summaryrefslogtreecommitdiff
path: root/indra/newview/llsprite.cpp
blob: c3eb70f850c2a7622d5a2423b7e32908a2a850a9 (plain)
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
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
/** 
 * @file llsprite.cpp
 * @brief LLSprite class implementation
 *
 * $LicenseInfo:firstyear=2000&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

/* -*- c++ -*-
 *	Notes:
 *		PR - Should add a creator that can take a pointer rather than handle for streaming 
 *		object textures.
 *		PR - Need to add support for lit/non-lit conditions, set normals?
 */

#include "llviewerprecompiledheaders.h"

#include <llglheaders.h>

#include "llsprite.h"

#include "math.h"

#include "lldrawable.h"
#include "llface.h"
#include "llviewercamera.h"
#include "llviewertexturelist.h"

LLVector3 LLSprite::sCameraUp(0.0f,0.0f,1.0f);
LLVector3 LLSprite::sCameraRight(1.0f,0.0f,0.0f);
LLVector3 LLSprite::sCameraPosition(0.f, 0.f, 0.f);
LLVector3 LLSprite::sNormal(0.0f,0.0f,0.0f);

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

// A simple initialization
LLSprite::LLSprite(const LLUUID &image_uuid) :
	mImageID(image_uuid),
	mImagep(NULL),
	mPitch(0.f),
	mYaw(0.f),
	mPosition(0.0f, 0.0f, 0.0f),
	mFollow(TRUE),
	mUseCameraUp(TRUE),
	mColor(0.5f, 0.5f, 0.5f, 1.0f),
	mTexMode(GL_REPLACE)
{
	setSize(1.0f, 1.0f);
}

//////////////////////////////////////////////////////////////////////
LLSprite::~LLSprite()
{
}

void LLSprite::updateFace(LLFace &face)
{
	LLViewerCamera &camera = *LLViewerCamera::getInstance();

	// First, figure out how many vertices/indices we need.
	U32 num_vertices, num_indices;
	U32 vertex_count = 0;
	
	// Get the total number of vertices and indices
	if (mFollow)
	{
		num_vertices = 4;
		num_indices = 6;
	}
	else
	{
		num_vertices = 4;
		num_indices = 12;
	}

	face.setSize(num_vertices, num_indices);
	
	if (mFollow) 
	{
		sCameraUp = camera.getUpAxis();
		sCameraRight = -camera.getLeftAxis();
		sCameraPosition = camera.getOrigin();
		sNormal = -camera.getAtAxis();
		if (mUseCameraUp)
		{
			// these need to live here because the height/width may change between render calls
			mScaledUp = sCameraUp;
			mScaledRight = sCameraRight;

			mScaledUp *= mHeightDiv2;
			mScaledRight *= mWidthDiv2;

			mA = mPosition + mScaledRight + mScaledUp;
			mB = mPosition - mScaledRight + mScaledUp;
			mC = mPosition - mScaledRight - mScaledUp;
			mD = mPosition + mScaledRight - mScaledUp;
		}
		else
		{
			// The up vector is perpendicular to the camera vector...
			LLVector3 camera_vec = mPosition - sCameraPosition;
			mScaledRight = camera_vec % LLVector3(0.f, 0.f, 1.f);
			mScaledUp = -(camera_vec % mScaledRight);
			mScaledUp.normalize();
			mScaledRight.normalize();
			mScaledUp *= mHeightDiv2;
			mScaledRight *= mWidthDiv2;

			mA = mPosition + mScaledRight + mScaledUp;
			mB = mPosition - mScaledRight + mScaledUp;
			mC = mPosition - mScaledRight - mScaledUp;
			mD = mPosition + mScaledRight - mScaledUp;
		}
	}
	else
	{
		// this is equivalent to how it was done before. . . 
		// we need to establish a way to 
		// identify the orientation of a particular sprite rather than
		// just banging it in on the x,z plane if it's not following the camera.

		LLVector3 x_axis;
		LLVector3 y_axis;

		F32 dot = sNormal * LLVector3(0.f, 1.f, 0.f);
		if (dot == 1.f || dot == -1.f)
		{
			x_axis.setVec(1.f, 0.f, 0.f);
			y_axis.setVec(0.f, 1.f, 0.f);
		}
		else
		{
			x_axis = sNormal % LLVector3(0.f, -1.f, 0.f);
			x_axis.normalize();

			y_axis = sNormal % x_axis;
		}

		LLQuaternion yaw_rot(mYaw, sNormal);

		// rotate axes by specified yaw
		x_axis = x_axis * yaw_rot;
		y_axis = y_axis * yaw_rot;

		// rescale axes by width and height of sprite
		x_axis = x_axis * mWidthDiv2;
		y_axis = y_axis *  mHeightDiv2;

		mA = -x_axis + y_axis;
		mB = x_axis + y_axis;
		mC = x_axis - y_axis;
		mD = -x_axis - y_axis;

		mA += mPosition;
		mB += mPosition;
		mC += mPosition;
		mD += mPosition;
	}

	face.setFaceColor(mColor);

	LLStrider<LLVector3> verticesp;
	LLStrider<LLVector3> normalsp;
	LLStrider<LLVector2> tex_coordsp;
	LLStrider<U16> indicesp;
	U16 index_offset;

	// Setup face
	if (!face.getVertexBuffer())
	{	
		LLVertexBuffer* buff = new LLVertexBuffer(LLVertexBuffer::MAP_VERTEX | 
												LLVertexBuffer::MAP_TEXCOORD0,
												GL_STREAM_DRAW_ARB);
		buff->allocateBuffer(4, 12, TRUE);
		face.setGeomIndex(0);
		face.setIndicesIndex(0);
		face.setVertexBuffer(buff);
	}
		
	index_offset = face.getGeometry(verticesp,normalsp,tex_coordsp, indicesp);

	*tex_coordsp = LLVector2(0.f, 0.f);
	*verticesp = mC;
	tex_coordsp++;
	verticesp++;
	vertex_count++;

	*tex_coordsp = LLVector2(0.f, 1.f);
	*verticesp = mB;
	tex_coordsp++;
	verticesp++;
	vertex_count++;

	*tex_coordsp = LLVector2(1.f, 1.f);
	*verticesp = mA;
	tex_coordsp++;
	verticesp++;
	vertex_count++;

	*tex_coordsp = LLVector2(1.f, 0.0f);
	*verticesp = mD;
	tex_coordsp++;
	verticesp++;
	vertex_count++;

	// Generate indices, since they're easy.
	// Just a series of quads.
	*indicesp++ = index_offset;
	*indicesp++ = 2 + index_offset;
	*indicesp++ = 1 + index_offset;

	*indicesp++ = index_offset;
	*indicesp++ = 3 + index_offset;
	*indicesp++ = 2 + index_offset;

	if (!mFollow)
	{
		*indicesp++ = 0 + index_offset;
		*indicesp++ = 1 + index_offset;
		*indicesp++ = 2 + index_offset;
		*indicesp++ = 0 + index_offset;
		*indicesp++ = 2 + index_offset;
		*indicesp++ = 3 + index_offset;
	}

	face.getVertexBuffer()->flush();
	face.mCenterAgent = mPosition;
}

void LLSprite::setPosition(const LLVector3 &position) 
{
	mPosition = position; 
}


void LLSprite::setPitch(const F32 pitch) 
{
	mPitch = pitch; 
}


void LLSprite::setSize(const F32 width, const F32 height) 
{
	mWidth = width; 
	mHeight = height;
	mWidthDiv2 = width/2.0f;
	mHeightDiv2 = height/2.0f;
}

void LLSprite::setYaw(F32 yaw) 
{
	mYaw = yaw; 
}

void LLSprite::setFollow(const BOOL follow)
{
	mFollow = follow; 
}

void LLSprite::setUseCameraUp(const BOOL use_up)
{
	mUseCameraUp = use_up; 
}

void LLSprite::setTexMode(const LLGLenum mode) 
{
	mTexMode = mode; 
}

void LLSprite::setColor(const LLColor4 &color)
{
	mColor = color; 
}

void LLSprite::setColor(const F32 r, const F32 g, const F32 b, const F32 a)
{
	mColor.setVec(r, g, b, a);
}