78 lines
2.4 KiB
Rust
78 lines
2.4 KiB
Rust
use glsl::parser::Parse;
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use glsl::syntax::ShaderStage;
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use super::CodePiece;
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use glsl::syntax::TranslationUnit;
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use glsl::transpiler::glsl::show_translation_unit;
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use crate::impl_code_piece;
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pub struct Constants {
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pub raw: ShaderStage,
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}
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impl Constants {
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pub fn new() -> Constants {
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let raw = {
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"
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#ifndef _GLUMPY__CONSTANTS__
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#define _GLUMPY__CONSTANTS__
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// The base of natural logarithms (e)
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const float M_E = 2.71828182845904523536028747135266250;
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// The logarithm to base 2 of M_E (log2(e))
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const float M_LOG2E = 1.44269504088896340735992468100189214;
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// The logarithm to base 10 of M_E (log10(e))
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const float M_LOG10E = 0.434294481903251827651128918916605082;
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// The natural logarithm of 2 (loge(2))
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const float M_LN2 = 0.693147180559945309417232121458176568;
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// The natural logarithm of 10 (loge(10))
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const float M_LN10 = 2.30258509299404568401799145468436421;
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// Pi, the ratio of a circle's circumference to its diameter.
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const float M_PI = 3.14159265358979323846264338327950288;
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// Pi divided by two (pi/2)
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const float M_PI_2 = 1.57079632679489661923132169163975144;
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// Pi divided by four (pi/4)
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const float M_PI_4 = 0.785398163397448309615660845819875721;
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// The reciprocal of pi (1/pi)
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const float M_1_PI = 0.318309886183790671537767526745028724;
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// Two times the reciprocal of pi (2/pi)
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const float M_2_PI = 0.636619772367581343075535053490057448;
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// Two times the reciprocal of the square root of pi (2/sqrt(pi))
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const float M_2_SQRTPI = 1.12837916709551257389615890312154517;
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// The square root of two (sqrt(2))
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const float M_SQRT2 = 1.41421356237309504880168872420969808;
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// The reciprocal of the square root of two (1/sqrt(2))
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const float M_SQRT1_2 = 0.707106781186547524400844362104849039;
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// 1 degree in radians
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const float degree = 180.0/M_PI;
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// 1 radian in degrees
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const float radian = M_PI/180.0;
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#endif
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"
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};
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let raw = ShaderStage::parse(raw).unwrap();
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Constants { raw }
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}
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}
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impl_code_piece!(Constants, raw);
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