Mac Magazin/MacEasy 30/Mac Magazin and MacEasy Magazine CD - Issue 30.iso/utilities/Mac OS X/Flurry/Flurry source/Source Folder/Spark.cpp

C/C++ Source or Header | 2002-01-25 | 5KB | 192 lines

// Spark.cpp: implementation of the Spark class.
//
//////////////////////////////////////////////////////////////////////

#include "std.h"
#include "Spark.h"

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

Spark::Spark()
{

}

Spark::~Spark()
{

}

void Spark::Draw()
{
    return;
    float width,sx,sy;
    float w,z;
    width = 60000.0f * sys_glWidth / 1024.0f;

    z = position[2];
    sx = position[0] * sys_glWidth / z + sys_glWidth * 0.5f;
    sy = position[1] * sys_glWidth / z + sys_glHeight * 0.5f;
    w = width*4.0f / z;

    float screenx = sx;
    float screeny = sy;

    const float black[4] = {0.0f,0.0f,0.0f,1.0f};

    glPushMatrix();
    glTranslatef(screenx,screeny,0.0f);
    float scale = w/50.0f;
    glScalef(scale,scale,0.0f);
    float a;
    float c = 0.0625f;
    for (int k=0;k<12;k++)
    {
        a = ((float) (rand() % 3600)) / 10.0f;
        glRotatef(a,0.0f,0.0f,1.0f);
        glBegin(GL_QUAD_STRIP);
        glColor4fv(black);
        glVertex2f(-3.0f,0.0f);
        a = 2.0f + (float) (rand() & 255) * c;
        glVertex2f(-3.0f,a);
        glColor4fv(color);
        glVertex2f(0.0f,0.0f);
        glColor4fv(black);
        glVertex2f(0.0f,a);
        glVertex2f(3.0f,0.0f);
        glVertex2f(3.0f,a);
        glEnd();
    }
    glPopMatrix();
}

#define BIGMYSTERY 1800.0
#define MAXANGLES 16384

void Spark::Update()
{
//    const float rotationsPerSecond = (float) (2.0*PI*TICKSPERSECOND/MAXANGLES);
    const float rotationsPerSecond = (float) (2.0*PI*fieldSpeed/MAXANGLES);
    double thisPointInRadians;
    double thisAngle = fTime*rotationsPerSecond;
    float cf;
    int i;
    double tmpX1,tmpY1,tmpZ1;
    double tmpX2,tmpY2,tmpZ2;
    double tmpX3,tmpY3,tmpZ3;
    double tmpX4,tmpY4,tmpZ4;
    double rotation;
    double cr;
    double sr;
    float cycleTime = 20.0f;

    if (currentColorMode == rainbowColorMode)
    {
        cycleTime = 1.5f;
    }
    else if (currentColorMode == tiedyeColorMode)
    {
        cycleTime = 4.5f;
    }
    else if (currentColorMode == cyclicColorMode)
    {
        cycleTime = 20.0f;
    }
    else if (currentColorMode == slowCyclicColorMode)
    {
        cycleTime = 120.0f;
    }
    float colorRot = (float) (2.0*PI/cycleTime);
    float redPhaseShift = 0.0f; //cycleTime * 0.0f / 3.0f
    float greenPhaseShift = cycleTime / 3.0f;
    float bluePhaseShift = cycleTime * 2.0f / 3.0f ;
    float baseRed;
    float baseGreen;
    float baseBlue;
    float colorTime = fTime;
    if (currentColorMode == whiteColorMode)
    {
        baseRed = 0.1875f;
        baseGreen = 0.1875f;
        baseBlue = 0.1875f;
    }
    else if (currentColorMode == multiColorMode)
    {
        baseRed = 0.0625f;
        baseGreen = 0.0625f;
        baseBlue = 0.0625f;
    }
    else if (currentColorMode == darkColorMode)
    {
        baseRed = 0.0f;
        baseGreen = 0.0f;
        baseBlue = 0.0f;
    }
    else
    {
        if (currentColorMode < slowCyclicColorMode)
        {
            colorTime = (currentColorMode / 6.0f) * cycleTime;
        }
        else
        {
            colorTime = fTime;
        }
        baseRed = 0.109375f * ((float) cos((colorTime+redPhaseShift)*colorRot)+1.0f);
        baseGreen = 0.109375f * ((float) cos((colorTime+greenPhaseShift)*colorRot)+1.0f);
        baseBlue = 0.109375f * ((float) cos((colorTime+bluePhaseShift)*colorRot)+1.0f);
    }

    float old[3];

    for (i=0;i<3;i++)
    {
        old[i] = position[i];
    }

    cf = ((float) (cos(7.0*((fTime)*rotationsPerSecond))+cos(3.0*((fTime)*rotationsPerSecond))+cos(13.0*((fTime)*rotationsPerSecond))));
    cf /= 6.0f;
    cf += 2.0f;
    thisPointInRadians = 2.0 * PI * (double) mystery / (double) BIGMYSTERY;

    color[0] = baseRed + 0.0625f * (0.5f + (float) cos((15.0 * (thisPointInRadians + 3.0*thisAngle))) + (float) sin((7.0 * (thisPointInRadians + thisAngle))));
    color[1] = baseGreen + 0.0625f * (0.5f + (float) sin(((thisPointInRadians) + thisAngle)));
    color[2] = baseBlue + 0.0625f * (0.5f + (float) cos((37.0 * (thisPointInRadians + thisAngle))));
    position[0] = fieldRange * cf * (float) cos(11.0 * (thisPointInRadians + (3.0*thisAngle)));
    position[1] = fieldRange * cf * (float) sin(12.0 * (thisPointInRadians + (4.0*thisAngle)));
    position[2] = fieldRange * (float) cos((23.0 * (thisPointInRadians + (12.0*thisAngle))));

    rotation = thisAngle*0.501 + 5.01 * (double) mystery / (double) BIGMYSTERY;
    cr = cos(rotation);
    sr = sin(rotation);
    tmpX1 = position[0] * cr - position[1] * sr;
    tmpY1 = position[1] * cr + position[0] * sr;
    tmpZ1 = position[2];

    tmpX2 = tmpX1 * cr - tmpZ1 * sr;
    tmpY2 = tmpY1;
    tmpZ2 = tmpZ1 * cr + tmpX1 * sr;

    tmpX3 = tmpX2;
    tmpY3 = tmpY2 * cr - tmpZ2 * sr;
    tmpZ3 = tmpZ2 * cr + tmpY2 * sr + seraphDistance;

    rotation = thisAngle*2.501 + 85.01 * (double) mystery / (double) BIGMYSTERY;
    cr = cos(rotation);
    sr = sin(rotation);
    tmpX4 = tmpX3 * cr - tmpY3 * sr;
    tmpY4 = tmpY3 * cr + tmpX3 * sr;
    tmpZ4 = tmpZ3;

    position[0] = (float) tmpX4 + RandBell(5.0f*fieldCoherence);
    position[1] = (float) tmpY4 + RandBell(5.0f*fieldCoherence);
    position[2] = (float) tmpZ4 + RandBell(5.0f*fieldCoherence);

    for (i=0;i<3;i++)
    {
        delta[i] = (position[i] - old[i])/fDeltaTime;
    }
}