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@ -4,7 +4,6 @@ |
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#include "../pixel.h" |
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#include "../pixel.h" |
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#include "../util.h" |
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#include "../util.h" |
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#include "fpmath_patterns.h" |
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#include "fpmath_patterns.h" |
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#include <inttypes.h> |
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#define DOUBLE_BUFFERING |
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#define DOUBLE_BUFFERING |
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#ifdef DOUBLE_BUFFERING |
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#ifdef DOUBLE_BUFFERING |
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@ -92,63 +91,6 @@ static void fpmath_pattern(double const t_start, |
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#ifdef ANIMATION_PLASMA |
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#ifdef ANIMATION_PLASMA |
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#define PLASMA_X (1.0 / (NUM_COLS / (2.0 * M_PI))) |
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#define PLASMA_X (1.0 / (NUM_COLS / (2.0 * M_PI))) |
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#define INTEGERFUN 1 |
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#ifdef INTEGERFUN |
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//XXX this is inefficient, as we could as this is a 2*PI sine and we'd really need only half of it - hansi
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const uint8_t sine_table[32] = |
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{ |
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128,152,176,198,218,234,245,253,255,253,245,234,218,198,176,152, |
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128,103,79,57,37,21,10,2,0,2,10,21,37,57,79,103 |
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}; |
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uint8_t sin_i(uint8_t phase) |
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{ |
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return sine_table[phase >> 3]; |
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} |
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#define SQRT0x8000 181 |
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#define SQRT25x3 0x45483 |
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void plasma(void) |
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{ |
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uint8_t sqx, x, y, scale = 3, off = 0; |
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#ifdef DOUBLE_BUFFERING |
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// double buffering to reduce half painted pictures
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unsigned char pixmap_buffer[NUMPLANE][NUM_ROWS][LINEBYTES]; |
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#endif |
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while (off < 200) |
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{ |
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for(x = 0; x < NUM_COLS; x++) |
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{ |
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sqx = x*x; |
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for(y = 0; y < NUM_ROWS; y++) |
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{ |
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unsigned char const mask = shl_table[y % 8U]; |
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unsigned char const color = (uint16_t)sin_i(sqrt((uint16_t)sqx + ((uint16_t)y*(uint16_t)y)) * (255*255 / ((scale * NUM_COLS) / 2)) + off) * (NUMPLANE - 1) / 255 ; |
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unsigned char const x_8 = x / 8u; |
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for (unsigned char p = 0; p < NUMPLANE; ++p) |
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{ |
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if (p <= (color - 1)) |
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{ |
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BUFFER[p][y][x_8] |= mask; |
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} |
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else |
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{ |
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BUFFER[p][y][x_8] &= ~mask; |
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} |
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} |
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} |
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} |
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#ifdef DOUBLE_BUFFERING |
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memcpy(pixmap, pixmap_buffer, sizeof(pixmap)); |
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#endif |
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} |
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} |
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#else |
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/**
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/**
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* Draws a simple plasma like pattern. |
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* Draws a simple plasma like pattern. |
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*/ |
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*/ |
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@ -181,8 +123,6 @@ void plasma(void) |
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} |
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} |
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#endif |
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#endif |
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#endif /* INTEGERFUN */ |
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#ifdef ANIMATION_PSYCHEDELIC |
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#ifdef ANIMATION_PSYCHEDELIC |
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/**
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/**
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