Add ToT WebGL conformance tests : part 9

conformance/ogles/GL/asin/asin_vec3_vert_xvary_ref.vert

Index: conformance/ogles/GL/asin/asin_vec3_vert_xvary_ref.vert
===================================================================
--- conformance/ogles/GL/asin/asin_vec3_vert_xvary_ref.vert	(revision 0)
+++ conformance/ogles/GL/asin/asin_vec3_vert_xvary_ref.vert	(working copy)
@@ -0,0 +1,86 @@
+
+/*
+** Copyright (c) 2012 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+
+attribute vec4 gtf_Vertex;
+attribute vec4 gtf_Color;
+uniform mat4 gtf_ModelViewProjectionMatrix;
+varying vec4 color;
+
+void main (void)
+{
+	const float M_PI = 3.14159265358979323846;
+	vec3 c = 2.0 * (gtf_Color.rgb - 0.5);
+	vec3 asin_c = vec3(0.0);
+	vec3 scale = vec3(1.0);
+	vec3 sign = vec3(1.0);
+
+	// pow can't handle negative numbers so take advantage of symmetry
+	if(c.r < 0.0)
+	{
+		sign.r = -1.0;
+		c.r *= -1.0;
+	}
+
+	// Taylors series expansion for asin
+	// 1000/2 iterations necessary to get the accuracy with this method
+	for(int i = 1; i < 1000; i += 2)
+	{
+		asin_c.r += scale.r * pow(c.r, float(i)) / float(i);
+		scale.r *= float(i) / float(i + 1);
+	}
+
+	// pow can't handle negative numbers so take advantage of symmetry
+	if(c.g < 0.0)
+	{
+		sign.g = -1.0;
+		c.g *= -1.0;
+	}
+
+	// Taylors series expansion for asin
+	// 1000/2 iterations necessary to get the accuracy with this method
+	for(int i = 1; i < 1000; i += 2)
+	{
+		asin_c.g += scale.g * pow(c.g, float(i)) / float(i);
+		scale.g *= float(i) / float(i + 1);
+	}
+
+	// pow can't handle negative numbers so take advantage of symmetry
+	if(c.b < 0.0)
+	{
+		sign.b = -1.0;
+		c.b *= -1.0;
+	}
+
+	// Taylors series expansion for asin
+	// 1000/2 iterations necessary to get the accuracy with this method
+	for(int i = 1; i < 1000; i += 2)
+	{
+		asin_c.b += scale.b * pow(c.b, float(i)) / float(i);
+		scale.b *= float(i) / float(i + 1);
+	}
+
+	color = vec4(sign * asin_c / M_PI + 0.5, 1.0);
+	gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex;
+}