mirror of
https://github.com/NGSolve/netgen.git
synced 2024-09-23 02:02:49 +05:00
490 lines
13 KiB
C
490 lines
13 KiB
C
/* $Id: pbuffer.c,v 1.2 2009/02/05 06:57:10 gregcouch Exp $ */
|
|
|
|
/*
|
|
* Togl - a Tk OpenGL widget
|
|
* Copyright (C) 1996-1997 Brian Paul and Ben Bederson
|
|
* Copyright (C) 2006-2007 Greg Couch
|
|
* See the LICENSE file for copyright details.
|
|
*/
|
|
|
|
#undef PBUFFER_DEBUG
|
|
|
|
#define USE_TOGL_STUBS
|
|
|
|
#include "togl.h"
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#if defined(TOGL_AGL)
|
|
# include <OpenGL/glu.h>
|
|
# include <AGL/agl.h>
|
|
#elif defined(TOGL_NSOPENGL)
|
|
# include <OpenGL/glu.h>
|
|
# include <OpenGL/OpenGL.h>
|
|
#else
|
|
# include <GL/glu.h>
|
|
#endif
|
|
#include <GL/glext.h> /* OpenGL 1.4 GL_GENERATE_MIPMAP */
|
|
|
|
#undef TCL_STORAGE_CLASS
|
|
#define TCL_STORAGE_CLASS DLLEXPORT
|
|
|
|
static double xAngle = 0, yAngle = 0, zAngle = 0;
|
|
static GLdouble CornerX, CornerY, CornerZ; /* where to print strings */
|
|
static GLuint texture;
|
|
static Togl *output;
|
|
|
|
/*
|
|
* Togl widget create callback. This is called by Tcl/Tk when the widget has
|
|
* been realized. Here's where one may do some one-time context setup or
|
|
* initializations.
|
|
*/
|
|
static int
|
|
create_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
Togl *togl;
|
|
double version;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
version = atof((const char *) glGetString(GL_VERSION));
|
|
if (version < 1.4) {
|
|
Tcl_SetResult(interp, "need OpenGL 1.4 or later", TCL_STATIC);
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
* Togl widget reshape callback. This is called by Tcl/Tk when the widget
|
|
* has been resized. Typically, we call glViewport and perhaps setup the
|
|
* projection matrix.
|
|
*/
|
|
static int
|
|
reshape_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
int width;
|
|
int height;
|
|
double aspect;
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
width = Togl_Width(togl);
|
|
height = Togl_Height(togl);
|
|
aspect = (double) width / (double) height;
|
|
|
|
glViewport(0, 0, width, height);
|
|
|
|
/* Set up projection transform */
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glFrustum(-aspect, aspect, -1, 1, 1, 10);
|
|
|
|
CornerX = -aspect;
|
|
CornerY = -1;
|
|
CornerZ = -1.1;
|
|
|
|
/* Change back to model view transform for rendering */
|
|
glMatrixMode(GL_MODELVIEW);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
* Togl widget reshape callback. This is called by Tcl/Tk when the widget
|
|
* has been resized. Typically, we call glViewport and perhaps setup the
|
|
* projection matrix.
|
|
*/
|
|
static int
|
|
reshape2_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
int width;
|
|
int height;
|
|
double aspect;
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
width = Togl_Width(togl);
|
|
height = Togl_Height(togl);
|
|
aspect = (double) width / (double) height;
|
|
|
|
glViewport(0, 0, width, height);
|
|
|
|
/* Set up projection transform */
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glOrtho(-aspect, aspect, -1, 1, -1, 1);
|
|
|
|
/* Change back to model view transform for rendering */
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
static void
|
|
draw_object()
|
|
{
|
|
static GLuint cubeList = 0;
|
|
|
|
glLoadIdentity(); /* Reset modelview matrix to the identity
|
|
* matrix */
|
|
glTranslatef(0, 0, -3); /* Move the camera back three units */
|
|
glRotated(xAngle, 1, 0, 0); /* Rotate by X, Y, and Z angles */
|
|
glRotated(yAngle, 0, 1, 0);
|
|
glRotated(zAngle, 0, 0, 1);
|
|
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
if (!cubeList) {
|
|
cubeList = glGenLists(1);
|
|
glNewList(cubeList, GL_COMPILE);
|
|
|
|
/* Front face */
|
|
glBegin(GL_QUADS);
|
|
glColor3f(0, 0.7f, 0.1f); /* Green */
|
|
glVertex3f(-1, 1, 1);
|
|
glVertex3f(1, 1, 1);
|
|
glVertex3f(1, -1, 1);
|
|
glVertex3f(-1, -1, 1);
|
|
/* Back face */
|
|
glColor3f(0.9f, 1, 0); /* Yellow */
|
|
glVertex3f(-1, 1, -1);
|
|
glVertex3f(1, 1, -1);
|
|
glVertex3f(1, -1, -1);
|
|
glVertex3f(-1, -1, -1);
|
|
/* Top side face */
|
|
glColor3f(0.2f, 0.2f, 1); /* Blue */
|
|
glVertex3f(-1, 1, 1);
|
|
glVertex3f(1, 1, 1);
|
|
glVertex3f(1, 1, -1);
|
|
glVertex3f(-1, 1, -1);
|
|
/* Bottom side face */
|
|
glColor3f(0.7f, 0, 0.1f); /* Red */
|
|
glVertex3f(-1, -1, 1);
|
|
glVertex3f(1, -1, 1);
|
|
glVertex3f(1, -1, -1);
|
|
glVertex3f(-1, -1, -1);
|
|
glEnd();
|
|
|
|
glEndList();
|
|
|
|
}
|
|
glCallList(cubeList);
|
|
}
|
|
|
|
/*
|
|
* Togl widget display callback. This is called by Tcl/Tk when the widget's
|
|
* contents have to be redrawn. Typically, we clear the color and depth
|
|
* buffers, render our objects, then swap the front/back color buffers.
|
|
*/
|
|
static int
|
|
display_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK)
|
|
return TCL_ERROR;
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
draw_object();
|
|
|
|
#ifdef PBUFFER_DEBUG
|
|
{
|
|
Tk_PhotoHandle photo;
|
|
|
|
/* first tcl: image create photo test */
|
|
photo = Tk_FindPhoto(interp, "test2");
|
|
if (photo == NULL) {
|
|
fprintf(stderr, "missing tk photo object test2\n");
|
|
} else {
|
|
Togl_TakePhoto(togl, photo);
|
|
Tcl_Eval(interp, "test2 write test2.ppm -format ppm");
|
|
}
|
|
}
|
|
#endif
|
|
Togl_SwapBuffers(togl);
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
* Togl widget display callback. This is called by Tcl/Tk when the widget's
|
|
* contents have to be redrawn. Typically, we clear the color and depth
|
|
* buffers, render our objects, then swap the front/back color buffers.
|
|
*/
|
|
static int
|
|
display2_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
Togl *togl;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK)
|
|
return TCL_ERROR;
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
if (texture) {
|
|
glEnable(GL_TEXTURE_2D);
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
glBegin(GL_QUADS);
|
|
glTexCoord2i(0, 0);
|
|
glVertex2i(-1, -1);
|
|
glTexCoord2i(1, 0);
|
|
glVertex2i(1, -1);
|
|
glTexCoord2i(1, 1);
|
|
glVertex2i(1, 1);
|
|
glTexCoord2i(0, 1);
|
|
glVertex2i(-1, 1);
|
|
glEnd();
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
}
|
|
|
|
Togl_SwapBuffers(togl);
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
* Togl widget display callback. This is called by Tcl/Tk when the widget's
|
|
* contents have to be redrawn. Typically, we clear the color and depth
|
|
* buffers, render our objects, then swap the front/back color buffers.
|
|
*/
|
|
static int
|
|
pbuffer_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
Togl *togl;
|
|
int width;
|
|
int height;
|
|
GLenum error;
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &togl) != TCL_OK)
|
|
return TCL_ERROR;
|
|
|
|
width = Togl_Width(togl);
|
|
height = Togl_Height(togl);
|
|
|
|
if (texture == 0) {
|
|
glGenTextures(1, &texture);
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
#if !defined(TOGL_AGL) && !defined(TOGL_NSOPENGL)
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
|
|
GL_LINEAR_MIPMAP_LINEAR);
|
|
#else
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
#endif
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB,
|
|
GL_BYTE, NULL);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
error = glGetError();
|
|
if (error != GL_NO_ERROR) {
|
|
fprintf(stderr, "texture init: %s\n", gluErrorString(error));
|
|
}
|
|
#if 0 && defined(TOGL_AGL)
|
|
AGLContext ctx = aglGetCurrentContext();
|
|
AGLPbuffer pbuf;
|
|
GLint face, level, screen;
|
|
GLenum err;
|
|
|
|
aglGetPBuffer(ctx, &pbuf, &face, &level, &screen);
|
|
err = aglGetError();
|
|
if (err != AGL_NO_ERROR)
|
|
fprintf(stderr, "getPBuffer: %s\n", aglErrorString(err));
|
|
aglTexImagePBuffer(ctx, pbuf, GL_FRONT);
|
|
err = aglGetError();
|
|
if (err != AGL_NO_ERROR)
|
|
fprintf(stderr, "teximagepbuffer: %s\n", aglErrorString(err));
|
|
#endif
|
|
}
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
draw_object();
|
|
|
|
#if 1 || !defined(TOGL_AGL)
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, width, height);
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
error = glGetError();
|
|
if (error != GL_NO_ERROR) {
|
|
fprintf(stderr, "after tex copy: %s\n", gluErrorString(error));
|
|
}
|
|
#endif
|
|
#ifdef PBUFFER_DEBUG
|
|
{
|
|
Tk_PhotoHandle photo;
|
|
|
|
/* first tcl: image create photo test */
|
|
photo = Tk_FindPhoto(interp, "test");
|
|
Togl_TakePhoto(togl, photo);
|
|
Tcl_Eval(interp, "test write test.ppm -format ppm");
|
|
}
|
|
#endif
|
|
Togl_SwapBuffers(togl);
|
|
if (output)
|
|
Togl_PostRedisplay(output);
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
static int
|
|
setXrot_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "angle");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Tcl_GetDoubleFromObj(interp, objv[1], &xAngle) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
/* printf( "before %f ", xAngle ); */
|
|
|
|
xAngle = fmod(xAngle, 360.0);
|
|
if (xAngle < 0.0)
|
|
xAngle += 360.0;
|
|
|
|
/* printf( "after %f \n", xAngle ); */
|
|
|
|
/* Let result string equal value */
|
|
Tcl_SetObjResult(interp, objv[1]);
|
|
return TCL_OK;
|
|
}
|
|
|
|
|
|
static int
|
|
setYrot_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "angle");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Tcl_GetDoubleFromObj(interp, objv[1], &yAngle) != TCL_OK) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
yAngle = fmod(yAngle, 360.0);
|
|
if (yAngle < 0.0)
|
|
yAngle += 360.0;
|
|
|
|
/* Let result equal value */
|
|
Tcl_SetObjResult(interp, objv[1]);
|
|
return TCL_OK;
|
|
}
|
|
|
|
static int
|
|
setOutput_cb(ClientData clientData, Tcl_Interp *interp, int objc,
|
|
Tcl_Obj *const *objv)
|
|
{
|
|
|
|
if (objc != 2) {
|
|
Tcl_WrongNumArgs(interp, 1, objv, "pathName");
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
if (Togl_GetToglFromObj(interp, objv[1], &output) != TCL_OK)
|
|
return TCL_ERROR;
|
|
|
|
return TCL_OK;
|
|
}
|
|
|
|
/*
|
|
* Called by Tcl to let me initialize the modules (Togl) I will need.
|
|
*/
|
|
EXTERN int
|
|
Pbuffer_Init(Tcl_Interp *interp)
|
|
{
|
|
/*
|
|
* Initialize Tcl and the Togl widget module.
|
|
*/
|
|
if (Tcl_InitStubs(interp, "8.1", 0) == NULL
|
|
#ifdef PBUFFER_DEBUG
|
|
|| Tk_InitStubs(interp, "8.1", 0) == NULL
|
|
#endif
|
|
|| Togl_InitStubs(interp, "2.0", 0) == NULL) {
|
|
return TCL_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Specify the C callback functions for widget creation, display,
|
|
* and reshape.
|
|
*/
|
|
Tcl_CreateObjCommand(interp, "create_cb", create_cb, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "display_cb", display_cb, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "display2_cb", display2_cb, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "pbuffer_cb", pbuffer_cb, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "reshape_cb", reshape_cb, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "reshape2_cb", reshape2_cb, NULL, NULL);
|
|
|
|
/*
|
|
* Make a new Togl widget command so the Tcl code can set a C variable.
|
|
*/
|
|
|
|
Tcl_CreateObjCommand(interp, "setXrot", setXrot_cb, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "setYrot", setYrot_cb, NULL, NULL);
|
|
Tcl_CreateObjCommand(interp, "setOutput", setOutput_cb, NULL, NULL);
|
|
|
|
/*
|
|
* Call Tcl_CreateCommand for application-specific commands, if
|
|
* they weren't already created by the init procedures called above.
|
|
*/
|
|
|
|
return TCL_OK;
|
|
}
|