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git-svn-id: svn://svn.icculus.org/netradiant/trunk@1 61c419a2-8eb2-4b30-bcec-8cead039b335
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rpolzer
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libs/pivot.h
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295
libs/pivot.h
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/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined(INCLUDED_PIVOT_H)
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#define INCLUDED_PIVOT_H
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#include "math/matrix.h"
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inline void billboard_viewplaneOriented(Matrix4& rotation, const Matrix4& world2screen)
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{
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#if 1
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rotation = g_matrix4_identity;
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Vector3 x(vector3_normalised(vector4_to_vector3(world2screen.x())));
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Vector3 y(vector3_normalised(vector4_to_vector3(world2screen.y())));
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Vector3 z(vector3_normalised(vector4_to_vector3(world2screen.z())));
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vector4_to_vector3(rotation.y()) = Vector3(x.y(), y.y(), z.y());
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vector4_to_vector3(rotation.z()) = vector3_negated(Vector3(x.z(), y.z(), z.z()));
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vector4_to_vector3(rotation.x()) = vector3_normalised(vector3_cross(vector4_to_vector3(rotation.y()), vector4_to_vector3(rotation.z())));
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vector4_to_vector3(rotation.y()) = vector3_cross(vector4_to_vector3(rotation.z()), vector4_to_vector3(rotation.x()));
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#else
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Matrix4 screen2world(matrix4_full_inverse(world2screen));
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Vector3 near_(
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vector4_projected(
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matrix4_transformed_vector4(
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screen2world,
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Vector4(0, 0, -1, 1)
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)
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)
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);
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Vector3 far_(
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vector4_projected(
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matrix4_transformed_vector4(
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screen2world,
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Vector4(0, 0, 1, 1)
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)
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)
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);
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Vector3 up(
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vector4_projected(
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matrix4_transformed_vector4(
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screen2world,
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Vector4(0, 1, -1, 1)
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)
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)
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);
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rotation = g_matrix4_identity;
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vector4_to_vector3(rotation.y()) = vector3_normalised(vector3_subtracted(up, near_));
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vector4_to_vector3(rotation.z()) = vector3_normalised(vector3_subtracted(near_, far_));
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vector4_to_vector3(rotation.x()) = vector3_normalised(vector3_cross(vector4_to_vector3(rotation.y()), vector4_to_vector3(rotation.z())));
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vector4_to_vector3(rotation.y()) = vector3_cross(vector4_to_vector3(rotation.z()), vector4_to_vector3(rotation.x()));
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#endif
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}
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inline void billboard_viewpointOriented(Matrix4& rotation, const Matrix4& world2screen)
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{
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Matrix4 screen2world(matrix4_full_inverse(world2screen));
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#if 1
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rotation = g_matrix4_identity;
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vector4_to_vector3(rotation.y()) = vector3_normalised(vector4_to_vector3(screen2world.y()));
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vector4_to_vector3(rotation.z()) = vector3_negated(vector3_normalised(vector4_to_vector3(screen2world.z())));
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vector4_to_vector3(rotation.x()) = vector3_normalised(vector3_cross(vector4_to_vector3(rotation.y()), vector4_to_vector3(rotation.z())));
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vector4_to_vector3(rotation.y()) = vector3_cross(vector4_to_vector3(rotation.z()), vector4_to_vector3(rotation.x()));
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#else
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Vector3 near_(
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vector4_projected(
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matrix4_transformed_vector4(
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screen2world,
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Vector4(world2screen[12] / world2screen[15], world2screen[13] / world2screen[15], -1, 1)
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)
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)
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);
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Vector3 far_(
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vector4_projected(
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matrix4_transformed_vector4(
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screen2world,
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Vector4(world2screen[12] / world2screen[15], world2screen[13] / world2screen[15], 1, 1)
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)
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)
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);
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Vector3 up(
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vector4_projected(
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matrix4_transformed_vector4(
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screen2world,
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Vector4(world2screen[12] / world2screen[15], world2screen[13] / world2screen[15] + 1, -1, 1)
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)
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)
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);
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rotation = g_matrix4_identity;
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vector4_to_vector3(rotation.y()) = vector3_normalised(vector3_subtracted(up, near_));
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vector4_to_vector3(rotation.z()) = vector3_normalised(vector3_subtracted(near_, far_));
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vector4_to_vector3(rotation.x()) = vector3_normalised(vector3_cross(vector4_to_vector3(rotation.y()), vector4_to_vector3(rotation.z())));
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vector4_to_vector3(rotation.y()) = vector3_cross(vector4_to_vector3(rotation.z()), vector4_to_vector3(rotation.x()));
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#endif
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}
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inline void ConstructObject2Screen(Matrix4& object2screen, const Matrix4& object2world, const Matrix4& world2view, const Matrix4& view2device, const Matrix4& device2screen)
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{
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object2screen = device2screen;
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matrix4_multiply_by_matrix4(object2screen, view2device);
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matrix4_multiply_by_matrix4(object2screen, world2view);
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matrix4_multiply_by_matrix4(object2screen, object2world);
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}
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inline void ConstructObject2Device(Matrix4& object2screen, const Matrix4& object2world, const Matrix4& world2view, const Matrix4& view2device)
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{
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object2screen = view2device;
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matrix4_multiply_by_matrix4(object2screen, world2view);
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matrix4_multiply_by_matrix4(object2screen, object2world);
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}
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inline void ConstructDevice2Object(Matrix4& device2object, const Matrix4& object2world, const Matrix4& world2view, const Matrix4& view2device)
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{
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ConstructObject2Device(device2object, object2world, world2view, view2device);
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matrix4_full_invert(device2object);
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}
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//! S = ( Inverse(Object2Screen *post ScaleOf(Object2Screen) ) *post Object2Screen
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inline void pivot_scale(Matrix4& scale, const Matrix4& pivot2screen)
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{
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Matrix4 pre_scale(g_matrix4_identity);
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pre_scale[0] = static_cast<float>(vector3_length(vector4_to_vector3(pivot2screen.x())));
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pre_scale[5] = static_cast<float>(vector3_length(vector4_to_vector3(pivot2screen.y())));
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pre_scale[10] = static_cast<float>(vector3_length(vector4_to_vector3(pivot2screen.z())));
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scale = pivot2screen;
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matrix4_multiply_by_matrix4(scale, pre_scale);
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matrix4_full_invert(scale);
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matrix4_multiply_by_matrix4(scale, pivot2screen);
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}
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// scale by (inverse) W
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inline void pivot_perspective(Matrix4& scale, const Matrix4& pivot2screen)
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{
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scale = g_matrix4_identity;
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scale[0] = scale[5] = scale[10] = pivot2screen[15];
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}
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inline void ConstructDevice2Manip(Matrix4& device2manip, const Matrix4& object2world, const Matrix4& world2view, const Matrix4& view2device, const Matrix4& device2screen)
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{
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Matrix4 pivot2screen;
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ConstructObject2Screen(pivot2screen, object2world, world2view, view2device, device2screen);
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ConstructObject2Device(device2manip, object2world, world2view, view2device);
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Matrix4 scale;
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pivot_scale(scale, pivot2screen);
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matrix4_multiply_by_matrix4(device2manip, scale);
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pivot_perspective(scale, pivot2screen);
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matrix4_multiply_by_matrix4(device2manip, scale);
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matrix4_full_invert(device2manip);
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}
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inline void Pivot2World_worldSpace(Matrix4& manip2world, const Matrix4& pivot2world, const Matrix4& modelview, const Matrix4& projection, const Matrix4& viewport)
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{
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manip2world = pivot2world;
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Matrix4 pivot2screen;
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ConstructObject2Screen(pivot2screen, pivot2world, modelview, projection, viewport);
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Matrix4 scale;
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pivot_scale(scale, pivot2screen);
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matrix4_multiply_by_matrix4(manip2world, scale);
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pivot_perspective(scale, pivot2screen);
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matrix4_multiply_by_matrix4(manip2world, scale);
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}
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inline void Pivot2World_viewpointSpace(Matrix4& manip2world, Vector3& axis, const Matrix4& pivot2world, const Matrix4& modelview, const Matrix4& projection, const Matrix4& viewport)
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{
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manip2world = pivot2world;
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Matrix4 pivot2screen;
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ConstructObject2Screen(pivot2screen, pivot2world, modelview, projection, viewport);
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Matrix4 scale;
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pivot_scale(scale, pivot2screen);
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matrix4_multiply_by_matrix4(manip2world, scale);
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billboard_viewpointOriented(scale, pivot2screen);
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axis = vector4_to_vector3(scale.z());
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matrix4_multiply_by_matrix4(manip2world, scale);
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pivot_perspective(scale, pivot2screen);
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matrix4_multiply_by_matrix4(manip2world, scale);
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}
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inline void Pivot2World_viewplaneSpace(Matrix4& manip2world, const Matrix4& pivot2world, const Matrix4& modelview, const Matrix4& projection, const Matrix4& viewport)
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{
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manip2world = pivot2world;
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Matrix4 pivot2screen;
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ConstructObject2Screen(pivot2screen, pivot2world, modelview, projection, viewport);
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Matrix4 scale;
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pivot_scale(scale, pivot2screen);
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matrix4_multiply_by_matrix4(manip2world, scale);
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billboard_viewplaneOriented(scale, pivot2screen);
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matrix4_multiply_by_matrix4(manip2world, scale);
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pivot_perspective(scale, pivot2screen);
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matrix4_multiply_by_matrix4(manip2world, scale);
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}
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#include "renderable.h"
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#include "cullable.h"
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#include "render.h"
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const Colour4b g_colour_x(255, 0, 0, 255);
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const Colour4b g_colour_y(0, 255, 0, 255);
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const Colour4b g_colour_z(0, 0, 255, 255);
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class Shader;
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class RenderablePivot : public OpenGLRenderable
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{
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VertexBuffer<PointVertex> m_vertices;
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public:
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mutable Matrix4 m_localToWorld;
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typedef Static<Shader*> StaticShader;
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static Shader* getShader()
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{
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return StaticShader::instance();
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}
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RenderablePivot()
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{
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m_vertices.reserve(6);
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m_vertices.push_back(PointVertex(Vertex3f(0, 0, 0), g_colour_x));
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m_vertices.push_back(PointVertex(Vertex3f(16, 0, 0), g_colour_x));
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m_vertices.push_back(PointVertex(Vertex3f(0, 0, 0), g_colour_y));
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m_vertices.push_back(PointVertex(Vertex3f(0, 16, 0), g_colour_y));
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m_vertices.push_back(PointVertex(Vertex3f(0, 0, 0), g_colour_z));
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m_vertices.push_back(PointVertex(Vertex3f(0, 0, 16), g_colour_z));
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}
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void render(RenderStateFlags state) const
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{
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if(m_vertices.size() == 0) return;
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if(m_vertices.data() == 0) return;
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glVertexPointer(3, GL_FLOAT, sizeof(PointVertex), &m_vertices.data()->vertex);
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glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(PointVertex), &m_vertices.data()->colour);
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glDrawArrays(GL_LINES, 0, m_vertices.size());
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}
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void render(Renderer& renderer, const VolumeTest& volume, const Matrix4& localToWorld) const
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{
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renderer.PushState();
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Pivot2World_worldSpace(m_localToWorld, localToWorld, volume.GetModelview(), volume.GetProjection(), volume.GetViewport());
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renderer.Highlight(Renderer::ePrimitive, false);
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renderer.SetState(getShader(), Renderer::eWireframeOnly);
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renderer.SetState(getShader(), Renderer::eFullMaterials);
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renderer.addRenderable(*this, m_localToWorld);
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renderer.PopState();
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}
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};
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#endif
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