OOTrumble.m

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/*
 
OOTrumble.m
 
Oolite
Copyright (C) 2004-2013 Giles C Williams and contributors
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program 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 General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
 
*/
 
#import "OOTrumble.h"
#import "Universe.h"
#import "PlayerEntity.h"
#import "OOTexture.h"
#import "ResourceManager.h"
#import "OOSound.h"
#import "OOStringParsing.h"
#import "OOMaths.h"
#import "MyOpenGLView.h"
 
 
static void InitTrumbleSounds(void);
static void PlayTrumbleIdle(void);
static void PlayTrumbleSqueal(void);
 
 
@implementation OOTrumble
 
- (id) init
{
    self = [super init];
    
    int i;
    for (i = 0; i < 4; i++)
    {
        colorPoint1[i] = 1.0;
        colorPoint2[i] = 1.0;
    }
    
    return self;
}
 
- (id) initForPlayer:(PlayerEntity*) p1
{
    self = [super init];
    
    [self setupForPlayer: p1 digram: @"a1"];
    
    return self;
}
 
- (id) initForPlayer:(PlayerEntity*) p1 digram:(NSString*) digramString
{
    self = [super init];
    
    [self setupForPlayer: p1 digram: digramString];
    
    return self;
}
 
- (void) setupForPlayer:(PlayerEntity*) p1 digram:(NSString*) digramString
{
    // set digram
    //
    digram[0] = [digramString characterAtIndex:0];
    digram[1] = [digramString characterAtIndex:1];
    
    // set player
    //
    player = p1;
    
    // set color points
    int r0 = (int)digram[0];
    int r1 = (int)digram[1];
    int pointscheme[6] = { 1, 1, 0, 0, 1, 1};
    int ps = r0 >> 2;   // first digram determines pattern of points
    pointscheme[0] = (ps >> 3) & 1;
    pointscheme[1] = (ps >> 2) & 1;
    pointscheme[2] = (ps >> 1) & 1;
    pointscheme[3] = ps & 1;
    pointscheme[4] = (ps >> 2) & 1;
    pointscheme[5] = (ps >> 3) & 1;
    
    GLfloat c1[4] = { 1.0, 1.0, 1.0, 1.0};
    GLfloat c2[4] = { 1.0, 0.0, 0.0, 1.0};
 
    // I am missing something. Please clarify the intent of the following statement.
    // The next statement shift the result of adding two masked values
    //  max_size = 0.90 + 0.50 * (((r0 & 0x38) + (r1 & 0x38)) >> 3) / 63.0; // inheritable
    // The next statement adds masked(r0) to shifted(masked(r1)
    //  max_size = 0.90 + 0.50 * ((r0 & 0x38) + ((r1 & 0x38) >> 3)) / 63.0; // inheritable
    // Sorry, but I cannot determine what you intended to do here.
    //
    // GILES: It's the second one, we're just determining a pseudo random max_size from the first digram
    max_size = 0.90 + 0.50 * ((r0 & 0x38) + ((r1 & 0x38) >> 3)) / 63.0; // inheritable
 
    // seed the random number generator
    //
    ranrot_srand(r0 + r1 *  256);
    
    // set random colors
    int col1 = r0 & 7;
    int col2 = r1 & 7;
    while (((col1 == 7)||(col1 == 0)) && ((col2 == 7)||(col2 == 0)))    // monochrome not allowed
    {
        if (col1 == col2)
            col1 = ranrot_rand() & 7;
        else
            col2 = ranrot_rand() & 7;
    }
    c1[0] = (GLfloat)(col1 & 1);
    c1[1] = (GLfloat)((col1 >> 1) & 1);
    c1[2] = (GLfloat)((col1 >> 2) & 1);
    c2[0] = (GLfloat)(col2 & 1);
    c2[1] = (GLfloat)((col2 >> 1) & 1);
    c2[2] = (GLfloat)((col2 >> 2) & 1);
    if (col1 == 0)
    {
        c1[0] = 0.5 + 0.1 * c2[1];  c1[1] = 0.5 + 0.1 * c2[2];  c1[2] = 0.5;
    }
    if (col1 == 7)
    {
        c1[0] = 1.0 - 0.1 * c2[1];  c1[1] = 1.0 - 0.1 * c2[2];  c1[2] = 0.9;
    }
    if (col2 == 0)
    {
        c2[0] = 0.5 + 0.1 * c1[2];  c2[1] = 0.5 + 0.1 * c1[0];  c2[2] = 0.5;
    }
    if (col2 == 7)
    {
        c2[0] = 1.0 - 0.1 * c1[2];  c2[1] = 1.0 - 0.1 * c1[0];  c2[2] = 0.9;
    }
    
    //  position and motion
    //
    position.x = (ranrot_rand() & 15)* 28 - 210;
    position.y = (ranrot_rand() & 15)* 28 - 210;
    //
    [self randomizeMotionX];
    [self randomizeMotionY];
    
    //  rotation
    //
    rotation = TRUMBLE_MAX_ROTATION * (randf() - randf());
    rotational_velocity = TRUMBLE_MAX_ROTATIONAL_VELOCITY * (randf() - randf());
    
    //
    int i;
    for (i = 0; i < 4; i++)
    {
        colorPoint1[i] = c1[i];
        colorPoint2[i] = c2[i];
    }
    //
    for (i = 0; i < 6; i++)
    {
        pointColor[i] = colorPoint1;
        if (pointscheme[i] == 0)
            pointColor[i] = colorPoint1;
        if (pointscheme[i] == 1)
            pointColor[i] = colorPoint2;
    }
    //
    for (i = 0; i < 4; i++)
    {
        colorEyes[i] = 0.2 * (2.0 * pointColor[3][i] + 2.0 * pointColor[1][i] + 1.0);   // eyes - paler than average
        colorBase[i] = 0.5 * (pointColor[2][i] + pointColor[3][i]); // mouth
    }
    //
    size = 0.5 * (1.0 + randf());
    [self calcGrowthRate];
    hunger = 0.0;
    discomfort = 0.0;
    //
    eye_position = NSMakePoint( 0.0, 0.075 * (randf() - randf()));
    eyeFrame = TRUMBLE_EYES_OPEN;
    //
    mouth_position = NSMakePoint( 0.0, 0.035 * (randf() - randf()));
    mouthFrame = TRUMBLE_MOUTH_NORMAL;
    //
    animation = TRUMBLE_ANIM_IDLE;
    nextAnimation = TRUMBLE_ANIM_IDLE;
    animationTime = 0.0;
    animationDuration = 1.5 + randf() * 3.0;    // time until next animation
    //
    texture = [OOTexture textureWithName:@"trumblekit.png"
                                inFolder:@"Textures"
                                 options:kOOTextureDefaultOptions | kOOTextureNoShrink
                              anisotropy:0.0f
                                 lodBias:kOOTextureDefaultLODBias];
    [texture retain];
    
    InitTrumbleSounds();
    
    readyToSpawn = NO;
}
 
- (void) dealloc
{
    [texture release];
    
    [super dealloc];
}
 
- (void) spawnFrom:(OOTrumble*) parentTrumble
{
    if (parentTrumble)
    {
        // mutate..
        unichar mutation1 = ranrot_rand() & ranrot_rand() & ranrot_rand() & 0xff;   // each bit has a 1/8 chance of being set
        unichar mutation2 = ranrot_rand() & ranrot_rand() & ranrot_rand() & 0xff;   // each bit has a 1/8 chance of being set
        unichar* parentdigram = [parentTrumble digram];
        unichar newdigram[2];
        newdigram[0] = parentdigram[0] ^ mutation1;
        newdigram[1] = parentdigram[1] ^ mutation2;
        //
        [self setupForPlayer: player digram: [NSString stringWithCharacters:newdigram length:2]];
        //
        size = [parentTrumble size] * 0.4;
        if (size < 0.5)
            size = 0.5; // minimum size
        position = [parentTrumble position];
        rotation = [parentTrumble rotation];
        movement = [parentTrumble movement];
        movement.y += 8.0;  // emerge!
    }
    else
    {
        size = 0.5; // minimum size
        position.x = (ranrot_rand() & 15)* 28 - 210;
        position.y = (ranrot_rand() & 15)* 28 - 210;
        [self randomizeMotionX];
        [self randomizeMotionY];
        rotation = TRUMBLE_MAX_ROTATION * (randf() - randf());
        rotational_velocity = TRUMBLE_MAX_ROTATIONAL_VELOCITY * (randf() - randf());
    }
    hunger = 0.25;
    [self calcGrowthRate];
    discomfort = 0.0;
    [self actionSleep];
}
 
- (void) calcGrowthRate
{
    float rsize = size / max_size;
    growth_rate = TRUMBLE_GROWTH_RATE * (1.0 - rsize);
}
 
 
- (unichar *)   digram
{
    return digram;
}
 
- (NSPoint)     position
{
    return position;
}
 
- (NSPoint)     movement
{
    return movement;
}
 
- (GLfloat)     rotation
{
    return rotation;
}
 
- (GLfloat)     size
{
    return size;
}
 
- (GLfloat)     hunger
{
    return hunger;
}
 
- (GLfloat)     discomfort
{
    return discomfort;
}
 
 
 
// AI methods here
- (void) actionIdle
{
    nextAnimation = TRUMBLE_ANIM_IDLE;
    animationDuration = 1.5 + 3.0 * randf();    // time until next animation
}
 
- (void) actionBlink
{
    nextAnimation = TRUMBLE_ANIM_BLINK;
    animationDuration = 0.5 + 0.5 * randf();    // time until next animation
}
 
- (void) actionSnarl
{
    nextAnimation = TRUMBLE_ANIM_SNARL;
    animationDuration = 4.0 + 1.0 * randf();    // time until next animation
}
 
- (void) actionProot
{
    nextAnimation = TRUMBLE_ANIM_PROOT;
    animationDuration = 1.5 + 0.5 * randf();    // time until next animation
}
 
- (void) actionShudder
{
    nextAnimation = TRUMBLE_ANIM_SHUDDER;
    animationDuration = 2.25 + randf() * 1.5;   // time until next animation
}
 
- (void) actionStoned
{
    nextAnimation = TRUMBLE_ANIM_STONED;
    animationDuration = 1.5 + randf() * 3.0;    // time until next animation
}
 
- (void) actionPop
{
    nextAnimation = TRUMBLE_ANIM_DIE;
    animationDuration = 1.5 + randf() * 3.0;    // time until next animation
}
 
- (void) actionSleep
{
    nextAnimation = TRUMBLE_ANIM_SLEEP;
    animationDuration = 12.0 + 12.0 * randf();  // time until next animation
}
 
- (void) actionSpawn
{
    nextAnimation = TRUMBLE_ANIM_SPAWN;
    animationDuration = 9.0 + 3.0 * randf();    // time until next animation
}
 
 
- (void) randomizeMotionX
{
    movement.x = 36 * (randf() - 0.5);
    movement.x += (movement.x > 0)? 2.0: -2.0;
    rotational_velocity = TRUMBLE_MAX_ROTATIONAL_VELOCITY * (randf() - randf());
}
 
- (void) randomizeMotionY
{
    movement.y = 36 * (randf() - 0.5);
    movement.y += (movement.y > 0)? 2.0: -2.0;
    rotational_velocity = TRUMBLE_MAX_ROTATIONAL_VELOCITY * (randf() - randf());
}
 
- (void) drawTrumble:(double) z
{
    /*
    draws a trumble body as a fan of triangles...
    2-------3-------4
    | \     |     / |
    |   \   |   /   |
    |     \ | /     |
    1-------0-------5
    
    */
    GLfloat wd = 96 * size;
    GLfloat ht = 96 * size;
    OOGL(glShadeModel(GL_SMOOTH));
    OOGL(glEnable(GL_TEXTURE_2D));
    
    OOGLPushModelView();
    
    OOGLTranslateModelView(make_vector(position.x, position.y, z));
    OOGLMultModelView(OOMatrixForRotationZ(rotation));
 
    [texture apply];
 
    //
    // Body..
    //
    OOGLBEGIN(GL_TRIANGLE_FAN);
        glColor4fv(pointColor[3]);
        glTexCoord2f( 0.25, 0.5);
        glVertex2f( 0.0,        -0.5 * ht);
        
        glColor4fv(pointColor[0]);
        glTexCoord2f( 0.0, 0.5);
        glVertex2f( -0.5 * wd,  -0.5 * ht);
        
        glColor4fv(pointColor[1]);
        glTexCoord2f( 0.0, 0.0);
        glVertex2f( -0.5 * wd,  0.5 * ht);
        
        glColor4fv(pointColor[2]);
        glTexCoord2f( 0.25, 0.0);
        glVertex2f( 0.0,        0.5 * ht);
        
        glColor4fv(pointColor[4]);
        glTexCoord2f( 0.5, 0.0);
        glVertex2f( 0.5 * wd,   0.5 * ht);
        
        glColor4fv(pointColor[5]);
        glTexCoord2f( 0.5, 0.5);
        glVertex2f( 0.5 * wd,   -0.5 * ht);
    OOGLEND();
    
    //
    // Eyes
    //
    GLfloat eyeTextureOffset = 0.0;
    switch(eyeFrame)
    {
        case TRUMBLE_EYES_NONE :
        case TRUMBLE_EYES_OPEN :
            eyeTextureOffset = 0.0; break;
        case TRUMBLE_EYES_SHUT :
            eyeTextureOffset = 0.25; break;
        case TRUMBLE_EYES_WIDE :
            eyeTextureOffset = 0.5; break;
    }
    
    OOGLTranslateModelView(make_vector(eye_position.x * wd, eye_position.y * ht, 0.0));
    
    OOGL(glColor4fv(colorEyes));
    OOGLBEGIN(GL_QUADS);
        glTexCoord2f( 0.5, eyeTextureOffset);
        glVertex2f( -0.5 * wd,  0.20 * ht);
        
        glTexCoord2f( 1.0, eyeTextureOffset);
        glVertex2f( 0.5 * wd,   0.20 * ht);
        
        glTexCoord2f( 1.0, eyeTextureOffset + 0.25);
        glVertex2f( 0.5 * wd,   -0.30 * ht);
        
        glTexCoord2f( 0.5, eyeTextureOffset + 0.25);
        glVertex2f( -0.5 * wd,  -0.30 * ht);
    OOGLEND();
    
    //
    // Mouth
    //
    GLfloat mouthTextureOffset = 0.0;
    switch(mouthFrame)
    {
        case TRUMBLE_MOUTH_POUT :
            mouthTextureOffset = 0.500; break;
        case TRUMBLE_MOUTH_NONE :
        case TRUMBLE_MOUTH_NORMAL :
            mouthTextureOffset = 0.625; break;
        case TRUMBLE_MOUTH_GROWL:
            mouthTextureOffset = 0.750; break;
        case TRUMBLE_MOUTH_SNARL:
            mouthTextureOffset = 0.875; break;
    }
    
    OOGLTranslateModelView(make_vector(mouth_position.x * wd, mouth_position.y * ht, 0.0));
    
    OOGL(glColor4fv(colorBase));
    OOGLBEGIN(GL_QUADS);
        glTexCoord2f( 0.0, mouthTextureOffset);
        glVertex2f( -0.25 * wd, -0.10 * ht);
        
        glTexCoord2f( 0.25, mouthTextureOffset);
        glVertex2f( 0.25 * wd,  -0.10 * ht);
        
        glTexCoord2f( 0.25, mouthTextureOffset + 0.125);
        glVertex2f( 0.25 * wd,  -0.35 * ht);
        
        glTexCoord2f( 0.0, mouthTextureOffset + 0.125);
        glVertex2f( -0.25 * wd, -0.35 * ht);
    OOGLEND();  
    
    // finally..
    OOGLPopModelView();
    OOGL(glDisable(GL_TEXTURE_2D));
}
 
- (void) updateTrumble:(double) delta_t
{
    // player movement
    NSPoint p_mov = NSMakePoint(TRUMBLE_MAX_ROTATIONAL_VELOCITY * [player dialPitch],   TRUMBLE_MAX_ROTATIONAL_VELOCITY * [player dialRoll]);
    switch ([UNIVERSE viewDirection])
    {
        GLfloat t;
        case VIEW_AFT:
            p_mov.x = -p_mov.x;
            p_mov.y = -p_mov.y;
            break;
        case VIEW_STARBOARD:
            t = p_mov.x;
            p_mov.x = -p_mov.y;
            p_mov.y = t;
            break;
        case VIEW_PORT:
            t = p_mov.x;
            p_mov.x = p_mov.y;
            p_mov.y = -t;
            break;
        
        default:
            break;
    }
    p_mov.x *= -4.0;
    
    // movement
    //
    GLfloat wd = 0.5 * 96 * size;
    GLfloat ht = 0.5 * 96 * size;
    //
    GLfloat bumpx = 320 * 1.5 - wd;
    GLfloat bumpy = 240 * 1.5 - ht;
    //
    position.x += delta_t * movement.x;
    if ((position.x < -bumpx)||(position.x > bumpx))
    {
        position.x = (position.x < -bumpx)? -bumpx : bumpx;
        [self randomizeMotionX];
    }   
    position.y += delta_t * (movement.y + p_mov.x);
    if ((position.y < -bumpy)||(position.y > bumpy))
    {
        position.y = (position.y < -bumpy)? -bumpy : bumpy;
        [self randomizeMotionY];
    }
    
    // rotation
    //
    rotation += delta_t * (rotational_velocity + p_mov.y);
    if (animation != TRUMBLE_ANIM_DIE)
    {
        if (rotation < -TRUMBLE_MAX_ROTATION)
        {
            rotation = -TRUMBLE_MAX_ROTATION;
            rotational_velocity = TRUMBLE_MAX_ROTATIONAL_VELOCITY * 0.5 * (randf() + randf());
        }
        if (rotation > TRUMBLE_MAX_ROTATION)
        {
            rotation = TRUMBLE_MAX_ROTATION;
            rotational_velocity = -TRUMBLE_MAX_ROTATIONAL_VELOCITY * 0.5 * (randf() + randf());
        }
    }
    // growth
    //
    size += delta_t * growth_rate;
    hunger += delta_t * (growth_rate + TRUMBLE_GROWTH_RATE);
    if (size > max_size)    // fully_grown.. stop growing
    {
        size = max_size;
        growth_rate = 0.0;
    }
    [self calcGrowthRate];
    if (hunger > 0.75)
        growth_rate = 0.0;
    if (hunger > 1.0)
        hunger = 1.0;   // clamp
 
    // feelings
    //
    GLfloat temp = [player hullHeatLevel];
    discomfort += delta_t * hunger * 0.02 * (1.0 - hunger);
    if (temp > 0.33)
        discomfort += delta_t * (temp - 0.33) * (temp - 0.33) * 0.05;
    if (discomfort > 1.0)
        discomfort = 1.0;   // clamp
    
    // feeding & reproducing
    //
    // am I really hungry?
    if (hunger > 0.50)
    {
        // consult menu...
        ShipEntity *selectedCargopod = nil;
        float mostYummy = 0.0;
        NSMutableArray *cargopods = [player cargo]; // the cargo pods
        NSUInteger i, n_pods = [cargopods count];
        for (i = 0 ; i < n_pods; i++)
        {
            ShipEntity *cargopod = [cargopods objectAtIndex:i];
            OOCommodityType cargo_type = [cargopod commodityType];
            float yumminess = (1.0 + randf()) * [[UNIVERSE commodityMarket] trumbleOpinionForGood:cargo_type];
            if (yumminess > mostYummy)
            {
                selectedCargopod = cargopod;
                mostYummy = yumminess;
            }
        }
        if (selectedCargopod)
        {
            // feed
            float trumbleAppetiteAccumulator = [player trumbleAppetiteAccumulator];
            
            trumbleAppetiteAccumulator += hunger;
            hunger = 0.0;
            discomfort -= mostYummy * 0.5;
            if (discomfort < 0.0)
                discomfort = 0.0;
            if (trumbleAppetiteAccumulator > 10.0)
            {
                // eaten all of this cargo!
                NSString* ms = [NSString stringWithFormat:DESC(@"trumbles-eat-@"),
                                [UNIVERSE displayNameForCommodity:[selectedCargopod commodityType]]];
                
                [UNIVERSE addMessage: ms forCount: 4.5];
                [cargopods removeObject:selectedCargopod];
                trumbleAppetiteAccumulator -= 10.0;
                
                // consider breeding - must be full grown and happy
                if ((size > 0.95)&&(discomfort < 0.25))
                {
                    readyToSpawn = YES;
                }
                
                [player setTrumbleAppetiteAccumulator:trumbleAppetiteAccumulator];
            }
        }
    }
    
    // animations
    //
    switch (animation)
    {
        case TRUMBLE_ANIM_SNARL :
            [self updateSnarl: delta_t];    break;
        case TRUMBLE_ANIM_SHUDDER :
            [self updateShudder: delta_t];  break;
        case TRUMBLE_ANIM_STONED :
            [self updateStoned: delta_t];   break;
        case TRUMBLE_ANIM_DIE :
            [self updatePop: delta_t];      break;
        case TRUMBLE_ANIM_BLINK :
            [self updateBlink: delta_t];    break;
        case TRUMBLE_ANIM_PROOT :
            [self updateProot: delta_t];    break;
        case TRUMBLE_ANIM_SLEEP :
            [self updateSleep: delta_t];    break;
        case TRUMBLE_ANIM_SPAWN :
            [self updateSpawn: delta_t];    break;
        case TRUMBLE_ANIM_IDLE :
        default:
            [self updateIdle: delta_t]; break;
    }
    
    
}
 
- (void) updateIdle:(double) delta_t
{
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // blink or proot or idle and/or change direction
        [self actionIdle];
        if (randf() < 0.25)
            [self actionBlink];
        if (randf() < 0.10)
            [self randomizeMotionX];
        if (randf() < 0.10)
            [self randomizeMotionY];
        if (randf() < 0.05)
            [self actionProot];
        if (randf() < 0.01)
            [self actionSleep];
        if (randf() < 0.01)
            [self actionSnarl];
        //
        if (readyToSpawn)
        {
            [self actionSpawn];
            readyToSpawn = NO;
        }
        //
        if (discomfort > 0.5 + randf())
        {
            [self actionShudder];
        }
        //
        if (discomfort > 0.96)
        {
            [self actionPop];
        }
        //
        animation = nextAnimation;
        animationTime = 0.0;
    }
}
 
- (void) updateBlink:(double) delta_t
{
    eyeFrame = TRUMBLE_EYES_SHUT;
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // blink or proot or idle
        [self actionIdle];
        if (randf() < 0.05)
            [self actionBlink];
        if (randf() < 0.1)
            [self actionProot];
        animation = nextAnimation;
        animationTime = 0.0;
        eyeFrame = TRUMBLE_EYES_OPEN;
    }
}
 
- (void) updateSnarl:(double) delta_t
{
    int pc = 100 * animationTime / animationDuration;
    if (pc < 25)
    {
        eyeFrame = TRUMBLE_EYES_SHUT;
        mouthFrame = TRUMBLE_MOUTH_GROWL;
    }
    if ((pc >=25)&&(pc < 90))
    {
        double vibr = (pc & 1)? -1.0 : 1.0;
        if (digram[1] & 4)
            position.x += size * vibr * 0.5;
        else
            position.y += size * vibr * 0.5;
        eyeFrame = TRUMBLE_EYES_WIDE;
        if (pc & 2)
            mouthFrame = TRUMBLE_MOUTH_SNARL;
        else
            mouthFrame = TRUMBLE_MOUTH_GROWL;
    }
    if ((pc >=90)&&(pc < 100))
    {
        eyeFrame = TRUMBLE_EYES_WIDE;
        mouthFrame = TRUMBLE_MOUTH_GROWL;
    }
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // blink or idle
        [self actionIdle];
        if (randf() < 0.1)
            [self actionBlink];
        animation = nextAnimation;
        animationTime = 0.0;
        eyeFrame = TRUMBLE_EYES_OPEN;
        mouthFrame = TRUMBLE_MOUTH_NORMAL;
    }
}
 
- (void) updateProot:(double) delta_t
{
    if (!animationTime)
    {
        animationStage = 0;
    }
    int pc = 100 * animationTime / animationDuration;
    if (pc < 10)
    {
        eyeFrame = TRUMBLE_EYES_SHUT;
        mouthFrame = TRUMBLE_MOUTH_POUT;
    }
    if (pc >=10)
    {
        double vibr = (pc & 2)? -1.0 : 1.0;
        position.x += size * vibr * 0.25;
        eyeFrame = TRUMBLE_EYES_SHUT;
        mouthFrame = TRUMBLE_MOUTH_GROWL;
        if (!animationStage)
        {
            animationStage = 1;
            PlayTrumbleIdle();
        }
    }
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // blink or idle
        [self actionIdle];
        if (randf() < 0.1)
            [self actionBlink];
        animation = nextAnimation;
        animationTime = 0.0;
        eyeFrame = TRUMBLE_EYES_OPEN;
        mouthFrame = TRUMBLE_MOUTH_NORMAL;
    }
}
 
- (void) updateShudder:(double) delta_t
{
    if (!animationTime)
    {
        eyeFrame = TRUMBLE_EYES_WIDE;
        mouthFrame = TRUMBLE_MOUTH_GROWL;
        PlayTrumbleSqueal();
    }
    int pc = 100 * animationTime / animationDuration;
    if (pc < 10)
    {
        eyeFrame = TRUMBLE_EYES_WIDE;
        mouthFrame = TRUMBLE_MOUTH_GROWL;
    }
    if (pc >= 10)
    {
        double vibr = (pc & 2)? -0.25 : 0.25;
        position.x += size * vibr;
        eyeFrame = TRUMBLE_EYES_OPEN;
        mouthFrame = TRUMBLE_MOUTH_GROWL;
    }
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // feel better
        discomfort *= 0.9;
        // blink or idle
        [self actionIdle];
        if (randf() < 0.1)
            [self actionBlink];
        animation = nextAnimation;
        animationTime = 0.0;
        eyeFrame = TRUMBLE_EYES_OPEN;
        mouthFrame = TRUMBLE_MOUTH_NORMAL;
    }
}
 
- (void) updateStoned:(double) delta_t
{
}
 
- (void) updatePop:(double) delta_t
{
    if (!animationTime)
    {
        eyeFrame = TRUMBLE_EYES_SHUT;
        mouthFrame = TRUMBLE_MOUTH_GROWL;
        movement.y = (ranrot_rand() & 7);
        if (randf() < 0.5)
            rotational_velocity = 63 + (ranrot_rand() & 127);
        else
            rotational_velocity = -63 - (ranrot_rand() & 127);
        // squeal here!
        PlayTrumbleSqueal();
    }
    float pc = animationTime / animationDuration;
    
    // fading alpha
    colorPoint1[1] *= (1.0 - delta_t);
    colorPoint2[1] *= (1.0 - delta_t);
    colorPoint1[2] *= (1.0 - delta_t);
    colorPoint2[2] *= (1.0 - delta_t);
    colorPoint1[3] = (1.0 - pc);
    colorPoint2[3] = (1.0 - pc);
    colorBase[3] = (1.0 - pc);
    
    // falling
    movement.y -= delta_t * 98.0;
    rotational_velocity *= (1.0 + delta_t);
    
    // shrinking
    size -= delta_t * (1.0 - pc) * size;
    
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // kaputnik!
        [player removeTrumble:self];
    }
}
 
- (void) updateSleep:(double) delta_t
{
    if (!animationTime)
    {
        saved_float1 = eye_position.y;
        saved_float2 = mouth_position.y;
    }
    eyeFrame = TRUMBLE_EYES_SHUT;
    int pc = 512 * animationTime / animationDuration;
    if (pc & 16)
    {
        double vibr = (pc & 2)? -0.0025 : 0.0025;
        eye_position.y += size * vibr;
        mouth_position.y += size * vibr * -0.5;
    }
    else
    {
        eye_position.y = saved_float1;
        mouth_position.y = saved_float2;
    }
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // idle or proot
        eye_position.y = saved_float1;
        mouth_position.y = saved_float2;
        [self actionIdle];
        if (randf() < 0.25)
            [self actionProot];
        animation = nextAnimation;
        animationTime = 0.0;
        eyeFrame = TRUMBLE_EYES_OPEN;
    }
}
 
- (void) updateSpawn:(double) delta_t
{
    movement.x *= (1.0 - delta_t);
    movement.y *= (1.0 - delta_t);
    rotation *= (1.0 - delta_t);
    rotational_velocity *= (1.0 - delta_t);
    eyeFrame = TRUMBLE_EYES_WIDE;
    mouthFrame = TRUMBLE_MOUTH_POUT;
    int pc = 256 * animationTime / animationDuration;
    double vibr = (pc & 2)? -0.002 * pc : 0.002 * pc;
    position.x += size * vibr;
    animationTime += delta_t;
    if (animationTime > animationDuration)
    {
        // proot
        eye_position.y = saved_float1;
        mouth_position.y = saved_float2;
        [self actionProot];
        animation = nextAnimation;
        animationTime = 0.0;
        eyeFrame = TRUMBLE_EYES_OPEN;
        mouthFrame = TRUMBLE_MOUTH_NORMAL;
        [self randomizeMotionX];
        [player addTrumble:self];
    }
}
 
- (NSDictionary*) dictionary
{
    return [NSDictionary dictionaryWithObjectsAndKeys:
        [NSString stringWithCharacters:digram length:2],    @"digram",
        [NSNumber numberWithFloat:hunger],                  @"hunger",
        [NSNumber numberWithFloat:discomfort],              @"discomfort",
        [NSNumber numberWithFloat:size],                    @"size",
        [NSNumber numberWithFloat:growth_rate],             @"growth_rate",
        [NSNumber numberWithFloat:rotation],                @"rotation",
        [NSNumber numberWithFloat:rotational_velocity],     @"rotational_velocity",
        StringFromPoint(position),                          @"position",
        StringFromPoint(movement),                          @"movement",
        nil];
}
 
- (void) setFromDictionary:(NSDictionary*) dict
{
    NSString* digramString = (NSString*)[dict objectForKey:@"digram"];
    [self setupForPlayer: player digram: digramString];
    hunger =        [[dict objectForKey: @"hunger"]         floatValue];
    discomfort =    [[dict objectForKey: @"discomfort"]     floatValue];
    size =          [[dict objectForKey: @"size"]           floatValue];
    growth_rate =   [[dict objectForKey: @"growth_rate"]    floatValue];
    rotation =      [[dict objectForKey: @"rotation"]       floatValue];
    rotational_velocity =   [[dict objectForKey: @"rotational_velocity"]    floatValue];
    position =  PointFromString([dict objectForKey: @"position"]);
    movement =  PointFromString([dict objectForKey: @"movement"]);
}
 
@end
 
 
static OOSoundSource    *sTrumbleSoundSource;
static OOSound          *sTrumbleIdleSound;
static OOSound          *sTrumbleSqealSound;
 
static void InitTrumbleSounds(void)
{
    if (sTrumbleSoundSource == nil)
    {
        sTrumbleSoundSource = [[OOSoundSource alloc] init];
        sTrumbleIdleSound = [[OOSound alloc] initWithCustomSoundKey:@"[trumble-idle]"];
        sTrumbleSqealSound = [[OOSound alloc] initWithCustomSoundKey:@"[trumble-squeal]"];
    }
}
 
 
static void PlayTrumbleIdle(void)
{
    // Only play idle sound if no trumble is making noise.
    if (![sTrumbleSoundSource isPlaying])
    {
        // trumble sound from random direction - where's it gone now?
        [sTrumbleSoundSource setPosition:OORandomUnitVector()];
        [sTrumbleSoundSource playSound:sTrumbleIdleSound];
    }
}
 
 
static void PlayTrumbleSqueal(void)
{
    // Play squeal sound if no trumble is currently squealing, but trumping idle sound.
    if (![sTrumbleSoundSource isPlaying] || [sTrumbleSoundSource sound] == sTrumbleIdleSound)
    {
        // trumble sound from random direction - where's it gone now?
        [sTrumbleSoundSource setPosition:OORandomUnitVector()];
        [sTrumbleSoundSource playSound:sTrumbleSqealSound];
    }
}