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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef O3D_CORE_CROSS_TRANSFORMATION_CONTEXT_H_
#define O3D_CORE_CROSS_TRANSFORMATION_CONTEXT_H_
#include "core/cross/service_implementation.h"
#include "core/cross/math_types.h"
namespace o3d {
// Holds the current transformation state, including the world, view and
// projection matrices. TODO: it would be nice if this wasn't global state.
class TransformationContext {
public:
static const InterfaceId kInterfaceId;
explicit TransformationContext(ServiceLocator* service_locator)
: service_(service_locator, this) {}
// Retrieves the current world matrix.
const Matrix4& world() const {
return world_;
}
// Retrieves the current view matrix.
const Matrix4& view() const {
return view_;
}
// Retrieves the current projection matrix.
const Matrix4& projection() const {
return projection_;
}
// Retrieves the current view_projection matrix.
const Matrix4& view_projection() const {
return view_projection_;
}
// Retrieves the current world_view_projection matrix.
const Matrix4& world_view_projection() const {
return world_view_projection_;
}
// Sets the current world matrix.
void set_world(const Matrix4& world) {
world_ = world;
}
// Sets the current view matrix.
void set_view(const Matrix4& view) {
view_ = view;
}
// Sets the current projection matrix.
void set_projection(const Matrix4& projection) {
projection_ = projection;
}
// Sets the current view projection matrix.
void set_view_projection(const Matrix4& view_projection) {
view_projection_ = view_projection;
}
// Sets the current world view projection matrix.
void set_world_view_projection(const Matrix4& world_view_projection) {
world_view_projection_ = world_view_projection;
}
private:
ServiceImplementation<TransformationContext> service_;
// The following five matrices represent the transformation hierarchy during
// drawing of the scene. These are set in the draw code prior to rendering,
// so that StandardParamMatrix4s evaluate correctly.
// The current world matrix.
Matrix4 world_;
// The current view matrix.
Matrix4 view_;
// The current projection matrix.
Matrix4 projection_;
// The current view_projection matrix.
Matrix4 view_projection_;
// The current world_view_projection matrix.
Matrix4 world_view_projection_;
};
} // namespace o3d
#endif // O3D_CORE_CROSS_TRANSFORMATION_CONTEXT_H_
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