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
|
//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $Workfile: $
// $Date: $
//
//-----------------------------------------------------------------------------
// $Log: $
//
// $NoKeywords: $
//=============================================================================//
#include "cbase.h"
#include "fx_discreetline.h"
#include "materialsystem/imaterial.h"
#include "materialsystem/imesh.h"
#include "view.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
/*
==================================================
CFXLine
==================================================
*/
CFXDiscreetLine::CFXDiscreetLine( const char *name, const Vector& start, const Vector& direction,
float velocity, float length, float clipLength, float scale, float life, const char *shader )
: CClientSideEffect( name )
{
assert( materials );
if ( materials == NULL )
return;
// Create a material...
m_pMaterial = materials->FindMaterial( shader, TEXTURE_GROUP_CLIENT_EFFECTS );
m_pMaterial->IncrementReferenceCount();
m_vecOrigin = start;
m_vecDirection = direction;
m_fVelocity = velocity;
m_fClipLength = clipLength;
m_fScale = scale;
m_fLife = life;
m_fStartTime = 0.0f;
m_fLength = length;
}
CFXDiscreetLine::~CFXDiscreetLine( void )
{
Destroy();
}
// Does extra calculations to make them more visible over distance
ConVar tracer_extra( "tracer_extra", "1" );
/*
==================================================
Draw
==================================================
*/
void CFXDiscreetLine::Draw( double frametime )
{
Vector lineDir, viewDir, cross;
Vector vecEnd, vecStart;
Vector tmp;
// Update the effect
Update( frametime );
// Calculate our distance along our path
float sDistance = m_fVelocity * m_fStartTime;
float eDistance = sDistance - m_fLength;
//Clip to start
sDistance = MAX( 0.0f, sDistance );
eDistance = MAX( 0.0f, eDistance );
if ( ( sDistance == 0.0f ) && ( eDistance == 0.0f ) )
return;
// Clip it
if ( m_fClipLength != 0.0f )
{
sDistance = MIN( sDistance, m_fClipLength );
eDistance = MIN( eDistance, m_fClipLength );
}
// Get our delta to calculate the tc offset
float dDistance = fabs( sDistance - eDistance );
float dTotal = ( m_fLength != 0.0f ) ? m_fLength : 0.01f;
float fOffset = ( dDistance / dTotal );
// Find our points along our path
VectorMA( m_vecOrigin, sDistance, m_vecDirection, vecEnd );
VectorMA( m_vecOrigin, eDistance, m_vecDirection, vecStart );
//Setup our info for drawing the line
VectorSubtract( vecEnd, vecStart, lineDir );
VectorSubtract( vecEnd, CurrentViewOrigin(), viewDir );
cross = lineDir.Cross( viewDir );
VectorNormalize( cross );
CMeshBuilder meshBuilder;
IMesh *pMesh;
CMatRenderContextPtr pRenderContext( materials );
// Better, more visible tracers
if ( tracer_extra.GetBool() )
{
float flScreenWidth = ScreenWidth();
float flHalfScreenWidth = flScreenWidth * 0.5f;
float zCoord = CurrentViewForward().Dot( vecStart - CurrentViewOrigin() );
float flScreenSpaceWidth = m_fScale * flHalfScreenWidth / zCoord;
float flAlpha;
float flScale;
if ( flScreenSpaceWidth < 0.5f )
{
flAlpha = RemapVal( flScreenSpaceWidth, 0.25f, 2.0f, 0.3f, 1.0f );
flAlpha = clamp( flAlpha, 0.25f, 1.0f );
flScale = 0.5f * zCoord / flHalfScreenWidth;
}
else
{
flAlpha = 1.0f;
flScale = m_fScale;
}
//Bind the material
pMesh = pRenderContext->GetDynamicMesh( true, NULL, NULL, m_pMaterial );
meshBuilder.Begin( pMesh, MATERIAL_QUADS, 2 );
float color = (int) 255.0f * flAlpha;
//FIXME: for now no coloration
VectorMA( vecStart, -flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 1.0f, 0.0f );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecStart, flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 0.0f, 0.0f );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecEnd, flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 0.0f, fOffset );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecEnd, -flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 1.0f, fOffset );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
flScale = flScale * 2.0f;
color = (int) 64.0f * flAlpha;
// Soft outline
VectorMA( vecStart, -flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 1.0f, 0.0f );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecStart, flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 0.0f, 0.0f );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecEnd, flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 0.0f, fOffset );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecEnd, -flScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 1.0f, fOffset );
meshBuilder.Color4ub( color, color, color, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
}
else
{
//Bind the material
pMesh = pRenderContext->GetDynamicMesh( true, NULL, NULL, m_pMaterial );
meshBuilder.Begin( pMesh, MATERIAL_QUADS, 1 );
//FIXME: for now no coloration
VectorMA( vecStart, -m_fScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 1.0f, 0.0f );
meshBuilder.Color4ub( 255, 255, 255, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecStart, m_fScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 0.0f, 0.0f );
meshBuilder.Color4ub( 255, 255, 255, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecEnd, m_fScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 0.0f, fOffset );
meshBuilder.Color4ub( 255, 255, 255, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
VectorMA( vecEnd, -m_fScale, cross, tmp );
meshBuilder.Position3fv( tmp.Base() );
meshBuilder.TexCoord2f( 0, 1.0f, fOffset );
meshBuilder.Color4ub( 255, 255, 255, 255 );
meshBuilder.Normal3fv( cross.Base() );
meshBuilder.AdvanceVertex();
}
meshBuilder.End();
pMesh->Draw();
}
/*
==================================================
IsActive
==================================================
*/
bool CFXDiscreetLine::IsActive( void )
{
return ( m_fLife > 0.0 ) ? true : false;
}
/*
==================================================
Destroy
==================================================
*/
void CFXDiscreetLine::Destroy( void )
{
//Release the material
if ( m_pMaterial != NULL )
{
m_pMaterial->DecrementReferenceCount();
m_pMaterial = NULL;
}
}
/*
==================================================
Update
==================================================
*/
void CFXDiscreetLine::Update( double frametime )
{
m_fStartTime += frametime;
m_fLife -= frametime;
//Move our end points
//VectorMA( m_vecStart, frametime, m_vecStartVelocity, m_vecStart );
//VectorMA( m_vecEnd, frametime, m_vecStartVelocity, m_vecEnd );
}
|