/external/AntTweakBar-1.16/examples/TwDualGLUT.c
C | 465 lines | 296 code | 84 blank | 85 comment | 18 complexity | 4499942a45859ec59d340d8c01915f63 MD5 | raw file
- // ---------------------------------------------------------------------------
- //
- // @file TwDualGLUT.c
- // @brief This example illustrates the use of AntTweakBar with multiple
- // windows. Here we are using GLUT to create a main window having
- // two sub-windows, each sub-window has a tweak bar.
- // This example extends the TwSimpleGLUT example.
- //
- // AntTweakBar: http://anttweakbar.sourceforge.net/doc
- // OpenGL: http://www.opengl.org
- // GLUT: http://opengl.org/resources/libraries/glut
- //
- // ---------------------------------------------------------------------------
- #include <AntTweakBar.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <math.h>
- #if defined(_WIN32) || defined(_WIN64)
- // MiniGLUT.h is provided to avoid the need of having GLUT installed to
- // recompile this example. Do not use it in your own programs, better
- // install and use the actual GLUT library SDK.
- # define USE_MINI_GLUT
- #endif
- #if defined(USE_MINI_GLUT)
- # include "../src/MiniGLUT.h"
- #elif defined(_MACOSX)
- # include <GLUT/glut.h>
- #else
- # include <GL/glut.h>
- #endif
- // This example displays one of the following shapes in each sub-window
- typedef enum { SHAPE_TEAPOT=1, SHAPE_TORUS, SHAPE_CONE } Shape;
- #define NUM_SHAPES 3
- typedef struct
- {
- int WinID;
- TwBar *Bar;
- Shape ObjectShape;
- float Zoom;
- float Rotation[4];
- int AutoRotate;
- int RotateTime;
- float RotateStart[4];
- float MatAmbient[4];
- float MatDiffuse[4];
- float LightMultiplier;
- float LightDirection[3];
- } SubWindowData;
- SubWindowData g_SubWindowData[2];
- // Routine to set a quaternion from a rotation axis and angle
- // ( input axis = float[3] angle = float output: quat = float[4] )
- void SetQuaternionFromAxisAngle(const float *axis, float angle, float *quat)
- {
- float sina2, norm;
- sina2 = (float)sin(0.5f * angle);
- norm = (float)sqrt(axis[0]*axis[0] + axis[1]*axis[1] + axis[2]*axis[2]);
- quat[0] = sina2 * axis[0] / norm;
- quat[1] = sina2 * axis[1] / norm;
- quat[2] = sina2 * axis[2] / norm;
- quat[3] = (float)cos(0.5f * angle);
- }
- // Routine to convert a quaternion to a 4x4 matrix
- // ( input: quat = float[4] output: mat = float[4*4] )
- void ConvertQuaternionToMatrix(const float *quat, float *mat)
- {
- float yy2 = 2.0f * quat[1] * quat[1];
- float xy2 = 2.0f * quat[0] * quat[1];
- float xz2 = 2.0f * quat[0] * quat[2];
- float yz2 = 2.0f * quat[1] * quat[2];
- float zz2 = 2.0f * quat[2] * quat[2];
- float wz2 = 2.0f * quat[3] * quat[2];
- float wy2 = 2.0f * quat[3] * quat[1];
- float wx2 = 2.0f * quat[3] * quat[0];
- float xx2 = 2.0f * quat[0] * quat[0];
- mat[0*4+0] = - yy2 - zz2 + 1.0f;
- mat[0*4+1] = xy2 + wz2;
- mat[0*4+2] = xz2 - wy2;
- mat[0*4+3] = 0;
- mat[1*4+0] = xy2 - wz2;
- mat[1*4+1] = - xx2 - zz2 + 1.0f;
- mat[1*4+2] = yz2 + wx2;
- mat[1*4+3] = 0;
- mat[2*4+0] = xz2 + wy2;
- mat[2*4+1] = yz2 - wx2;
- mat[2*4+2] = - xx2 - yy2 + 1.0f;
- mat[2*4+3] = 0;
- mat[3*4+0] = mat[3*4+1] = mat[3*4+2] = 0;
- mat[3*4+3] = 1;
- }
- // Routine to multiply 2 quaternions (ie, compose rotations)
- // ( input q1 = float[4] q2 = float[4] output: qout = float[4] )
- void MultiplyQuaternions(const float *q1, const float *q2, float *qout)
- {
- float qr[4];
- qr[0] = q1[3]*q2[0] + q1[0]*q2[3] + q1[1]*q2[2] - q1[2]*q2[1];
- qr[1] = q1[3]*q2[1] + q1[1]*q2[3] + q1[2]*q2[0] - q1[0]*q2[2];
- qr[2] = q1[3]*q2[2] + q1[2]*q2[3] + q1[0]*q2[1] - q1[1]*q2[0];
- qr[3] = q1[3]*q2[3] - (q1[0]*q2[0] + q1[1]*q2[1] + q1[2]*q2[2]);
- qout[0] = qr[0]; qout[1] = qr[1]; qout[2] = qr[2]; qout[3] = qr[3];
- }
- // Return elapsed time in milliseconds
- int GetTimeMs()
- {
- #if !defined(_WIN32)
- return glutGet(GLUT_ELAPSED_TIME);
- #else
- // glutGet(GLUT_ELAPSED_TIME) seems buggy on Windows
- return (int)GetTickCount();
- #endif
- }
- // Find the current WindowData
- SubWindowData *GetCurrentSubWindowData()
- {
- int i, currWinID;
- currWinID = glutGetWindow();
- for (i = 0; i < 2; i++)
- if (g_SubWindowData[i].WinID == currWinID)
- return &g_SubWindowData[i];
- return NULL;
- }
- // Callback function called by GLUT to render the main window content
- void DisplayMainWindow(void)
- {
- // Clear frame buffer
- glClearColor(1, 0.8f, 0.4f, 1);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- // Present frame buffer
- glutSwapBuffers();
- }
- // Callback function called by GLUT when the main window size has changed
- void ReshapeMainWindow(int width, int height)
- {
- if (width > 32 && height > 32)
- {
- glutSetWindow(g_SubWindowData[0].WinID);
- glutPositionWindow(8, 8);
- glutReshapeWindow(width/2-16, height-16);
- glutSetWindow(g_SubWindowData[1].WinID);
- glutPositionWindow(width/2+8, 8);
- glutReshapeWindow(width/2-16, height-16);
- }
- }
- // Callback function called by GLUT to render sub-window content
- void DisplaySubWindow(void)
- {
- float v[4]; // will be used to set light parameters
- float mat[4*4]; // rotation matrix
- SubWindowData *win;
- win = GetCurrentSubWindowData();
- if (win == NULL) return;
- // Tell AntTweakBar which is the current window
- TwSetCurrentWindow(win->WinID);
- // Clear frame buffer
- glClearColor(0, 0, 0, 1);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glEnable(GL_DEPTH_TEST);
- glDisable(GL_CULL_FACE);
- glEnable(GL_NORMALIZE);
- // Set light
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- v[0] = v[1] = v[2] = win->LightMultiplier*0.4f; v[3] = 1.0f;
- glLightfv(GL_LIGHT0, GL_AMBIENT, v);
- v[0] = v[1] = v[2] = win->LightMultiplier*0.8f; v[3] = 1.0f;
- glLightfv(GL_LIGHT0, GL_DIFFUSE, v);
- v[0] = -win->LightDirection[0]; v[1] = -win->LightDirection[1]; v[2] = -win->LightDirection[2]; v[3] = 0.0f;
- glLightfv(GL_LIGHT0, GL_POSITION, v);
- // Set material
- glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, win->MatAmbient);
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, win->MatDiffuse);
- // Rotate and draw shape
- glPushMatrix();
- glTranslatef(0.5f, -0.3f, 0.0f);
- if( win->AutoRotate )
- {
- float axis[3] = { 0, 1, 0 };
- float angle = (float)(GetTimeMs()-win->RotateTime)/1000.0f;
- float quat[4];
- SetQuaternionFromAxisAngle(axis, angle, quat);
- MultiplyQuaternions(win->RotateStart, quat, win->Rotation);
- }
- ConvertQuaternionToMatrix(win->Rotation, mat);
- glMultMatrixf(mat);
- glScalef(win->Zoom, win->Zoom, win->Zoom);
- glCallList(win->ObjectShape);
- glPopMatrix();
- // Draw tweak bars
- TwDraw();
- // Present frame buffer
- glutSwapBuffers();
- // Recall Display at next frame
- glutPostRedisplay();
- }
- // Callback function called by GLUT when sub-window size has changed
- void ReshapeSubWindow(int width, int height)
- {
- SubWindowData *win;
-
- win = GetCurrentSubWindowData();
- if (win == NULL) return;
- // Set OpenGL viewport and camera
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(40, (double)width/height, 1, 10);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- gluLookAt(0,0,5, 0,0,0, 0,1,0);
- glTranslatef(0, 0.6f, -1);
- // Send the new window size to AntTweakBar
- TwSetCurrentWindow(win->WinID);
- TwWindowSize(width, height);
- }
- // Function called at exit
- void Terminate(void)
- {
- int i;
- for (i=0; i<2; i++) {
- glutSetWindow(g_SubWindowData[i].WinID);
- glDeleteLists(SHAPE_TEAPOT, NUM_SHAPES);
- }
- TwTerminate();
- }
- // Callback function called when the 'AutoRotate' variable value of the tweak bar has changed
- void TW_CALL SetAutoRotateCB(const void *value, void *clientData)
- {
- SubWindowData *win;
-
- win = (SubWindowData *)clientData;
- win->AutoRotate = *(const int *)value; // copy value to win->AutoRotate
- if (win->AutoRotate != 0)
- {
- // init rotation
- win->RotateTime = GetTimeMs();
- win->RotateStart[0] = win->Rotation[0];
- win->RotateStart[1] = win->Rotation[1];
- win->RotateStart[2] = win->Rotation[2];
- win->RotateStart[3] = win->Rotation[3];
- }
- // make Rotation variable read-only or read-write
- TwSetCurrentWindow(win->WinID);
- TwSetParam(win->Bar, "ObjRotation", "readonly", TW_PARAM_INT32, 1, &win->AutoRotate);
- }
- // Callback function called by the tweak bar to get the 'AutoRotate' value
- void TW_CALL GetAutoRotateCB(void *value, void *clientData)
- {
- SubWindowData *win;
-
- win = (SubWindowData *)clientData;
- *(int *)value = win->AutoRotate; // copy win->AutoRotate to value
- }
- // Mouse Button event callbacks
- int MouseButtonCB(int glutButton, int glutState, int mouseX, int mouseY)
- {
- TwSetCurrentWindow(glutGetWindow());
- return TwEventMouseButtonGLUT(glutButton,glutState,mouseX,mouseY);
- }
- // Mouse Motion event callbacks
- int MouseMotionCB(int mouseX, int mouseY)
- {
- TwSetCurrentWindow(glutGetWindow());
- return TwEventMouseMotionGLUT(mouseX,mouseY);
- }
- // Keyboard event callbacks
- int KeyboardCB(unsigned char glutKey, int mouseX, int mouseY)
- {
- TwSetCurrentWindow(glutGetWindow());
- return TwEventKeyboardGLUT(glutKey,mouseX,mouseY);
- }
- // Special key event callbacks
- int SpecialKeyCB(int glutKey, int mouseX, int mouseY)
- {
- TwSetCurrentWindow(glutGetWindow());
- return TwEventSpecialGLUT(glutKey,mouseX,mouseY);
- }
- // Setup new sub-window
- void SetupSubWindow(int subWinIdx)
- {
- float axis[] = { 0.7f, 0.7f, 0.0f }; // initial model rotation
- float angle = 0.8f;
- SubWindowData *win;
-
- win = &g_SubWindowData[subWinIdx];
- win->ObjectShape = (subWinIdx == 0) ? SHAPE_TEAPOT : SHAPE_TORUS;
- win->Zoom = 1;
- win->AutoRotate = (subWinIdx == 0);
- win->MatAmbient[0] = (subWinIdx == 1) ? 0.0f : 0.5f;; win->MatAmbient[1] = win->MatAmbient[2] = 0.2f; win->MatAmbient[3] = 1;
- win->MatDiffuse[0] = (subWinIdx == 1) ? 0.0f : 1.0f; win->MatDiffuse[1] = 1; win->MatDiffuse[2] = 0; win->MatDiffuse[3] = 1;
- win->LightMultiplier = 1;
- win->LightDirection[0] = win->LightDirection[1] = win->LightDirection[2] = -0.57735f;
- win->RotateTime = GetTimeMs();
- SetQuaternionFromAxisAngle(axis, angle, win->Rotation);
- SetQuaternionFromAxisAngle(axis, angle, win->RotateStart);
-
- glutSetWindow(win->WinID);
- // Set GLUT callbacks
- glutDisplayFunc(DisplaySubWindow);
- glutReshapeFunc(ReshapeSubWindow);
- // Set GLUT event callbacks
- // - Register mouse button events callback
- glutMouseFunc((GLUTmousebuttonfun)MouseButtonCB);
- // - Register mouse motion events callback
- glutMotionFunc((GLUTmousemotionfun)MouseMotionCB);
- // - Register mouse "passive" motion events (same as Motion)
- glutPassiveMotionFunc((GLUTmousemotionfun)MouseMotionCB);
- // - Register keyboard events callback
- glutKeyboardFunc((GLUTkeyboardfun)KeyboardCB);
- // - Register special key events callback
- glutSpecialFunc((GLUTspecialfun)SpecialKeyCB);
- // - Send 'glutGetModifers' function pointer to AntTweakBar;
- // required because the GLUT key event functions do not report key modifiers states.
- TwGLUTModifiersFunc(glutGetModifiers);
- // Create some 3D objects (stored in display lists)
- glNewList(SHAPE_TEAPOT, GL_COMPILE);
- glutSolidTeapot(1.0);
- glEndList();
- glNewList(SHAPE_TORUS, GL_COMPILE);
- glutSolidTorus(0.3, 1.0, 16, 32);
- glEndList();
- glNewList(SHAPE_CONE, GL_COMPILE);
- glutSolidCone(1.0, 1.5, 64, 4);
- glEndList();
- // Declare this window as current for AntTweakBar.
- // Here, this will create a new AntTweakBar context for this window,
- // which will be identified by the number WinID.
- TwSetCurrentWindow(win->WinID);
- // Create a tweak bar
- win->Bar = TwNewBar("TweakBar");
- TwDefine(" GLOBAL help='This example shows how to use AntTweakBar with multiple windows.' "); // Message added to the help bar.
- TwDefine(" TweakBar size='200 400' color='96 216 224' "); // change default tweak bar size and color
- // Add 'win->Zoom' to 'bar': this is a modifable (RW) variable of type TW_TYPE_FLOAT. Its key shortcuts are [z] and [Z].
- TwAddVarRW(win->Bar, "Zoom", TW_TYPE_FLOAT, &win->Zoom,
- " min=0.01 max=2.5 step=0.01 keyIncr=z keyDecr=Z help='Scale the object (1=original size).' ");
- // Add 'win->Rotation' to 'bar': this is a variable of type TW_TYPE_QUAT4F which defines the object's orientation
- TwAddVarRW(win->Bar, "ObjRotation", TW_TYPE_QUAT4F, &win->Rotation,
- " label='Object rotation' open help='Change the object orientation.' ");
- // Add callback to toggle auto-rotate mode (callback functions are defined above).
- TwAddVarCB(win->Bar, "AutoRotate", TW_TYPE_BOOL32, SetAutoRotateCB, GetAutoRotateCB, win,
- " label='Auto-rotate' key=space help='Toggle auto-rotate mode.' ");
- // Add 'win->LightMultiplier' to 'bar': this is a variable of type TW_TYPE_FLOAT. Its key shortcuts are [+] and [-].
- TwAddVarRW(win->Bar, "Multiplier", TW_TYPE_FLOAT, &win->LightMultiplier,
- " label='Light booster' min=0.1 max=4 step=0.02 keyIncr='+' keyDecr='-' help='Increase/decrease the light power.' ");
- // Add 'win->LightDirection' to 'bar': this is a variable of type TW_TYPE_DIR3F which defines the light direction
- TwAddVarRW(win->Bar, "LightDir", TW_TYPE_DIR3F, &win->LightDirection,
- " label='Light direction' open help='Change the light direction.' ");
- // Add 'win->MatAmbient' to 'bar': this is a variable of type TW_TYPE_COLOR3F (3 floats color, alpha is ignored)
- // and is inserted into a group named 'Material'.
- TwAddVarRW(win->Bar, "Ambient", TW_TYPE_COLOR3F, &win->MatAmbient, " group='Material' ");
- // Add 'win->MatDiffuse' to 'bar': this is a variable of type TW_TYPE_COLOR3F (3 floats color, alpha is ignored)
- // and is inserted into group 'Material'.
- TwAddVarRW(win->Bar, "Diffuse", TW_TYPE_COLOR3F, &win->MatDiffuse, " group='Material' ");
- // Add the enum variable 'win->ObjectShape' to 'bar'
- // (before adding an enum variable, its enum type must be declared to AntTweakBar as follow)
- {
- // ShapeEV associates Shape enum values with labels that will be displayed instead of enum values
- TwEnumVal shapeEV[NUM_SHAPES] = { {SHAPE_TEAPOT, "Teapot"}, {SHAPE_TORUS, "Torus"}, {SHAPE_CONE, "Cone"} };
- // Create a type for the enum shapeEV
- TwType shapeType = TwDefineEnum("ShapeType", shapeEV, NUM_SHAPES);
- // add 'win->CurrentShape' to 'bar': this is a variable of type ShapeType. Its key shortcuts are [<] and [>].
- TwAddVarRW(win->Bar, "Shape", shapeType, &win->ObjectShape, " keyIncr='<' keyDecr='>' help='Change object shape.' ");
- }
- }
- // Main
- int main(int argc, char *argv[])
- {
- int mainWinID;
- // Initialize GLUT
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
- glutInitWindowSize(960, 480);
- mainWinID = glutCreateWindow("AntTweakBar multi-window example");
- glutCreateMenu(NULL);
- glutDisplayFunc(DisplayMainWindow);
- glutReshapeFunc(ReshapeMainWindow);
- // Initialize AntTweakBar
- TwInit(TW_OPENGL, NULL);
- // Create two sub-windows
- g_SubWindowData[0].WinID = glutCreateSubWindow(mainWinID, 8, 8, 480, 464);
- SetupSubWindow(0);
- g_SubWindowData[1].WinID = glutCreateSubWindow(mainWinID, 488, 8, 464, 464);
- SetupSubWindow(1);
-
- atexit(Terminate); // Called after glutMainLoop ends
- // Call the GLUT main loop
- glutMainLoop();
- return 0;
- }