Diff of /examples/vr-demo/main.c

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	revision 2060, Tue Oct 30 19:31:28 2012 UTC	revision 2061, Tue Oct 30 21:55:10 2012 UTC
#	Line 10	Line 10
10	* All rights reserved.	* All rights reserved.
11	*/	*/
12
	#include <AntTweakBar.h>
13	#include "GL/glfw.h"	#include "GL/glfw.h"
14	#include "util.h"	#include "util.h"
15	#include "vr-lite.h"	#include "vr-lite.h"
16	#include <unistd.h>	#include <unistd.h>
17
18		/* minimum and maximum values from */
19		#define MIN_VALUE       0
20		#define MAX_VALUE       2632
21
22		/* half the width of the opacity range */
23		#define OPAC_HALF_WID   150
24
25		#define MIN_OPAC_MID    ((float)(MIN_VALUE+OPAC_HALF_WID))
26		#define MAX_OPAC_MID    ((float)(MAX_VALUE-OPAC_HALF_WID))
27
28	/* pixel dimensions of output */	/* pixel dimensions of output */
29	#define WIDTH   990	#define WIDTH   480
30	#define HEIGHT  990	#define HEIGHT  345
31
32	/* world bounds */	/* world bounds */
33	#define WRLD_MIN_X      0.0	#define WRLD_MIN_X      0.0
#	Line 46	Line 55
55	unsigned int    Width;          // view window width	unsigned int    Width;          // view window width
56	unsigned int    Height;         // view window height	unsigned int    Height;         // view window height
57	GLuint          ImageTexture;   // Texture ID of background image	GLuint          ImageTexture;   // Texture ID of background image
	float           WrldOrigin[2];
	float           WrldDim[2];
58
59	typedef struct {
	TwBar       *ctls;
	unsigned int running;
	} State_t;
60
61	// Callback function called by GLUT to render screen	// Callback function called by GLUT to render screen
62	void Draw (Nrrd *img)	void Draw (Nrrd *img)
#	Line 184	Line 188
188	}	}
189	}	}
190
191	void GetData (ISO_World_t *wrld, Nrrd *nData)	void GetData (VR_World_t *wrld, Nrrd *nData)
192	{	{
193	// get snapshot of state	// get snapshot of state
194	if (ISO_Snapshot_pos (wrld, nData)) {	if (VR_Snapshot_pos (wrld, nData)) {
195	// error	// error
196	fprintf(stderr, "Error getting nrrd data\n");	fprintf(stderr, "Error getting nrrd data\n");
197	exit(1);	exit(1);
#	Line 196	Line 200
200
201	int main (int argc, const char **argv)	int main (int argc, const char **argv)
202	{	{
	State_t     state = { .running = 0 };
203	// Initialize GLFW	// Initialize GLFW
204	if (0 == glfwInit()) {	if (0 == glfwInit()) {
205	// An error occured	// An error occured
#	Line 213	Line 215
215	glfwTerminate();	glfwTerminate();
216	return 1;	return 1;
217	}	}
	glfwEnable(GLFW_MOUSE_CURSOR);
218	glfwEnable(GLFW_KEY_REPEAT);	glfwEnable(GLFW_KEY_REPEAT);
219	glfwSetWindowTitle("Diderot Iso2D Animation");	glfwSetWindowTitle("Diderot VR Demo");
	// Initialize AntTweakBar
	TwInit (TW_OPENGL, 0);
	// create a tweakbar
	TwBar *tweakBar = TwNewBar("Controls");
	state.ctls = tweakBar;
	unsigned int NumSteps = 0;
	TwAddVarRO (tweakBar, "NumSteps", TW_TYPE_UINT32, &NumSteps, " label='# of steps' ");
	TwAddButton (tweakBar, "StartButton", StartButtonCB, &state, " label='Start' ");
220
221	// Set GLFW event callbacks	// Set GLFW event callbacks
222	glfwSetWindowSizeCallback (WindowSizeCB);	glfwSetWindowSizeCallback (WindowSizeCB);
223	glfwSetMouseButtonCallback ((GLFWmousebuttonfun)TwEventMouseButtonGLFW);  // redirect to AntTweakBar	glfwSetKeyCallback ((GLFWkeyfun)TwEventKeyGLFW);
	glfwSetMousePosCallback ((GLFWmouseposfun)TwEventMousePosGLFW);  // redirect to AntTweakBar
	glfwSetMouseWheelCallback ((GLFWmousewheelfun)TwEventMouseWheelGLFW);  // redirect to AntTweakBar
	glfwSetKeyCallback ((GLFWkeyfun)TwEventKeyGLFW);  // redirect to AntTweakBar
	glfwSetCharCallback ((GLFWcharfun)TwEventCharGLFW);  // redirect to AntTweakBar
224
225	// load Diderot image for background texture	// load Diderot image for background texture
226	InitTexture ();	InitTexture ();
#	Line 246	Line 233
233	WrldDim[1] = 0.013125 * 80.0;	WrldDim[1] = 0.013125 * 80.0;
234
235	// initialize the Diderot program	// initialize the Diderot program
236	ISO_World_t *wrld = ISO_Init ();	VR_World_t *wrld = VR_Init ();
	ISO_Initially (wrld);
237
238	// nrrd for getting computational state	// nrrd for getting computational state
239	Nrrd *nData = nrrdNew();	Nrrd *nRGB = nrrdNew();
240
241	// get and render initial state	// get and render initial state
242	GetData (wrld, nData);	GetData (wrld, nData);
#	Line 258	Line 244
244
245	// Main loop (repeated while window is not closed and [ESC] is not pressed)	// Main loop (repeated while window is not closed and [ESC] is not pressed)
246	while (glfwGetWindowParam(GLFW_OPENED) && !glfwGetKey(GLFW_KEY_ESC)) {	while (glfwGetWindowParam(GLFW_OPENED) && !glfwGetKey(GLFW_KEY_ESC)) {
247	if (state.running != 0) {	if (NeedsRecompute) {
248	while ((state.running != 0) && (ISO_NumActive(wrld) > 0)) {	// recompute
249	// step the computation	VR_Initially (wrld);
250	NumSteps += ISO_Run (wrld, STEP_SIZE);	VR_Run (wrld, 0);
251	// get and render the state	// get output image
252	GetData (wrld, nData);	if (VR_OutputGet_outRGBA (wrld, nRGB)) {
	Draw (nData);
	usleep (SLEEP_MS * 1000);  // sleep for a bit
	}
	if (ISO_NumActive(wrld) == 0) {
	// get and render final state
	if (ISO_OutputGet_pos (wrld, nData)) {
253	// error	// error
254	fprintf(stderr, "Error getting nrrd data\n");	fprintf(stderr, "Error getting nrrd data\n");
255	exit(1);	exit(1);
256	}	}
	Draw (nData);
257	}	}
258		if (NeedsRedraw) {
259	}	}
	else {
260	glfwWaitEvents();	glfwWaitEvents();
	Draw(nData);
	}
261	}	}
262
263	// shutdown the world	// shutdown the world
264	ISO_Shutdown (wrld);	VR_Shutdown (wrld);
265
266	// Terminate AntTweakBar and GLFW	// Terminate AntTweakBar and GLFW
267	TwTerminate();	TwTerminate();

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