389 lines
9.4 KiB
C++
389 lines
9.4 KiB
C++
/****************************************************************************
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GLUI User Interface Toolkit
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---------------------------
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glui_rotation - GLUI_Rotation control class
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--------------------------------------------------
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Copyright (c) 1998 Paul Rademacher
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This program is freely distributable without licensing fees and is
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provided without guarantee or warrantee expressed or implied. This
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program is -not- in the public domain.
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*****************************************************************************/
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#include "glui.h"
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#include "arcball.h"
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#include "algebra3.h"
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/*************************** GLUI_Rotation::iaction_mouse_down_handler() ***/
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int GLUI_Rotation::iaction_mouse_down_handler( int local_x, int local_y )
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{
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copy_float_array_to_ball();
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init_ball();
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local_y = (int) floor(2.0 * ball->center[1] - local_y);
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ball->mouse_down( local_x, local_y );
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/* printf( "%d %d - %f %f\n", local_x, local_y, ball->center[0], ball->center[1] ); */
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copy_ball_to_float_array();
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spinning = false;
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return false;
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}
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/*********************** GLUI_Rotation::iaction_mouse_up_handler() **********/
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int GLUI_Rotation::iaction_mouse_up_handler( int local_x, int local_y,
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int inside )
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{
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copy_float_array_to_ball();
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ball->mouse_up();
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return false;
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}
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/******************* GLUI_Rotation::iaction_mouse_held_down_handler() ******/
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int GLUI_Rotation::iaction_mouse_held_down_handler( int local_x, int local_y,
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int inside)
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{
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if ( NOT glui )
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return 0;
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copy_float_array_to_ball();
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local_y = (int) floor(2.0 * ball->center[1] - local_y);
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/* printf( "%d %d\n", local_x, local_y ); */
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ball->mouse_motion( local_x, local_y, 0,
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(glui->curr_modifiers & GLUT_ACTIVE_ALT) != 0,
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(glui->curr_modifiers & GLUT_ACTIVE_CTRL) != 0 );
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copy_ball_to_float_array();
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if ( can_spin )
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spinning = true;
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return false;
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}
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/******************** GLUI_Rotation::iaction_draw_active_area_persp() **************/
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void GLUI_Rotation::iaction_draw_active_area_persp( void )
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{
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if ( NOT can_draw() )
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return;
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copy_float_array_to_ball();
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setup_texture();
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setup_lights();
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glEnable(GL_CULL_FACE );
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glMatrixMode( GL_MODELVIEW );
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glPushMatrix();
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mat4 tmp_rot = *ball->rot_ptr;
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glMultMatrixf( (float*) &tmp_rot[0][0] );
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/*** Draw the checkered box ***/
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/*glDisable( GL_TEXTURE_2D ); */
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draw_ball( 1.96 );
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glPopMatrix();
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glDisable( GL_TEXTURE_2D );
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glDisable( GL_LIGHTING );
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glDisable( GL_CULL_FACE );
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}
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/******************** GLUI_Rotation::iaction_draw_active_area_ortho() **********/
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void GLUI_Rotation::iaction_draw_active_area_ortho( void )
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{
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if ( NOT can_draw() )
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return;
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/********* Draw emboss circles around arcball control *********/
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int k;
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float radius;
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radius = (float)(h-22)/2.0; /*MIN((float)w/2.0, (float)h/2.0); */
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glLineWidth( 1.0 );
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glBegin( GL_LINE_LOOP);
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for( k=0; k<60; k++ ) {
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float phi = 2*M_PI*(float)k/60.0;
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vec2 p( cos(phi) * (2.0 + radius), sin(phi) * (2.0 + radius));
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if ( p[1] < -p[0] ) glColor3ub( 128,128,128 );
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else glColor3ub( 255,255,255 );
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glVertex2fv((float*)&p[0]);
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}
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glEnd();
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glBegin( GL_LINE_LOOP);
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for( k=0; k<60; k++ ) {
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float phi = 2*M_PI*(float)k/60.0;
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vec2 p( cos(phi) * (1.0 + radius), sin(phi) * (1.0 + radius));
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if ( enabled ) {
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if ( p[1] < -p[0] ) glColor3ub( 0,0,0);
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else glColor3ub( 192,192,192);
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}
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else
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{
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if ( p[1] < -p[0] ) glColor3ub( 180,180,180);
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else glColor3ub( 192,192,192);
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}
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glVertex2fv((float*)&p[0]);
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}
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glEnd();
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}
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/******************************** GLUI_Rotation::iaction_dump() **********/
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void GLUI_Rotation::iaction_dump( FILE *output )
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{
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}
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/******************** GLUI_Rotation::iaction_special_handler() **********/
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int GLUI_Rotation::iaction_special_handler( int key,int modifiers )
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{
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return false;
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}
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/********************************** GLUI_Rotation::init_ball() **********/
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void GLUI_Rotation::init_ball( void )
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{
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/*printf( "%f %f %f", float( MIN(w/2,h/2)), (float) w/2, (float) h/2 ); */
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ball->set_params( vec2( (float)(w/2), (float)((h-18)/2)),
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(float) 2.0*(h-18) );
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/*ball->set_damping( .05 ); */
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/*float( MIN(w/2,h/2))*2.0 ); */
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/* ball->reset_mouse(); */
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}
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/****************************** GLUI_Rotation::setup_texture() *********/
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void GLUI_Rotation::setup_texture( void )
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{
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int i, j;
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int dark, light; /*** Dark and light colors for ball checkerboard ***/
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#define CHECKBOARD_SIZE 64
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unsigned char texture_image[CHECKBOARD_SIZE] [CHECKBOARD_SIZE] [3];
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unsigned char c;
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for( i=0; i<CHECKBOARD_SIZE; i++ ) {
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for( j=0; j<CHECKBOARD_SIZE; j++ ) {
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if ( enabled ) {
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dark = 110;
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light = 220;
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}
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else {
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dark = glui->bkgd_color.r - 30;
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light = glui->bkgd_color.r;
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}
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c = (( (((i&0x8)==0) ^ ((j&0x8))) == 0 )) * light;
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if ( c == 0 )
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c = dark;
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texture_image[i][j][0] = c;
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texture_image[i][j][1] = c;
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texture_image[i][j][2] = c;
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}
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}
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glColor3f( 1.0, 1.0, 1.0 );
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glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
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glEnable( GL_TEXTURE_2D);
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glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
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glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, CHECKBOARD_SIZE,
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CHECKBOARD_SIZE, 0, GL_RGB, GL_UNSIGNED_BYTE,
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texture_image );
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}
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/****************************** GLUI_Rotation::setup_lights() ***********/
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void GLUI_Rotation::setup_lights( void )
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{
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glEnable( GL_LIGHTING );
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/* if ( enabled )
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glEnable( GL_LIGHTING );
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else
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glDisable( GL_LIGHTING );*/
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glEnable(GL_LIGHT0);
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glColorMaterial(GL_AMBIENT_AND_DIFFUSE, GL_FRONT_AND_BACK );
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glEnable(GL_COLOR_MATERIAL);
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GLfloat light0_ambient[] = {0.2f, 0.2f, 0.2f, 1.0f};
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GLfloat light0_diffuse[] = {1.f, 1.f, 1.0f, 1.0f};
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GLfloat light0_position[] = {-1.f, 1.f, 1.0f, 0.0f};
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glLightfv(GL_LIGHT0, GL_AMBIENT, light0_ambient);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_diffuse);
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glLightfv(GL_LIGHT0, GL_POSITION, light0_position);
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}
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/****************************** GLUI_Rotation::draw_ball() **************/
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void GLUI_Rotation::draw_ball( float radius )
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{
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if ( NOT can_draw() )
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return;
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if (quadObj == NULL) quadObj = gluNewQuadric();
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if (quadObj) {
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gluQuadricDrawStyle(quadObj, GLU_FILL);
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gluQuadricNormals(quadObj, GLU_SMOOTH);
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gluQuadricTexture(quadObj, true );
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gluSphere(quadObj, radius, 16, 16);
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}
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}
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/****************************** GLUI_Rotation::reset() **********/
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void GLUI_Rotation::reset( void )
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{
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ball->init(); /** reset quaternion, etc. **/
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ball->set_params( vec2( (float)(w/2), (float)((h-18)/2)),
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(float) 2.0*(h-18) );
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set_spin( this->damping );
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copy_ball_to_float_array();
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translate_and_draw_front();
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output_live(true); /*** Output live and draw main grx window ***/
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}
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/****************************** GLUI_Rotation::needs_idle() *********/
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int GLUI_Rotation::needs_idle( void )
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{
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return can_spin;
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}
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/****************************** GLUI_Rotation::idle() ***************/
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void GLUI_Rotation::idle( void )
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{
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spinning = ball->is_spinning;
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if ( can_spin == true AND spinning == true ) {
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copy_float_array_to_ball();
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ball->idle();
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*ball->rot_ptr = *ball->rot_ptr * ball->rot_increment;
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mat4 tmp_rot;
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tmp_rot = *ball->rot_ptr;
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copy_ball_to_float_array();
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draw_active_area_only = true;
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translate_and_draw_front();
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draw_active_area_only = false;
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output_live(true); /** output live and update gfx **/
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}
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else {
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}
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}
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/********************** GLUI_Rotation::copy_float_array_to_ball() *********/
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void GLUI_Rotation::copy_float_array_to_ball( void )
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{
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int i;
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float *fp_src, *fp_dst;
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fp_src = &float_array_val[0];
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fp_dst = &((*ball->rot_ptr)[0][0]);
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for( i=0; i<16; i++ ) {
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*fp_dst = *fp_src;
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fp_src++;
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fp_dst++;
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}
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}
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/********************** GLUI_Rotation::copy_ball_to_float_array() *********/
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void GLUI_Rotation::copy_ball_to_float_array( void )
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{
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mat4 tmp_rot;
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tmp_rot = *ball->rot_ptr;
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set_float_array_val( (float*) &tmp_rot[0][0] );
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}
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/************************ GLUI_Rotation::set_spin() **********************/
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void GLUI_Rotation::set_spin( float damp_factor )
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{
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if ( damp_factor == 0.0 )
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can_spin = false;
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else
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can_spin = true;
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ball->set_damping( 1.0 - damp_factor );
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this->damping = damp_factor;
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}
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/************** GLUI_Rotation::GLUI_Rotation() ********************/
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GLUI_Rotation::GLUI_Rotation( void )
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{
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sprintf( name, "Rotation: %p", this );
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type = GLUI_CONTROL_ROTATION;
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w = GLUI_ROTATION_WIDTH;
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h = GLUI_ROTATION_HEIGHT;
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can_activate = true;
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live_type = GLUI_LIVE_FLOAT_ARRAY;
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float_array_size = 16;
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quadObj = NULL;
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alignment = GLUI_ALIGN_CENTER;
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can_spin = false;
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spinning = false;
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damping = 0.0;
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ball = new Arcball;
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reset();
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}
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