!tex) tex = back;
if (!tex) tex = right;
if (!tex) tex = top;
if (!tex) tex = bottom;
const f32 onepixel = tex?(1.0f / (tex->getSize().Width * 1.5f)) : 0.0f;
const f32 t = 1.0f - onepixel;
const f32 o = 0.0f + onepixel;
// create front side
Material[0] = mat;
Material[0].setTexture(0, front);
Vertices[0] = video::S3DVertex(-1,-1,-1, 0,0,1, video::SColor(255,255,255,255), t, t);
Vertices[1] = video::S3DVertex( 1,-1,-1, 0,0,1, video::SColor(255,255,255,255), o, t);
Vertices[2] = video::S3DVertex( 1, 1,-1, 0,0,1, video::SColor(255,255,255,255), o, o);
Vertices[3] = video::S3DVertex(-1, 1,-1, 0,0,1, video::SColor(255,255,255,255), t, o);
// create left side
Material[1] = mat;
Material[1].setTexture(0, left);
Vertices[4] = video::S3DVertex( 1,-1,-1, -1,0,0, video::SColor(255,255,255,255), t, t);
Vertices[5] = video::S3DVertex( 1,-1, 1, -1,0,0, video::SColor(255,255,255,255), o, t);
Vertices[6] = video::S3DVertex( 1, 1, 1, -1,0,0, video::SColor(255,255,255,255), o, o);
Vertices[7] = video::S3DVertex( 1, 1,-1, -1,0,0, video::SColor(255,255,255,255), t, o);
// create back side
Material[2] = mat;
Material[2].setTexture(0, back);
Vertices[8] = video::S3DVertex( 1,-1, 1, 0,0,-1, video::SColor(255,255,255,255), t, t);
Vertices[9] = video::S3DVertex(-1,-1, 1, 0,0,-1, video::SColor(255,255,255,255), o, t);
Vertices[10] = video::S3DVertex(-1, 1, 1, 0,0,-1, video::SColor(255,255,255,255), o, o);
Vertices[11] = video::S3DVertex( 1, 1, 1, 0,0,-1, video::SColor(255,255,255,255), t, o);
// create right side
Material[3] = mat;
Material[3].setTexture(0, right);
Vertices[12] = video::S3DVertex(-1,-1, 1, 1,0,0, video::SColor(255,255,255,255), t, t);
Vertices[13] = video::S3DVertex(-1,-1,-1, 1,0,0, video::SColor(255,255,255,255), o, t);
Vertices[14] = video::S3DVertex(-1, 1,-1, 1,0,0, video::SColor(255,255,255,255), o, o);
Vertices[15] = video::S3DVertex(-1, 1, 1, 1,0,0, video::SColor(255,255,255,255), t, o);
// create top side
Material[4] = mat;
Material[4].setTexture(0, top);
Vertices[16] = video::S3DVertex( 1, 1,-1, 0,-1,0, video::SColor(255,255,255,255), t, t);
Vertices[17] = video::S3DVertex( 1, 1, 1, 0,-1,0, video::SColor(255,255,255,255), o, t);
Vertices[18] = video::S3DVertex(-1, 1, 1, 0,-1,0, video::SColor(255,255,255,255), o, o);
Vertices[19] = video::S3DVertex(-1, 1,-1, 0,-1,0, video::SColor(255,255,255,255), t, o);
// create bottom side
Material[5] = mat;
Material[5].setTexture(0, bottom);
Vertices[20] = video::S3DVertex( 1,-1, 1, 0,1,0, video::SColor(255,255,255,255), o, o);
Vertices[21] = video::S3DVertex( 1,-1,-1, 0,1,0, video::SColor(255,255,255,255), t, o);
Vertices[22] = video::S3DVertex(-1,-1,-1, 0,1,0, video::SColor(255,255,255,255), t, t);
Vertices[23] = video::S3DVertex(-1,-1, 1, 0,1,0, video::SColor(255,255,255,255), o, t);
}
//! renders the node.
void CSkyBoxSceneNode::render()
{
video::IVideoDriver* driver = SceneManager->getVideoDriver();
scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
if (!camera || !driver)
return;
if ( !camera->isOrthogonal() )
{
// draw perspective skybox
core::matrix4 translate(AbsoluteTransformation);
translate.setTranslation(camera->getAbsolutePosition());
// Draw the sky box between the near and far clip plane
const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
core::matrix4 scale;
scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
driver->setTransform(video::ETS_WORLD, translate * scale);
for (s32 i=0; i<6; ++i)
{
driver->setMaterial(Material[i]);
driver->drawIndexedTriangleFan(&Vertices[i*4], 4, Indices, 2);
}
}
else
{
// draw orthogonal skybox,
// simply choose one texture and draw it as 2d picture.
// there could be better ways to do this, but currently I think this is ok.
core::vector3df lookVect = camera->getTarget() - camera->getAbsolutePosition();
lookVect.normalize();
core::vector3df absVect( core::abs_(lookVect.X),
core::abs_(lookVect.Y),
core::abs_(lookVect.Z));
int idx = 0;
if ( absVect.X >= absVect.Y && absVect.X >= absVect.Z )
{
// x direction
idx = lookVect.X > 0 ? 0 : 2;
}
else
if ( absVect.Y >= absVect.X && absVect.Y >= absVect.Z )
{
// y direction
idx = lookVect.Y > 0 ? 4 : 5;
}
else
if ( absVect.Z >= absVect.X && absVect.Z >= absVect.Y )
{
// z direction
idx = lookVect.Z > 0 ? 1 : 3;
}
video::ITexture* tex = Material[idx].getTexture(0);
if ( tex )
{
core::rect<s32> rctDest(core::position2d<s32>(-1,0),
core::dimension2di(driver->getCurrentRenderTargetSize()));
core::rect<s32> rctSrc(core::position2d<s32>(0,0),
core::dimension2di(tex->getSize()));
driver->draw2DImage(tex, rctDest, rctSrc);
}
}
}
//! returns the axis aligned bounding box of this node
const core::aabbox3d<f32>& CSkyBoxSceneNode::getBoundingBox() const
{
return Box;
}
void CSkyBoxSceneNode::OnRegisterSceneNode()
{
if (IsVisible)
SceneManager->registerNodeForRendering(this, ESNRP_SKY_BOX);
ISceneNode::OnRegisterSceneNode();
}
//! returns the material based on the zero based index i. To get the amount
//! of materials used by this scene node, use getMaterialCount().
//! This function is needed for inserting the node into the scene hirachy on a
//! optimal position for minimizing renderstate changes, but can also be used
//! to directly modify the material of a scene node.
video::SMaterial& CSkyBoxSceneNode::getMaterial(u32 i)
{
return Material[i];
}
//! returns amount of materials used by this scene node.
u32 CSkyBoxSceneNode::getMaterialCount() const
{
return 6;
}
//! Creates a clone of this scene node and its children.
ISceneNode* CSkyBoxSceneNode::clone(ISceneNode* newParent, ISceneManager* newManager)
{
if (!newParent) newParent = Parent;
if (!newManager) newManager = SceneManager;
CSkyBoxSceneNode* nb = new CSkyBoxSceneNode(0,0,0,0,0,0, newParent,
newManager, ID);
nb->cloneMembers(this, newManager);
for (u32 i=0; i<6; ++i)
nb->Material[i] = Material[i];
if ( newParent )
nb->drop();
return nb;
}
} // end namespace scene
} // end namespace irr
|
