Add ToT WebGL conformance tests : part 9

conformance/ogles/GL/sin/sin_vec2_vert_xvary_ref.vert

+
+/*
+** 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_Color;
+attribute vec4 gtf_Vertex;
+uniform mat4 gtf_ModelViewProjectionMatrix;
+varying vec4 color;
+
+float lerp(float a, float b, float s)
+{
+        return a + (b - a) * s;
+}
+
+void main (void)
+{
+        float sinValues[17];
+        sinValues[0] = 0.0;
+        sinValues[1] = 0.382683;
+        sinValues[2] = 0.707107;
+        sinValues[3] = 0.92388;
+        sinValues[4] = 1.0;
+        sinValues[5] = 0.92388;
+        sinValues[6] = 0.707107;
+        sinValues[7] = 0.382683;
+        sinValues[8] = 0.0;
+        sinValues[9] = -0.382683;
+        sinValues[10] = -0.707107;
+        sinValues[11] = -0.92388;
+        sinValues[12] = -1.0;
+        sinValues[13] = -0.923879;
+        sinValues[14] = -0.707107;
+        sinValues[15] = -0.382683;
+        sinValues[16] = 0.0;
+
+        const float M_PI = 3.14159265358979323846;
+        vec2 c = 2.0 * M_PI * gtf_Color.rg;
+        float sign = 1.0;
+
+        vec2 sin_c = vec2(0.0);
+        float fact;
+        float fact_of;
+
+        // Taylors series expansion for sin
+        for(int i = 0; i < 12; i++)
+        {
+                fact = 1.0;
+                for(int j = 2; j <= 23; j++)
+                        if (j <= 2 * i + 1)
+                                fact *= float(j);
+                        
+                sin_c += sign * pow(c, vec2(2.0 * float(i) + 1.0)) / fact;
+                sign *= -1.0;
+        }
+
+        color = vec4(0.5 * sin_c + 0.5, 0.0, 1.0);
+        gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex;
+}