Celestin Apprentice 5/Apprentice-Release5.iso/Source Code/Libraries/Dots & Pixels/sources/screendots.cp

Text File | 1995-09-29 | 5KB | 202 lines

#include <QuickDraw.h>

#include "C_randomizer.h"
#include "screenarea.h"
#include "screendots.h"

void screendots::init( int aantaldots)
{
    numdots = aantaldots;
    current_intensity = 0;

    dot_addresses     = new unsigned char *[ numdots];
    old_dot_addresses = new unsigned char *[ numdots];

    for( int i = 0; i < numdots; i++)
    {
        dot_addresses[ i]     = waste_area;
        old_dot_addresses[ i] = waste_area;
    }
}

void screendots::make_a_move( const unsigned char diff)
{
    compute_addresses();
    MoveDots( diff);
    swap();
}

void screendots::make_a_multimove(
        const int *offsets, int numoffsets, const unsigned char diff)
{
    compute_addresses();
    MoveMultiDots( offsets, numoffsets, diff);
    swap();
}

void screendots::make_a_stereo_move( const char disparity)
{
    compute_addresses();
    MoveStereoDots( disparity);
    swap();
}

void screendots::EraseDots()
{
    unsigned char **the_dots = old_dot_addresses;

    const unsigned char intensity = current_intensity;
    const int limit = numdots;
    for( int i = 0; i < limit; i++)
    {
        **the_dots++ -= intensity;
    }
    current_intensity = 0;
}

void screendots::EraseMultiDots( const int *offsets, int numoffsets)
{
    unsigned char **the_dots = old_dot_addresses;

    const unsigned char intensity = current_intensity;
    const int limit = numdots;
    for( int i = 0; i < limit; i++)
    {
        unsigned char *centerdot = *the_dots++;
        const int *curoffset = offsets;
        for( int j = 0; j < numoffsets; j++)
        {
            centerdot[ *curoffset++] -= intensity;
        }
    }
    current_intensity = 0;
}

void screendots::EraseStereoDots()
{
    unsigned char **the_dots = old_dot_addresses;

    const int right_disparity = current_disparity / 2;
    const int left_disparity  = right_disparity - current_disparity;

    const int limit = numdots;
    for( int i = 0; i < limit; i++)
    {
        (*the_dots)[ left_disparity]  += 1;
        (*the_dots)[ right_disparity] += 8;
        the_dots += 1;
    }
    current_disparity = 0;
}

void screendots::SetDots( const unsigned char diff)
{
    unsigned char **the_dots = dot_addresses;
    const int limit = numdots;

    for( int i = 0; i < limit; i++)
    {
        **the_dots++ += diff;
    }
    current_intensity = diff;
}

void screendots::SetMultiDots(
        const int *offsets, int numoffsets, const unsigned char diff)
{
    unsigned char **the_dots = dot_addresses;

    const int limit = numdots;
    for( int i = 0; i < limit; i++)
    {
        unsigned char *centerdot = *the_dots++;
        const int *curoffset = offsets;
        for( int j = 0; j < numoffsets; j++)
        {
            centerdot[ *curoffset++] += diff;
        }
    }
    current_intensity = diff;
}

void screendots::SetStereoDots( const char disparity)
{
    unsigned char **the_dots = dot_addresses;

    const int right_disparity = disparity / 2;
    const int left_disparity  = right_disparity - disparity;

    const int limit = numdots;
    for( int i = 0; i < limit; i++)
    {
        (*the_dots)[ left_disparity]  -= 1;
        (*the_dots)[ right_disparity] -= 8;
        the_dots += 1;
    }
    current_disparity = disparity;
}

void screendots::MoveDots( const unsigned char diff)
{
    unsigned char **old_dots = old_dot_addresses;
    unsigned char **new_dots = dot_addresses;
    const unsigned char intensity = current_intensity;
    const int limit = numdots;

    for( int i = 0; i < limit; i++)
    {
        **old_dots++ -= intensity;
        **new_dots++ += diff;
    }
    current_intensity = diff;
}

void screendots::MoveMultiDots(
        const int *offsets, int numoffsets, const unsigned char diff)
{
    unsigned char **old_dots = old_dot_addresses;
    unsigned char **new_dots = dot_addresses;
    const unsigned char intensity = current_intensity;
    const int limit = numdots;

    for( int i = 0; i < limit; i++)
    {
        unsigned char *old_centerdot = *old_dots;
        unsigned char *new_centerdot = *new_dots;

        for( int j = 0; j < numoffsets; j++)
        {
            const int curoffset = offsets[ j];
            old_centerdot[ curoffset] -= intensity;
            new_centerdot[ curoffset] += diff;
        }
        old_dots += 1;
        new_dots += 1;
    }
    current_intensity = diff;
}

void screendots::MoveStereoDots( const char disparity)
{
    unsigned char **old_dots = old_dot_addresses;
    unsigned char **new_dots = dot_addresses;

    const int old_right_disparity = current_disparity / 2;
    const int old_left_disparity  = old_right_disparity - current_disparity;

    const int new_right_disparity = disparity / 2;
    const int new_left_disparity  = new_right_disparity - disparity;

    const int limit = numdots;
    for( int i = 0; i < limit; i++)
    {
        (*old_dots)[ old_left_disparity]  += 1;
        (*old_dots)[ old_right_disparity] += 8;
        (*new_dots)[ new_left_disparity]  -= 1;
        (*new_dots)[ new_right_disparity] -= 8;
        old_dots += 1;
        new_dots += 1;
    }
    current_disparity = disparity;
}