TextureStore.m File Reference

import "OOCocoa.h"
import "TextureStore.h"
import "OOMaths.h"
import "Universe.h"
import "MyOpenGLView.h"
import "OOCollectionExtractors.h"
import "OOTextureGenerator.h"

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Go to the source code of this file.

Macros
#define	DEBUG_DUMP   ( 0 && OOLITE_DEBUG)
#define	PROC_TEXTURE_SIZE   512

Functions
static FloatRGB	FloatRGBFromDictColor (NSDictionary *dictionary, NSString *key)
static FloatRGB	Blend (float fraction, FloatRGB a, FloatRGB b)
static FloatRGB	PlanetTextureColor (float q, float impress, float bias, FloatRGB seaColor, FloatRGB paleSeaColor, FloatRGB landColor, FloatRGB paleLandColor)
static void	fillSquareImageDataWithCloudTexture (unsigned char *imageBuffer, int width, OOColor *cloudcolor, float impress, float bias)
static void	fillSquareImageWithPlanetTex (unsigned char *imageBuffer, int width, float impress, float bias, FloatRGB seaColor, FloatRGB paleSeaColor, FloatRGB landColor, FloatRGB paleLandColor)
void	fillRanNoiseBuffer ()
static void	addNoise (float *buffer, int p, int n, float scale)
static float	q_factor (float *accbuffer, int x, int y, int width, BOOL polar_y_smooth, float polar_y_value, BOOL polar_x_smooth, float polar_x_value, float impress, float bias)

Variables
static NSString *const	kOOLogPlanetTextureGen = @"texture.planet.generate"
static RANROTSeed	sNoiseSeed
static float	ranNoiseBuffer [128 *128]

Macro Definition Documentation

DEBUG_DUMP

#define DEBUG_DUMP   ( 0 && OOLITE_DEBUG)

Definition at line 40 of file TextureStore.m.

PROC_TEXTURE_SIZE

#define PROC_TEXTURE_SIZE   512

Definition at line 112 of file TextureStore.m.

Function Documentation

addNoise()

static void addNoise ( float * buffer, int p, int n, float scale )

static

Definition at line 191 of file TextureStore.m.

{
    int x, y;
    
    float r = (float)p / (float)n;
    for (y = 0; y < p; y++) for (x = 0; x < p; x++)
    {
        int ix = floor( (float)x / r);
        int jx = (ix + 1) % n;
        int iy = floor( (float)y / r);
        int jy = (iy + 1) % n;
        float qx = x / r - ix;
        float qy = y / r - iy;
        ix &= 127;
        iy &= 127;
        jx &= 127;
        jy &= 127;
        float rix = OOLerp(ranNoiseBuffer[iy * 128 + ix], ranNoiseBuffer[iy * 128 + jx], qx);
        float rjx = OOLerp(ranNoiseBuffer[jy * 128 + ix], ranNoiseBuffer[jy * 128 + jx], qx);
        float rfinal = scale * OOLerp(rix, rjx, qy);
        
        buffer[y * p + x] += rfinal;
    }
}

References ranNoiseBuffer, x, and y.

Referenced by fillSquareImageDataWithCloudTexture(), and TextureStore::getCloudTextureNameFor:color:impress:intoData:width:height:.

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Blend()

static FloatRGB Blend ( float fraction, FloatRGB a, FloatRGB b )

static

Definition at line 64 of file TextureStore.m.

{
    return (FloatRGB)
    {
        OOLerp(a.r, b.r, fraction),
        OOLerp(a.g, b.g, fraction),
        OOLerp(a.b, b.b, fraction)
    };
}

References FloatRGB::b, FloatRGB::g, and FloatRGB::r.

Referenced by PlanetTextureColor().

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fillRanNoiseBuffer()

void fillRanNoiseBuffer

(

)

Definition at line 181 of file TextureStore.m.

{
    sNoiseSeed = RANROTGetFullSeed();
    
    int i;
    for (i = 0; i < 16384; i++)
        ranNoiseBuffer[i] = randf();
}

References randf(), ranNoiseBuffer, RANROTGetFullSeed(), and sNoiseSeed.

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fillSquareImageDataWithCloudTexture()

static void fillSquareImageDataWithCloudTexture ( unsigned char * imageBuffer, int width, OOColor * cloudcolor, float impress, float bias )

static

Definition at line 247 of file TextureStore.m.

{
    NSCParameterAssert(width > 0);
    
    float accbuffer[width * width];
    memset(accbuffer, 0, sizeof accbuffer);
    int x, y;
 
    GLfloat rgba[4];
    rgba[0] = [cloudcolor redComponent];
    rgba[1] = [cloudcolor greenComponent];
    rgba[2] = [cloudcolor blueComponent];
    rgba[3] = [cloudcolor alphaComponent];
 
    int octave = 8;
    float scale = 0.5;
    while (octave < width)
    {
        addNoise(accbuffer, width, octave, scale);
        octave *= 2;
        scale *= 0.5;
    }
    
    float pole_value = (impress * accbuffer[0] - bias < 0.0)? 0.0: 1.0;
    
    for (y = 0; y < width; y++) for (x = 0; x < width; x++)
    {
        float q = q_factor(accbuffer, x, y, width, YES, pole_value, NO, 0.0, impress, bias);
        
        imageBuffer[0 + 4 * (y * width + x) ] = 255 * rgba[0];
        imageBuffer[1 + 4 * (y * width + x) ] = 255 * rgba[1];
        imageBuffer[2 + 4 * (y * width + x) ] = 255 * rgba[2];
        imageBuffer[3 + 4 * (y * width + x) ] = 255 * rgba[3] * q;
    }
#if DEBUG_DUMP
    NSString *name = [NSString stringWithFormat:@"atmosphere-%u-%u-old", sNoiseSeed.high, sNoiseSeed.low];
    OOLog(@"planetTex.dump", [NSString stringWithFormat:@"Saving generated texture to file %@.", name]);
    
    [[UNIVERSE gameView] dumpRGBAToFileNamed:name
                                       bytes:imageBuffer
                                       width:width
                                      height:width
                                    rowBytes:width * 4];
#endif
}

References addNoise(), OOColor::alphaComponent, OOColor::blueComponent, OOColor::greenComponent, OOLog, q_factor(), OOColor::redComponent, x, and y.

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fillSquareImageWithPlanetTex()

static void fillSquareImageWithPlanetTex ( unsigned char * imageBuffer, int width, float impress, float bias, FloatRGB seaColor, FloatRGB paleSeaColor, FloatRGB landColor, FloatRGB paleLandColor )

static

Definition at line 293 of file TextureStore.m.

{
    float accbuffer[width * width];
    memset(accbuffer, 0, sizeof accbuffer);
    
    int octave = 8;
    float scale = 0.5;
    while (octave < width)
    {
        addNoise(accbuffer, width, octave, scale);
        octave *= 2;
        scale *= 0.5;
    }
    
    float pole_value = (impress + bias > 0.5)? 0.5 * (impress + bias) : 0.0;
    
    int x, y;
    for (y = 0; y < width; y++) for (x = 0; x < width; x++)
    {
        float q = q_factor(accbuffer, x, y, width, YES, pole_value, NO, 0.0, impress, bias);
 
        float yN = q_factor(accbuffer, x, y - 1, width, YES, pole_value, NO, 0.0, impress, bias);
        float yS = q_factor(accbuffer, x, y + 1, width, YES, pole_value, NO, 0.0, impress, bias);
        float yW = q_factor(accbuffer, x - 1, y, width, YES, pole_value, NO, 0.0, impress, bias);
        float yE = q_factor(accbuffer, x + 1, y, width, YES, pole_value, NO, 0.0, impress, bias);
 
        Vector norm = make_vector( 24.0 * (yW - yE), 24.0 * (yS - yN), 2.0);
        
        norm = vector_normal(norm);
        
        GLfloat shade = pow(norm.z, 3.2);
        
        FloatRGB color = PlanetTextureColor(q, impress, bias, seaColor, paleSeaColor, landColor, paleLandColor);
        
        color.r *= shade;
        color.g *= shade;
        color.b *= shade;
        
        imageBuffer[0 + 4 * (y * width + x)] = 255 * color.r;
        imageBuffer[1 + 4 * (y * width + x)] = 255 * color.g;
        imageBuffer[2 + 4 * (y * width + x)] = 255 * color.b;
        imageBuffer[3 + 4 * (y * width + x)] = 255;
    }
#if DEBUG_DUMP
    OOLog(@"planetTex.dump", [NSString stringWithFormat:@"Saving generated texture to file planet-%u-%u-old.", sNoiseSeed.high, sNoiseSeed.low]);
    
    [[UNIVERSE gameView] dumpRGBAToFileNamed:[NSString stringWithFormat:@"planet-%u-%u-old", sNoiseSeed.high, sNoiseSeed.low]
                                       bytes:imageBuffer
                                       width:width
                                      height:width
                                    rowBytes:width * 4];
#endif
}

FloatRGBFromDictColor()

static FloatRGB FloatRGBFromDictColor ( NSDictionary * dictionary, NSString * key )

static

Definition at line 49 of file TextureStore.m.

{
    OOColor *color = [dictionary objectForKey:key];
    if (color == nil)
    {
        // could not get a color from the dicitionary, return white color instead of hitting the assert below
        color = [OOColor colorWithDescription:@"whiteColor"];
        OOLog(@"textureStore.FloatRGBFromDictColor.nilColor", @"Expected color for key \"%@\" in dictionary %@, got nil. Setting color to %@", key, dictionary, [color rgbaDescription]);
    }
    NSCAssert1([color isKindOfClass:[OOColor class]], @"Expected OOColor, got %@", [color class]);
    
    return (FloatRGB){ [color redComponent], [color greenComponent], [color blueComponent] };
}

References OOColor::blueComponent, OOColor::colorWithDescription:, OOColor::greenComponent, nil, OOLog, and OOColor::redComponent.

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PlanetTextureColor()

static FloatRGB PlanetTextureColor ( float q, float impress, float bias, FloatRGB seaColor, FloatRGB paleSeaColor, FloatRGB landColor, FloatRGB paleLandColor )

static

Definition at line 75 of file TextureStore.m.

{
    const FloatRGB kWhite = { 1.0, 1.0, 1.0 };
    float maxq = impress + bias;
    
    float hi = 0.66667 * maxq;
    float oh = 1.0 / hi;
    float ih = 1.0 / (1.0 - hi);
    
    if (q <= 0.0)
    {
        return seaColor;
    }
    if (q > 1.0)
    {
        return (FloatRGB){ 1.0f, 1.0f, 1.0f };
    }
    if (q < 0.01)
    {
        return Blend(q * 100.0f, paleSeaColor, landColor);
    }
    if (q > hi)
    {
        return Blend((q - hi) * ih, paleLandColor, kWhite); // snow capped peaks
    }
    
    return Blend((hi - q) * oh, paleLandColor, landColor);
}

References Blend().

Referenced by TextureStore::getCloudTextureNameFor:color:impress:intoData:width:height:.

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q_factor()

static float q_factor ( float * accbuffer, int x, int y, int width, BOOL polar_y_smooth, float polar_y_value, BOOL polar_x_smooth, float polar_x_value, float impress, float bias )

static

Definition at line 217 of file TextureStore.m.

{
    while ( x < 0 ) x+= width;
    while ( y < 0 ) y+= width;
    while ( x >= width ) x-= width;
    while ( y >= width ) y-= width;
 
    float q = accbuffer[ y * width + x];    // 0.0 -> 1.0
 
    q *= impress;   // impress
    q += bias;      // + bias
 
    float polar_y = (2.0f * y - width) / (float) width;
    float polar_x = (2.0f * x - width) / (float) width;
    
    polar_x *= polar_x;
    polar_y *= polar_y;
    
    if (polar_x_smooth)
        q = q * (1.0 - polar_x) + polar_x * polar_x_value;
    if (polar_y_smooth)
        q = q * (1.0 - polar_y) + polar_y * polar_y_value;
 
    if (q > 1.0)    q = 1.0;
    if (q < 0.0)    q = 0.0;
    
    return q;
}

References x, and y.

Referenced by fillSquareImageDataWithCloudTexture(), and TextureStore::getCloudTextureNameFor:color:impress:intoData:width:height:.

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Variable Documentation

kOOLogPlanetTextureGen

NSString* const kOOLogPlanetTextureGen = @"texture.planet.generate"

static

Definition at line 43 of file TextureStore.m.

ranNoiseBuffer

float ranNoiseBuffer[128 *128]

static

Definition at line 179 of file TextureStore.m.

Referenced by addNoise(), and fillRanNoiseBuffer().

sNoiseSeed

RANROTSeed sNoiseSeed

static

Definition at line 178 of file TextureStore.m.

Referenced by fillRanNoiseBuffer(), and TextureStore::getCloudTextureNameFor:color:impress:intoData:width:height:.