mirror of
https://github.com/recp/cglm.git
synced 2025-10-03 16:51:35 +00:00
impl but buggy
This commit is contained in:
Marcin
@@ -11,6 +11,9 @@
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#include "vec4.h"
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#include "vec4-ext.h"
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#include "vec2.h"
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#include "vec2-ext.h"
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// Based on glm::detail::mod289
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// template<typename T>
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// GLM_FUNC_QUALIFIER T mod289(T const& x)
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@@ -20,7 +23,7 @@
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CGLM_INLINE
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float
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_glm_detail_mod289(float x) {
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_glm_perlinDetail_mod289(float x) {
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return x - floorf(x * (1.0f / 289.0f)) * 289.0f;
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}
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@@ -32,11 +35,41 @@ _glm_detail_mod289(float x) {
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// }
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CGLM_INLINE
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void
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_glm_detail_permute(vec4 x, vec4 dest) {
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dest[0] = _glm_detail_mod289(x[0] * 34.0f + 1.0f) * x[0];
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dest[1] = _glm_detail_mod289(x[1] * 34.0f + 1.0f) * x[1];
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dest[2] = _glm_detail_mod289(x[2] * 34.0f + 1.0f) * x[2];
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dest[3] = _glm_detail_mod289(x[3] * 34.0f + 1.0f) * x[3];
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_glm_perlinDetail_permute(vec4 x, vec4 dest) {
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dest[0] = _glm_perlinDetail_mod289(x[0] * 34.0f + 1.0f) * x[0];
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dest[1] = _glm_perlinDetail_mod289(x[1] * 34.0f + 1.0f) * x[1];
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dest[2] = _glm_perlinDetail_mod289(x[2] * 34.0f + 1.0f) * x[2];
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dest[3] = _glm_perlinDetail_mod289(x[3] * 34.0f + 1.0f) * x[3];
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}
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// GLM_FUNC_QUALIFIER vec<4, T, Q> taylorInvSqrt(vec<4, T, Q> const& r)
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// {
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// return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
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// }
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CGLM_INLINE
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void
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_glm_perlinDetail_taylorInvSqrt(vec4 x, vec4 dest) {
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dest[0] = 1.79284291400159f - 0.85373472095314f * x[0];
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dest[1] = 1.79284291400159f - 0.85373472095314f * x[1];
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dest[2] = 1.79284291400159f - 0.85373472095314f * x[2];
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dest[3] = 1.79284291400159f - 0.85373472095314f * x[3];
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}
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// template<typename T, qualifier Q>
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// GLM_FUNC_QUALIFIER vec<4, T, Q> fade(vec<4, T, Q> const& t)
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// {
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// return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
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// }
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CGLM_INLINE
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void
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_glm_perlinDetail_fade(vec4 t, vec4 dest) {
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dest[0] = (t[0] * t[0] * t[0]) * (t[0] * (t[0] * 6.0f - 15.0f) + 10.0f);
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dest[1] = (t[1] * t[1] * t[1]) * (t[1] * (t[1] * 6.0f - 15.0f) + 10.0f);
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dest[2] = (t[2] * t[2] * t[2]) * (t[2] * (t[2] * 6.0f - 15.0f) + 10.0f);
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dest[3] = (t[3] * t[3] * t[3]) * (t[3] * (t[3] * 6.0f - 15.0f) + 10.0f);
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}
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/*!
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@@ -86,6 +119,104 @@ _glm_vec4_steps(vec4 edge, float x, vec4 dest) {
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dest[3] = glm_step(edge[3], x);
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}
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/*!
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* @brief set all elements of dest to value
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*
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* @param[in] vector threshold
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* @param[in] x value
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*/
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CGLM_INLINE
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void
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_glm_vec4_sets(vec4 v, float x) {
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v[0] = x;
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v[1] = x;
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v[2] = x;
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v[3] = x;
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}
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/*!
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* @brief mul v by a scalar, result is written to dest (dest = v * s)
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*
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* @param[in] v vector
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* @param[in] s scalar
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* @param[out] dest destination vector
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*/
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CGLM_INLINE
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void
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_glm_vec4_muls(vec4 x, float y, vec4 dest) {
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dest[0] = x[0] * y;
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dest[1] = x[1] * y;
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dest[2] = x[2] * y;
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dest[3] = x[3] * y;
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}
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CGLM_INLINE
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void
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_glm_perlinDetail_xy2g(
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vec4 ixy,
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/* out */
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vec4 gx,
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vec4 gy,
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vec4 gz,
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vec4 gw
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) {
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// gx = ixy / 7.0
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glm_vec4_divs(ixy, 7.0f, gx); // gx = ixy / 7.0
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// gy = fract(gx) / 7.0
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_glm_vec4_floor(gx, gy); // gy = floor(gx)
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glm_vec4_divs(gy, 7.0f, gy); // gy /= 7.0
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// gz = floor(gy) / 6.0
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_glm_vec4_floor(gy, gz); // gz = floor(gy)
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glm_vec4_divs(gz, 6.0f, gz); // gz /= 6.0
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// gx = fract(gx) - 0.5f
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glm_vec4_fract(gx, gx); // gx = fract(gx)
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glm_vec4_subs(gx, 0.5f, gx); // gx -= 0.5f
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// gy = fract(gy) - 0.5f
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glm_vec4_fract(gy, gy); // gy = fract(gy)
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glm_vec4_subs(gy, 0.5f, gy); // gy -= 0.5f
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// gz = fract(gz) - 0.5f
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glm_vec4_fract(gz, gz); // gz = fract(gz)
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glm_vec4_subs(gz, 0.5f, gz); // gz -= 0.5f
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// abs(gx), abs(gy), abs(gz)
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vec4 gxa = {0.0f};
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glm_vec4_abs(gx, gxa); // gxa = abs(gx)
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vec4 gya = {0.0f};
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glm_vec4_abs(gy, gya); // gya = abs(gy)
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vec4 gza = {0.0f};
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glm_vec4_abs(gz, gza); // gza = abs(gz)
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// gw = 0.75 - abs(gx) - abs(gy) - abs(gz)
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_glm_vec4_sets(gw, 0.75f); // gw = 0.75
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glm_vec4_sub(gw, gxa, gw); // gw -= gxa
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glm_vec4_sub(gw, gza, gw); // gw -= gza
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glm_vec4_sub(gw, gya, gw); // gw -= gya
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// sw = step(gw, 0.0);
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vec4 sw = {0.0f};
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_glm_vec4_steps(gw, 0.0f, sw); // sw = step(gw, 0.0)
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// gx -= sw * (step(vec4(0), gx) - T(0.5));
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vec4 temp = {0.0f}; // temp = 0.0
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glm_vec4_step(temp, gx, temp); // temp = step(temp, gx)
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glm_vec4_subs(temp, 0.5f, temp); // temp -= 0.5
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glm_vec4_mul(sw, temp, temp); // temp *= sw
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glm_vec4_sub(gx, temp, gx); // gx -= temp
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// gy -= sw * (step(vec4(0), gy) - T(0.5));
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glm_vec4_zero(temp); // reset temp
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glm_vec4_step(temp, gy, temp); // temp = step(temp, gy)
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glm_vec4_subs(temp, 0.5f, temp); // temp -= 0.5
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glm_vec4_mul(sw, temp, temp); // temp *= sw
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glm_vec4_sub(gy, temp, gy); // gy -= temp
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}
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/*!
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* @brief Classic perlin noise
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*
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@@ -123,113 +254,211 @@ glm_perlin(vec4 point) {
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// ixy = permute(permute(ix) + iy)
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vec4 ixy = {0.0f};
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_glm_detail_permute(ix, ixy); // ixy = permute(ix)
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_glm_perlinDetail_permute(ix, ixy); // ixy = permute(ix)
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glm_vec4_add(ixy, iy, ixy); // ixy += iy;
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_glm_detail_permute(ixy, ixy); // ixy = permute(ixy)
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_glm_perlinDetail_permute(ixy, ixy); // ixy = permute(ixy)
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// ixy0 = permute(ixy + iz0)
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vec4 ixy0 = {0.0f};
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glm_vec4_add(ixy, iz0, ixy0); // ixy0 = ixy + iz0
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_glm_detail_permute(ixy0, ixy0); // ixy0 = permute(ixy0)
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_glm_perlinDetail_permute(ixy0, ixy0); // ixy0 = permute(ixy0)
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// ixy1 = permute(ixy + iz1)
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vec4 ixy1 = {0.0f};
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glm_vec4_add(ixy, iz1, ixy1); // ixy1 = ixy, iz1
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_glm_detail_permute(ixy1, ixy1); // ixy1 = permute(ixy1)
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_glm_perlinDetail_permute(ixy1, ixy1); // ixy1 = permute(ixy1)
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// ixy00 = permute(ixy0 + iw0)
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vec4 ixy00 = {0.0f};
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glm_vec4_add(ixy0, iw0, ixy00); // ixy00 = ixy0 + iw0
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_glm_detail_permute(ixy00, ixy00); // ixy00 = permute(ixy00)
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_glm_perlinDetail_permute(ixy00, ixy00); // ixy00 = permute(ixy00)
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// ixy01 = permute(ixy0 + iw1)
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vec4 ixy01 = {0.0f};
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glm_vec4_add(ixy0, iw1, ixy01); // ixy01 = ixy0 + iw1
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_glm_detail_permute(ixy01, ixy01); // ixy01 = permute(ixy01)
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_glm_perlinDetail_permute(ixy01, ixy01); // ixy01 = permute(ixy01)
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// ixy10 = permute(ixy1 + iw0)
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vec4 ixy10 = {0.0f};
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glm_vec4_add(ixy1, iw0, ixy10); // ixy10 = ixy1 + iw0
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_glm_detail_permute(ixy10, ixy10); // ixy10 = permute(ixy10)
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_glm_perlinDetail_permute(ixy10, ixy10); // ixy10 = permute(ixy10)
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// ixy11 = permute(ixy1 + iw1)
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vec4 ixy11 = {0.0f};
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glm_vec4_add(ixy1, iw1, ixy11); // ixy11 = ixy1 + iw1
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_glm_detail_permute(ixy11, ixy11); // ixy11 = permute(ixy11)
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_glm_perlinDetail_permute(ixy11, ixy11); // ixy11 = permute(ixy11)
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// ------------
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// gx00 = ixy00 / 7.0
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vec4 gx00 = {0.0f};
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glm_vec4_divs(ixy00, 7.0f, gx00); // gx00 = ixy00 / 7.0
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// gy00 = fract(gx00) / 7.0
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vec4 gy00 = {0.0f};
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_glm_vec4_floor(gx00, gy00); // gy00 = floor(gx00)
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glm_vec4_divs(gy00, 7.0f, gy00); // gy00 /= 7.0
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// gz00 = floor(gy00) / 6.0
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vec4 gz00 = {0.0f};
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_glm_vec4_floor(gy00, gz00); // gz00 = floor(gy00)
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glm_vec4_divs(gz00, 6.0f, gz00); // gz00 /= 6.0
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vec4 gw00 = {0.0f};
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_glm_perlinDetail_xy2g(ixy00, gx00, gy00, gz00, gw00);
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// gx00 = fract(gx00) - 0.5f
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glm_vec4_fract(gx00, gx00); // gx00 = fract(gx00)
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glm_vec4_subs(gx00, 0.5f, gx00); // gx00 -= 0.5f
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vec4 gx01 = {0.0f};
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vec4 gy01 = {0.0f};
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vec4 gz01 = {0.0f};
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vec4 gw01 = {0.0f};
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_glm_perlinDetail_xy2g(ixy01, gx01, gy01, gz01, gw01);
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// gy00 = fract(gy00) - 0.5f
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glm_vec4_fract(gy00, gy00); // gy00 = fract(gy00)
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glm_vec4_subs(gy00, 0.5f, gy00); // gy00 -= 0.5f
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vec4 gx10 = {0.0f};
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vec4 gy10 = {0.0f};
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vec4 gz10 = {0.0f};
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vec4 gw10 = {0.0f};
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_glm_perlinDetail_xy2g(ixy10, gx10, gy10, gz10, gw10);
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// gz00 = fract(gz00) - 0.5f
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glm_vec4_fract(gz00, gz00); // gz00 = fract(gz00)
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glm_vec4_subs(gz00, 0.5f, gz00); // gz00 -= 0.5f
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// abs(gx00), abs(gy00), abs(gz00)
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vec4 gx00a = {0.0f};
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glm_vec4_abs(gx00, gx00a); // gx00a = abs(gx00)
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vec4 gy00a = {0.0f};
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glm_vec4_abs(gy00, gy00a); // gy00a = abs(gy00)
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vec4 gz00a = {0.0f};
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glm_vec4_abs(gz00, gz00a); // gz00a = abs(gz00)
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// gw00 = 0.75 - abs(gx00) - abs(gy00) - abs(gz00)
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vec4 gw00 = {0.75f}; // init to 0.75
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glm_vec4_sub(gw00, gx00a, gw00); // gw00 -= gx00a
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glm_vec4_sub(gw00, gz00a, gw00); // gw00 -= gz00a
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glm_vec4_sub(gw00, gy00a, gw00); // gw00 -= gy00a
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// sw00 = step(gw00, 0.0);
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vec4 sw00 = {0.0f};
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_glm_vec4_steps(gw00, 0.0f, sw00); // sw00 = step(gw00, 0.0)
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// gx00 -= sw00 * (step(vec4(0), gx00) - T(0.5));
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vec4 temp = {0.0f}; // temp = 0.0
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glm_vec4_step(temp, gx00, temp); // temp = step(temp, gx00)
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glm_vec4_subs(temp, 0.5f, temp); // temp -= 0.5
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glm_vec4_mul(sw00, temp, temp); // temp *= sw00
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glm_vec4_sub(gx00, temp, gx00); // gx00 -= temp
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// gy00 -= sw00 * (step(vec4(0), gy00) - T(0.5));
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glm_vec4_zero(temp); // reset temp
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glm_vec4_step(temp, gy00, temp); // temp = step(temp, gy00)
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glm_vec4_subs(temp, 0.5f, temp); // temp -= 0.5
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glm_vec4_mul(sw00, temp, temp); // temp *= sw00
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glm_vec4_sub(gy00, temp, gy00); // gy00 -= temp
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vec4 gx11 = {0.0f};
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vec4 gy11 = {0.0f};
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vec4 gz11 = {0.0f};
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vec4 gw11 = {0.0f};
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_glm_perlinDetail_xy2g(ixy11, gx11, gy11, gz11, gw11);
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// ------------
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// Work in progress...
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vec4 g0000 = {gx00[0], gy00[0], gz00[0], gw00[0]}; // g0000 = vec4(gx00.x, gy00.x, gz00.x, gw00.x);
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vec4 g1000 = {gx00[1], gy00[1], gz00[1], gw00[1]}; // g1000 = vec4(gx00.y, gy00.y, gz00.y, gw00.y);
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vec4 g0100 = {gx00[2], gy00[2], gz00[2], gw00[2]}; // g0100 = vec4(gx00.z, gy00.z, gz00.z, gw00.z);
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vec4 g1100 = {gx00[3], gy00[3], gz00[3], gw00[3]}; // g1100 = vec4(gx00.w, gy00.w, gz00.w, gw00.w);
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vec4 g0010 = {gx10[0], gy10[0], gz10[0], gw10[0]}; // g0010 = vec4(gx10.x, gy10.x, gz10.x, gw10.x);
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vec4 g1010 = {gx10[1], gy10[1], gz10[1], gw10[1]}; // g1010 = vec4(gx10.y, gy10.y, gz10.y, gw10.y);
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vec4 g0110 = {gx10[2], gy10[2], gz10[2], gw10[2]}; // g0110 = vec4(gx10.z, gy10.z, gz10.z, gw10.z);
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vec4 g1110 = {gx10[3], gy10[3], gz10[3], gw10[3]}; // g1110 = vec4(gx10.w, gy10.w, gz10.w, gw10.w);
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vec4 g0001 = {gx01[0], gy01[0], gz01[0], gw01[0]}; // g0001 = vec4(gx01.x, gy01.x, gz01.x, gw01.x);
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vec4 g1001 = {gx01[1], gy01[1], gz01[1], gw01[1]}; // g1001 = vec4(gx01.y, gy01.y, gz01.y, gw01.y);
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vec4 g0101 = {gx01[2], gy01[2], gz01[2], gw01[2]}; // g0101 = vec4(gx01.z, gy01.z, gz01.z, gw01.z);
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vec4 g1101 = {gx01[3], gy01[3], gz01[3], gw01[3]}; // g1101 = vec4(gx01.w, gy01.w, gz01.w, gw01.w);
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vec4 g0011 = {gx11[0], gy11[0], gz11[0], gw11[0]}; // g0011 = vec4(gx11.x, gy11.x, gz11.x, gw11.x);
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vec4 g1011 = {gx11[1], gy11[1], gz11[1], gw11[1]}; // g1011 = vec4(gx11.y, gy11.y, gz11.y, gw11.y);
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vec4 g0111 = {gx11[2], gy11[2], gz11[2], gw11[2]}; // g0111 = vec4(gx11.z, gy11.z, gz11.z, gw11.z);
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vec4 g1111 = {gx11[3], gy11[3], gz11[3], gw11[3]}; // g1111 = vec4(gx11.w, gy11.w, gz11.w, gw11.w);
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// norm00 = taylorInvSqrt(
|
||||
// vec4(
|
||||
// dot(g0000, g0000),
|
||||
// dot(g0100, g0100),
|
||||
// dot(g1000, g1000),
|
||||
// dot(g1100, g1100)
|
||||
// )
|
||||
// );
|
||||
|
||||
vec4 norm00 = {0.0f};
|
||||
norm00[0] = glm_vec4_dot(g0000, g0000); // norm00.x = dot(g0000, g0000)
|
||||
norm00[1] = glm_vec4_dot(g0100, g0100); // norm00.y = dot(g0100, g0100)
|
||||
norm00[2] = glm_vec4_dot(g1000, g1000); // norm00.z = dot(g1000, g1000)
|
||||
norm00[3] = glm_vec4_dot(g1100, g1100); // norm00.w = dot(g1100, g1100)
|
||||
_glm_perlinDetail_taylorInvSqrt(norm00, norm00); // norm00 = taylorInvSqrt(norm00)
|
||||
|
||||
_glm_vec4_muls(g0000, norm00[0], g0000); // g0000 *= norm00.x
|
||||
_glm_vec4_muls(g0100, norm00[1], g0100); // g0100 *= norm00.y
|
||||
_glm_vec4_muls(g1000, norm00[2], g1000); // g1000 *= norm00.z
|
||||
_glm_vec4_muls(g1100, norm00[3], g1100); // g1100 *= norm00.w
|
||||
|
||||
vec4 norm01 = {0.0f};
|
||||
norm01[0] = glm_vec4_dot(g0001, g0001); // norm01.x = dot(g0001, g0001)
|
||||
norm01[1] = glm_vec4_dot(g0101, g0101); // norm01.y = dot(g0101, g0101)
|
||||
norm01[2] = glm_vec4_dot(g1001, g1001); // norm01.z = dot(g1001, g1001)
|
||||
norm01[3] = glm_vec4_dot(g1101, g1101); // norm01.w = dot(g1101, g1101)
|
||||
_glm_perlinDetail_taylorInvSqrt(norm01, norm01); // norm01 = taylorInvSqrt(norm01)
|
||||
|
||||
_glm_vec4_muls(g0001, norm01[0], g0001); // g0001 *= norm01.x
|
||||
_glm_vec4_muls(g0101, norm01[1], g0101); // g0101 *= norm01.y
|
||||
_glm_vec4_muls(g1001, norm01[2], g1001); // g1001 *= norm01.z
|
||||
_glm_vec4_muls(g1101, norm01[3], g1101); // g1101 *= norm01.w
|
||||
|
||||
vec4 norm10 = {0.0f};
|
||||
norm10[0] = glm_vec4_dot(g0010, g0010); // norm10.x = dot(g0010, g0010)
|
||||
norm10[1] = glm_vec4_dot(g0110, g0110); // norm10.y = dot(g0110, g0110)
|
||||
norm10[2] = glm_vec4_dot(g1010, g1010); // norm10.z = dot(g1010, g1010)
|
||||
norm10[3] = glm_vec4_dot(g1110, g1110); // norm10.w = dot(g1110, g1110)
|
||||
_glm_perlinDetail_taylorInvSqrt(norm10, norm10); // norm10 = taylorInvSqrt(norm10)
|
||||
|
||||
_glm_vec4_muls(g0010, norm10[0], g0010); // g0010 *= norm10.x
|
||||
_glm_vec4_muls(g0110, norm10[1], g0110); // g0110 *= norm10.y
|
||||
_glm_vec4_muls(g1010, norm10[2], g1010); // g1010 *= norm10.z
|
||||
_glm_vec4_muls(g1110, norm10[3], g1110); // g1110 *= norm10.w
|
||||
|
||||
return point[0] + point[1] + point[2] + point[3];
|
||||
vec4 norm11 = {0.0f};
|
||||
norm11[0] = glm_vec4_dot(g0011, g0011); // norm11.x = dot(g0011, g0011)
|
||||
norm11[1] = glm_vec4_dot(g0111, g0111); // norm11.y = dot(g0111, g0111)
|
||||
norm11[2] = glm_vec4_dot(g1011, g1011); // norm11.z = dot(g1011, g1011)
|
||||
norm11[3] = glm_vec4_dot(g1111, g1111); // norm11.w = dot(g1111, g1111)
|
||||
_glm_perlinDetail_taylorInvSqrt(norm11, norm11); // norm11 = taylorInvSqrt(norm11)
|
||||
|
||||
_glm_vec4_muls(g0011, norm11[0], g0011); // g0011 *= norm11.x
|
||||
_glm_vec4_muls(g0111, norm11[1], g0111); // g0111 *= norm11.y
|
||||
_glm_vec4_muls(g1011, norm11[2], g1011); // g1011 *= norm11.z
|
||||
_glm_vec4_muls(g1111, norm11[3], g1111); // g1111 *= norm11.w
|
||||
|
||||
// ------------
|
||||
|
||||
float n0000 = glm_vec4_dot(g0000, Pf0); // n0000 = dot(g0000, Pf0)
|
||||
|
||||
vec4 n1000d = {Pf1[0], Pf0[1], Pf0[2], Pf0[3]};
|
||||
float n1000 = glm_vec4_dot(g1000, n1000d); // n1000 = dot(g1000, vec4(Pf1.x, Pf0.y, Pf0.z, Pf0.w))
|
||||
vec4 n0100d = {Pf0[0], Pf1[1], Pf0[2], Pf0[3]};
|
||||
float n0100 = glm_vec4_dot(g0100, n0100d); // n0100 = dot(g0100, vec4(Pf0.x, Pf1.y, Pf0.z, Pf0.w))
|
||||
vec4 n1100d = {Pf1[0], Pf1[1], Pf0[2], Pf0[3]};
|
||||
float n1100 = glm_vec4_dot(g1100, n1100d); // n1100 = dot(g1100, vec4(Pf1.x, Pf1.y, Pf0.z, Pf0.w))
|
||||
vec4 n0010d = {Pf0[0], Pf0[1], Pf1[2], Pf0[3]};
|
||||
float n0010 = glm_vec4_dot(g0010, n0010d); // n0010 = dot(g0010, vec4(Pf0.x, Pf0.y, Pf1.z, Pf0.w))
|
||||
vec4 n1010d = {Pf1[0], Pf0[1], Pf1[2], Pf0[3]};
|
||||
float n1010 = glm_vec4_dot(g1010, n1010d); // n1010 = dot(g1010, vec4(Pf1.x, Pf0.y, Pf1.z, Pf0.w))
|
||||
vec4 n0110d = {Pf0[0], Pf1[1], Pf1[2], Pf0[3]};
|
||||
float n0110 = glm_vec4_dot(g0110, n0110d); // n0110 = dot(g0110, vec4(Pf0.x, Pf1.y, Pf1.z, Pf0.w))
|
||||
vec4 n1110d = {Pf1[0], Pf1[1], Pf1[2], Pf0[3]};
|
||||
float n1110 = glm_vec4_dot(g1110, n1110d); // n1110 = dot(g1110, vec4(Pf1.x, Pf1.y, Pf1.z, Pf0.w))
|
||||
vec4 n0001d = {Pf0[0], Pf0[1], Pf0[2], Pf1[3]};
|
||||
float n0001 = glm_vec4_dot(g0001, n0001d); // n0001 = dot(g0001, vec4(Pf0.x, Pf0.y, Pf0.z, Pf1.w))
|
||||
vec4 n1001d = {Pf1[0], Pf0[1], Pf0[2], Pf1[3]};
|
||||
float n1001 = glm_vec4_dot(g1001, n1001d); // n1001 = dot(g1001, vec4(Pf1.x, Pf0.y, Pf0.z, Pf1.w))
|
||||
vec4 n0101d = {Pf0[0], Pf1[1], Pf0[2], Pf1[3]};
|
||||
float n0101 = glm_vec4_dot(g0101, n0101d); // n0101 = dot(g0101, vec4(Pf0.x, Pf1.y, Pf0.z, Pf1.w))
|
||||
vec4 n1101d = {Pf1[0], Pf1[1], Pf0[2], Pf1[3]};
|
||||
float n1101 = glm_vec4_dot(g1101, n1101d); // n1101 = dot(g1101, vec4(Pf1.x, Pf1.y, Pf0.z, Pf1.w))
|
||||
vec4 n0011d = {Pf0[0], Pf0[1], Pf1[2], Pf1[3]};
|
||||
float n0011 = glm_vec4_dot(g0011, n0011d); // n0011 = dot(g0011, vec4(Pf0.x, Pf0.y, Pf1.z, Pf1.w))
|
||||
vec4 n1011d = {Pf1[0], Pf0[1], Pf1[2], Pf1[3]};
|
||||
float n1011 = glm_vec4_dot(g1011, n1011d); // n1011 = dot(g1011, vec4(Pf1.x, Pf0.y, Pf1.z, Pf1.w))
|
||||
vec4 n0111d = {Pf0[0], Pf1[1], Pf1[2], Pf1[3]};
|
||||
float n0111 = glm_vec4_dot(g0111, n0111d); // n0111 = dot(g0111, vec4(Pf0.x, Pf1.y, Pf1.z, Pf1.w))
|
||||
|
||||
float n1111 = glm_vec4_dot(g1111, Pf1); // n1111 = dot(g1111, Pf1)
|
||||
|
||||
// ------------
|
||||
|
||||
// fade_xyzw = detail::fade(Pf0);
|
||||
// n_0w = lerp(
|
||||
// vec4(n0000, n1000, n0100, n1100),
|
||||
// vec4(n0001, n1001, n0101, n1101),
|
||||
// fade_xyzw.w,
|
||||
// );
|
||||
|
||||
vec4 fade_xyzw = {0.0f};
|
||||
_glm_perlinDetail_fade(Pf0, fade_xyzw); // fade_xyzw = fade(Pf0)
|
||||
|
||||
vec4 n_0w1 = {n0000, n1000, n0100, n1100};
|
||||
vec4 n_0w2 = {n0001, n1001, n0101, n1101};
|
||||
vec4 n_0w = {0.0f};
|
||||
glm_vec4_lerp(n_0w1, n_0w2, fade_xyzw[3], n_0w); // n_0w = lerp(vec4(n0000, n1000, n0100, n1100), vec4(n0001, n1001, n0101, n1101), fade_xyzw.w)
|
||||
|
||||
vec4 n_1w1 = {n0010, n1010, n0110, n1110};
|
||||
vec4 n_1w2 = {n0011, n1011, n0111, n1111};
|
||||
vec4 n_1w = {0.0f};
|
||||
glm_vec4_lerp(n_1w1, n_1w2, fade_xyzw[3], n_1w); // n_1w = lerp(vec4(n0010, n1010, n0110, n1110), vec4(n0011, n1011, n0111, n1111), fade_xyzw.w)
|
||||
|
||||
vec4 n_zw = {0.0f};
|
||||
glm_vec4_lerp(n_0w, n_1w, fade_xyzw[2], n_zw); // n_zw = lerp(n_0w, n_1w, fade_xyzw.z)
|
||||
|
||||
vec2 n_yzw = {0.0f};
|
||||
vec2 n_yzw1 = {n_zw[0], n_zw[1]};
|
||||
vec2 n_yzw2 = {n_zw[2], n_zw[3]};
|
||||
glm_vec2_lerp(n_yzw1, n_yzw2, fade_xyzw[1], n_yzw); // n_yzw = lerp(vec2(n_zw.x, n_zw.y), vec2(n_zw.z, n_zw.w), fade_xyzw.y)
|
||||
|
||||
float n_xyzw = glm_lerp(n_yzw[0], n_yzw[1], fade_xyzw[0]); // n_xyzw = lerp(n_yzw.x, n_yzw.y, fade_xyzw.x)
|
||||
|
||||
return n_xyzw * 2.2f;
|
||||
}
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user