Azmyth.Procedural.SimplexValueNoise.kernels C# (CSharp) Метод

        private double kernels(double dx, double dy,
		    byte h1, byte h2, byte h3, byte h4, byte h5, byte h6,
		    byte h7, byte h8, byte h9, byte h10, byte h11, byte h12)
        {
            double value = 0;
            double dxv, dyv, attn;

            dxv = dx + 1 + 2 * STRETCH_CONSTANT; dyv = dy + 1 + 2 * STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            if (attn > 0) {
                attn *= attn;
                value += attn * attn * h1;
            }

            dxv = dx + 0 + STRETCH_CONSTANT; dyv = dy + 1 + STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            // if (attn > 0) {
                attn *= attn;
                value += attn * attn * h2;
            // }

            dxv = dx - 1; dyv = dy + 1;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            if (attn > 0) {
                attn *= attn;
                value += attn * attn * h3;
            }

            dxv = dx + 1 + STRETCH_CONSTANT; dyv = dy + 0 + STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            if (attn > 0) {
                attn *= attn;
                value += attn * attn * h4;
            }

            dxv = dx + 0; dyv = dy + 0;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            // if (attn > 0) {
                attn *= attn;
                value += attn * attn * h5;
            // }

            dxv = dx - 1 - STRETCH_CONSTANT; dyv = dy + 0 - STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            // if (attn > 0) {
                attn *= attn;
                value += attn * attn * h6;
            // }

            dxv = dx - 2 - 2 * STRETCH_CONSTANT; dyv = dy + 0 - 2 * STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            if (attn > 0) {
                attn *= attn;
                value += attn * attn * h7;
            }

            dxv = dx + 0 - STRETCH_CONSTANT; dyv = dy - 1 - STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            // if (attn > 0) {
                attn *= attn;
                value += attn * attn * h8;
            // }

            dxv = dx - 1 - 2 * STRETCH_CONSTANT; dyv = dy - 1 - 2 * STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            // if (attn > 0) {
                attn *= attn;
                value += attn * attn * h9;
            // }

            dxv = dx - 2 - 3 * STRETCH_CONSTANT; dyv = dy - 1 - 3 * STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            // if (attn > 0) {
                attn *= attn;
                value += attn * attn * h10;
            // }

            dxv = dx - 1 - 3 * STRETCH_CONSTANT; dyv = dy - 2 - 3 * STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            if (attn > 0) {
                attn *= attn;
                value += attn * attn * h11;
            }

            dxv = dx - 2 - 4 * STRETCH_CONSTANT; dyv = dy - 2 - 4 * STRETCH_CONSTANT;
            attn = KERNEL_RADIUS - dxv * dxv - dyv * dyv;
            if (attn > 0) {
                attn *= attn;
                value += attn * attn * h12;
            }

            return value;
        }