// Copyright (c) 2000, 2001, 2002, 2003 by David Scherer and others.

// Copyright (c) 2003, 2004 by Jonathan Brandmeyer and others.

// See the file license.txt for complete license terms.

// See the file authors.txt for a complete list of contributors.

#include "box.hpp"

#include "util/errors.hpp"

#include "util/gl_enable.hpp"

namespace cvisual {

displaylist box::model;

void

box::init_model( displaylist& model, bool skip_right_face ) {

// Note that this model is also used by arrow!

model.gl_compile_begin();

glEnable(GL_CULL_FACE);

glBegin( GL_QUADS );

const float s = 0.5;

float vertices[6][4][3] = {

{{ +s, +s, +s }, { +s, -s, +s }, { +s, -s, -s }, { +s, +s, -s }}, // Right face

{{ -s, +s, -s }, { -s, -s, -s }, { -s, -s, +s }, { -s, +s, +s }}, // Left face

{{ -s, -s, +s }, { -s, -s, -s }, { +s, -s, -s }, { +s, -s, +s }}, // Bottom face

{{ -s, +s, -s }, { -s, +s, +s }, { +s, +s, +s }, { +s, +s, -s }}, // Top face

{{ +s, +s, +s }, { -s, +s, +s }, { -s, -s, +s }, { +s, -s, +s }}, // Front face

{{ -s, -s, -s }, { -s, +s, -s }, { +s, +s, -s }, { +s, -s, -s }} // Back face

};

float normals[6][3] = {

{ +1, 0, 0 }, { -1, 0, 0 }, { 0, -1, 0 }, { 0, +1, 0 }, { 0, 0, +1 }, { 0, 0, -1 }

};

// Draw inside (reverse winding and normals)

for(int f=skip_right_face; f<6; f++) {

glNormal3f( -normals[f][0], -normals[f][1], -normals[f][2] );

for(int v=0; v<4; v++)

glVertex3fv( vertices[f][3-v] );

}

// Draw outside

for(int f=skip_right_face; f<6; f++) {

glNormal3fv( normals[f] );

for(int v=0; v<4; v++)

glVertex3fv( vertices[f][v] );

}

glEnd();

glDisable(GL_CULL_FACE);

model.gl_compile_end();

check_gl_error();

}

void

box::gl_pick_render( const view& scene)

{

gl_render(scene);

}

void

box::gl_render( const view& scene)

{

if (!model) init_model(model, false);

color.gl_set(opacity);

gl_matrix_stackguard guard;

apply_transform( scene );

model.gl_render();

check_gl_error();

}

void

box::grow_extent( extent& e)

{

tmatrix tm = model_world_transform( 1.0, vector( axis.mag(), height, width ) * 0.5 );

e.add_box( tm, vector(-1,-1,-1), vector(1,1,1) );

e.add_body();

}

void

box::get_material_matrix(const view&, tmatrix& out) {

out.translate( vector(.5,.5,.5) );

vector scale( axis.mag(), height, width );

out.scale( scale * (1.0 / std::max(scale.x, std::max(scale.y, scale.z))) );

}

PRIMITIVE_TYPEINFO_IMPL(box)

} // !namespace cvisual