Oolite 1.91.0.7644-241112-7f5034b
Loading...
Searching...
No Matches
OOLaserShotEntity.m
Go to the documentation of this file.
1/*
2
3OOLaserShotEntity.m
4
5
6Oolite
7Copyright (C) 2004-2013 Giles C Williams and contributors
8
9This program is free software; you can redistribute it and/or
10modify it under the terms of the GNU General Public License
11as published by the Free Software Foundation; either version 2
12of the License, or (at your option) any later version.
13
14This program is distributed in the hope that it will be useful,
15but WITHOUT ANY WARRANTY; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License
20along with this program; if not, write to the Free Software
21Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
22MA 02110-1301, USA.
23
24*/
25
26#import "OOLaserShotEntity.h"
27#import "Universe.h"
28#import "ShipEntity.h"
29#import "OOMacroOpenGL.h"
30
31#import "OOTexture.h"
33
34#import "MyOpenGLView.h"
35
36
37#define kLaserDuration (0.09) // seconds
38
39// Default colour
40#define kLaserRed (1.0f)
41#define kLaserGreen (0.0f)
42#define kLaserBlue (0.0f)
43
44// Brightness - set to 1.0 for legacy laser appearance
45#define kLaserBrightness (5.0f)
46
47// Constant alpha
48#define kLaserAlpha (0.45f / kLaserBrightness)
49
50#define kLaserCoreWidth (0.4f)
51#define kLaserFlareWidth (1.8f)
52#define kLaserHalfWidth (3.6f)
53
56
57@implementation OOLaserShotEntity
58
59- (instancetype) initLaserFromShip:(ShipEntity *)srcEntity direction:(OOWeaponFacing)direction offset:(Vector)offset
60{
61 if (!(self = [super init])) return nil;
62
63 ShipEntity *ship = [srcEntity rootShipEntity];
64 Vector middle = OOBoundingBoxCenter([srcEntity boundingBox]);
65
66 NSCParameterAssert([srcEntity isShip] && [ship isShip]);
67
68 [self setStatus:STATUS_EFFECT];
69
70 if (ship == srcEntity)
71 {
72 // main laser offset
73 [self setPosition:HPvector_add([ship position], vectorToHPVector(OOVectorMultiplyMatrix(offset, [ship drawRotationMatrix])))];
74 }
75 else
76 {
77 // subentity laser
78 [self setPosition:[srcEntity absolutePositionForSubentityOffset:vectorToHPVector(middle)]];
79 }
80
81 Quaternion q = kIdentityQuaternion;
82 Vector q_up = vector_up_from_quaternion(q);
83 Quaternion q0 = [ship normalOrientation];
84 velocity = vector_multiply_scalar(vector_forward_from_quaternion(q0), [ship flightSpeed]);
85
86 switch (direction)
87 {
90 break;
91
94 break;
95
98 break;
99
101 quaternion_rotate_about_axis(&q, q_up, -M_PI/2.0);
102 break;
103 }
104
105 [self setOrientation:quaternion_multiply(q,q0)];
106 [self setOwner:ship];
107 [self setRange:[srcEntity weaponRange]];
109
110 _color[0] = kLaserRed/3.0;
111 _color[1] = kLaserGreen/3.0;
112 _color[2] = kLaserBlue/3.0;
113 _color[3] = kLaserAlpha;
114
115 _offset = (ship == srcEntity) ? offset : middle;
116 _relOrientation = q;
117
118 return self;
119}
120
121
122+ (instancetype) laserFromShip:(ShipEntity *)ship direction:(OOWeaponFacing)direction offset:(Vector)offset
123{
124 return [[[self alloc] initLaserFromShip:ship direction:direction offset:offset] autorelease];
125}
126
127
128- (void) dealloc
129{
130 [self setColor:nil];
131
132 [super dealloc];
133}
134
135
136- (NSString *) descriptionComponents
137{
138 return [NSString stringWithFormat:@"ttl: %.3fs - %@ orientation %@", _lifetime, [super descriptionComponents], QuaternionDescription([self orientation])];
139}
140
141
142- (void) setColor:(OOColor *)color
143{
144 _color[0] = kLaserBrightness * [color redComponent]/3.0;
145 _color[1] = kLaserBrightness * [color greenComponent]/3.0;
146 _color[2] = kLaserBrightness * [color blueComponent]/3.0;
147 // Ignore alpha; _color[3] is constant.
148}
149
150
151- (void) setRange:(GLfloat)range
152{
153 _range = range;
154 [self setCollisionRadius:range];
155}
156
157
158- (void) update:(OOTimeDelta)delta_t
159{
160 [super update:delta_t];
161 _lifetime -= delta_t;
162 ShipEntity *ship = [self owner];
163
164 if ([ship isPlayer])
165 {
166 /*
167 Reposition this shot accurately. This overrides integration over
168 velocity in -[Entity update:], which is considered sufficient for
169 NPC ships.
170 */
171 [self setPosition:HPvector_add([ship position], vectorToHPVector(OOVectorMultiplyMatrix(_offset, [ship drawRotationMatrix])))];
172 [self setOrientation:quaternion_multiply(_relOrientation, [ship normalOrientation])];
173 }
174
175 if (_lifetime < 0)
176 {
177 [UNIVERSE removeEntity:self];
178 }
179}
180
181
182static const GLfloat kLaserVertices[] =
183{
184 1.0f, 0.0f, 0.0f,
185 1.0f, 0.0f, 1.0f,
186 -1.0f, 0.0f, 1.0f,
187 -1.0f, 0.0f, 0.0f,
188
189 0.0f, 1.0f, 0.0f,
190 0.0f, 1.0f, 1.0f,
191 0.0f, -1.0f, 1.0f,
192 0.0f, -1.0f, 0.0f,
193};
194
195
196- (void) drawImmediate:(bool)immediate translucent:(bool)translucent
197{
198 if (!translucent || [UNIVERSE breakPatternHide]) return;
199
202
203
204 /* FIXME: spread damage across the lifetime of the shot,
205 hurting whatever is hit in a given frame.
206 -- Ahruman 2011-01-31
207 */
208 OOGL(glEnableClientState(GL_TEXTURE_COORD_ARRAY));
209 OOGL(glEnable(GL_TEXTURE_2D));
211
213 [[self texture1] apply];
214 GLfloat s = sinf([UNIVERSE getTime]);
215 GLfloat phase = s*(_range/200.0f);
216 GLfloat phase2 = (1.0f+s)*(_range/200.0f);
217 GLfloat phase3 = -s*(_range/500.0f);
218 GLfloat phase4 = -(1.0f+s)*(_range/500.0f);
219
220 GLfloat laserTexCoords[] =
221 {
222 0.0f, phase, 0.0f, phase2, 1.0f, phase2, 1.0f, phase,
223
224 0.0f, phase, 0.0f, phase2, 1.0f, phase2, 1.0f, phase
225 };
226 GLfloat laserTexCoords2[] =
227 {
228 0.0f, phase3, 0.0f, phase4, 1.0f, phase4, 1.0f, phase3,
229
230 0.0f, phase3, 0.0f, phase4, 1.0f, phase4, 1.0f, phase3
231 };
232
233 OOGL(glColor4fv(_color));
234 glVertexPointer(3, GL_FLOAT, 0, kLaserVertices);
235 glTexCoordPointer(2, GL_FLOAT, 0, laserTexCoords2);
236 glDrawArrays(GL_QUADS, 0, 8);
237
240 glDrawArrays(GL_QUADS, 0, 8);
241
242 [[self texture2] apply];
244 OOGL(glColor4f(_color[0],_color[1],_color[2],0.9));
245 glTexCoordPointer(2, GL_FLOAT, 0, laserTexCoords);
246 glDrawArrays(GL_QUADS, 0, 8);
247
249 OOGL(glDisableClientState(GL_TEXTURE_COORD_ARRAY));
250 OOGL(glDisable(GL_TEXTURE_2D));
251
253 OOCheckOpenGLErrors(@"OOLaserShotEntity after drawing %@", self);
254}
255
256
257- (BOOL) isEffect
258{
259 return YES;
260}
261
262
263- (BOOL) canCollide
264{
265 return NO;
266}
267
269{
271}
272
273
275{
277}
278
279
280+ (void) setUpTexture
281{
282 if (sShotTexture == nil)
283 {
284 sShotTexture = [[OOTexture textureWithName:@"oolite-laser-blur.png"
285 inFolder:@"Textures"
286 options:kOOTextureMinFilterMipMap | kOOTextureMagFilterLinear | kOOTextureAlphaMask | kOOTextureRepeatT
287 anisotropy:kOOTextureDefaultAnisotropy / 2.0
288 lodBias:0.0] retain];
289 [[OOGraphicsResetManager sharedManager] registerClient:(id<OOGraphicsResetClient>)[OOLaserShotEntity class]];
290
291 sShotTexture2 = [[OOTexture textureWithName:@"oolite-laser-blur2.png"
292 inFolder:@"Textures"
293 options:kOOTextureMinFilterMipMap | kOOTextureMagFilterLinear | kOOTextureAlphaMask | kOOTextureRepeatT
294 anisotropy:kOOTextureDefaultAnisotropy / 2.0
295 lodBias:0.0] retain];
296 }
297}
298
299
301{
302 if (sShotTexture2 == nil) [self setUpTexture];
303 return sShotTexture2;
304}
305
306
308{
309 if (sShotTexture == nil) [self setUpTexture];
310 return sShotTexture;
311}
312
313
314+ (void) resetGraphicsState
315{
316 [sShotTexture release];
318 [sShotTexture2 release];
320}
321
322
323@end
324
325
#define kLaserFlareWidth
#define kLaserRed
static OOTexture * sShotTexture2
static const GLfloat kLaserVertices[]
#define kLaserHalfWidth
static OOTexture * sShotTexture
#define kLaserCoreWidth
#define kLaserBrightness
#define kLaserGreen
#define kLaserBlue
#define kLaserDuration
#define kLaserAlpha
#define OO_ENTER_OPENGL()
#define M_PI
Definition OOMaths.h:73
void OOGLScaleModelView(Vector scale)
void OOGLPushModelView(void)
OOMatrix OOGLPopModelView(void)
@ OPENGL_STATE_ADDITIVE_BLENDING
Definition OOOpenGL.h:125
#define OOVerifyOpenGLState()
Definition OOOpenGL.h:136
BOOL OOCheckOpenGLErrors(NSString *format,...)
Definition OOOpenGL.m:39
#define OOSetOpenGLState(STATE)
Definition OOOpenGL.h:135
#define OOGL(statement)
Definition OOOpenGL.h:251
return nil
Vector vector_up_from_quaternion(Quaternion quat)
Vector vector_forward_from_quaternion(Quaternion quat)
const Quaternion kIdentityQuaternion
void quaternion_rotate_about_axis(Quaternion *quat, Vector axis, OOScalar angle)
double OOTimeDelta
Definition OOTypes.h:224
OOWeaponFacing
Definition OOTypes.h:228
@ WEAPON_FACING_FORWARD
Definition OOTypes.h:229
@ WEAPON_FACING_NONE
Definition OOTypes.h:234
@ WEAPON_FACING_AFT
Definition OOTypes.h:230
@ WEAPON_FACING_PORT
Definition OOTypes.h:231
@ WEAPON_FACING_STARBOARD
Definition OOTypes.h:232
#define UNIVERSE
Definition Universe.h:833
void setOrientation:(Quaternion quat)
Definition Entity.m:725
unsigned isShip
Definition Entity.h:91
void setOwner:(Entity *ent)
Definition Entity.m:576
ShipEntity * rootShipEntity()
Definition Entity.m:603
BoundingBox boundingBox
Definition Entity.h:145
unsigned isPlayer
Definition Entity.h:93
HPVector position
Definition Entity.h:112
HPVector absolutePositionForSubentityOffset:(HPVector offset)
Definition Entity.m:675
Quaternion normalOrientation()
Definition Entity.m:738
Vector velocity
Definition Entity.h:140
id init()
Definition Entity.m:68
void setStatus:(OOEntityStatus stat)
Definition Entity.m:787
void setPosition:(HPVector posn)
Definition Entity.m:647
OOMatrix drawRotationMatrix()
Definition Entity.m:879
float blueComponent()
Definition OOColor.m:362
float redComponent()
Definition OOColor.m:350
float greenComponent()
Definition OOColor.m:356
void registerClient:(id< OOGraphicsResetClient > client)
OOGraphicsResetManager * sharedManager()
void setRange:(GLfloat range)
NSString * descriptionComponents()
oneway void release()
Definition OOTexture.m:614
id textureWithName:inFolder:options:anisotropy:lodBias:(NSString *name,[inFolder] NSString *directory,[options] OOTextureFlags options,[anisotropy] GLfloat anisotropy,[lodBias] GLfloat lodBias)
Definition OOTexture.m:134
GLfloat weaponRange
Definition ShipEntity.h:311
voidpf uLong offset
Definition ioapi.h:140