more premake4 fun and tests

Demos/NativeClient/transforms.h

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+// Copyright (c) 2011 The Native Client Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef EXAMPLES_TUMBLER_TRANSFORMS_H_
+#define EXAMPLES_TUMBLER_TRANSFORMS_H_
+
+#include <GLES2/gl2.h>
+
+// A very simple set of 4x4 matrix routines.  In all these routines, the input
+// matrix is assumed to be a 4x4 of GLfloats.
+
+namespace transform_4x4 {
+
+// Pre-multply |m| with a projection transformation 4x4 matrix from a
+// truncated pyramid viewing frustum.
+void Frustum(GLfloat* m,
+             GLfloat left,
+             GLfloat right,
+             GLfloat bottom,
+             GLfloat top,
+             GLfloat near_z,
+             GLfloat far_z);
+
+// Replace |m| with the 4x4 identity matrix.
+void LoadIdentity(GLfloat* m);
+
+// |m| <- |a| . |b|.  |m| can point at the same memory as either |a| or |b|.
+void Multiply(GLfloat *m, GLfloat *a, GLfloat* b);
+
+// Pre-multiply |m| with a single-point perspective matrix based on the viewing
+// frustum whose view angle is |fovy|.
+void Perspective(GLfloat* m,
+                 GLfloat fovy,
+                 GLfloat aspect,
+                 GLfloat near_z,
+                 GLfloat far_z);
+
+// Pre-multiply |m| with a matrix that represents a translation by |tx|, |ty|,
+// |tz|.
+void Translate(GLfloat* m, GLfloat tx, GLfloat ty, GLfloat tz);
+}  // namespace transform_4x4
+
+#endif  // EXAMPLES_TUMBLER_TRANSFORMS_H_
+