getPaletteIndex()

uint8_t getPaletteIndex	(	uint32_t	millis32,
		int	width,
		int	max_width,
		int	height,
		int	max_height,
		uint32_t	y_speed )

Definition at line 75 of file FireCylinder.ino.

                                          {
    // get palette index
    uint16_t scale = scaleXY.as<uint16_t>();
    float xf = (float)width / (float)max_width;
    uint8_t x = (uint8_t)(xf * 255);
    uint32_t cosx = cos8(x);
    uint32_t sinx = sin8(x);
    float trig_scale = scale * scaleX.value();
    cosx *= trig_scale;
    sinx *= trig_scale;
    uint32_t y = height * scale + y_speed; // swapped: now using height
    uint16_t z = millis32 / invSpeedZ.as<uint16_t>();
 
    uint16_t noise16 = inoise16(cosx << 8, sinx << 8, y << 8, 0);
    uint8_t noise_val = noise16 >> 8;
    int8_t subtraction_factor = abs8(height - (max_height - 1)) * 255 /
                                (max_height - 1); // swapped: now using height
    return qsub8(noise_val, subtraction_factor);
}

References abs8(), cos8(), inoise16(), invSpeedZ, qsub8(), scale, scaleX, scaleXY, sin8, x, y, y_speed, and z.

Referenced by loop().

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