/** A callback function that will get called whenever the tracker
* provides us with new data. This may be called repeatedly for each
* record that we have missed if many records have been delivered
* since the last call to the VRPN mainloop() function. */
static void VRPN_CALLBACK handle_tracker(void *name, vrpn_TRACKERCB t)
{
float fps = kuhl_getfps(&fps_state);
if(fps_state.frame == 0)
msg(INFO, "VRPN records per second: %.1f\n", fps);
/* Some tracking systems return large values when a point gets
* lost. If the tracked point seems to be lost, ignore this
* update. */
float pos[3];
vec3f_set(pos, t.pos[0], t.pos[1], t.pos[2]);
long microseconds = (t.msg_time.tv_sec* 1000000L) + t.msg_time.tv_usec;
if(0)
{
printf("Current time %ld; VRPN record time: %ld\n", kuhl_microseconds(), microseconds);
printf("Received position from vrpn: ");
vec3f_print(pos);
}
if(vec3f_norm(pos) > 100)
return;
// Store the data in our map so that someone can use it later.
std::string s = (char*)name;
nameToCallbackData[s] = t;
smooth(nameToCallbackData[s]);
}
void display()
{
/* If we are using DGR, send or receive data to keep multiple
* processes/computers synchronized. */
dgr_update();
/* Get current frames per second calculations. */
float fps = kuhl_getfps(&fps_state);
if(dgr_is_enabled() == 0 || dgr_is_master())
{
// If DGR is being used, only display dgr counter if we are
// the master process.
// Check if FPS value was just updated by kuhl_getfps()
if(fps_state.frame == 0)
{
char label[1024];
snprintf(label, 1024, "FPS: %0.1f", fps);
/* Delete old label if it exists */
if(fpsLabel != 0)
glDeleteTextures(1, &fpsLabel);
/* Make a new label */
float labelColor[3] = { 1,1,1 };
float labelBg[4] = { 0,0,0,.3 };
/* Change the last parameter (point size) to adjust the
* size of the texture that the text is rendered in to. */
fpsLabelAspectRatio = kuhl_make_label(label,
&fpsLabel,
labelColor, labelBg, 24);
if(fpsLabel != 0)
kuhl_geometry_texture(&labelQuad, fpsLabel, "tex", 1);
}
}
/* Ensure the slaves use the same render style as the master
* process. */
dgr_setget("style", &renderStyle, sizeof(int));
/* Render the scene once for each viewport. Frequently one
* viewport will fill the entire screen. However, this loop will
* run twice for HMDs (once for the left eye and once for the
* right. */
viewmat_begin_frame();
for(int viewportID=0; viewportID<viewmat_num_viewports(); viewportID++)
{
viewmat_begin_eye(viewportID);
/* Where is the viewport that we are drawing onto and what is its size? */
int viewport[4]; // x,y of lower left corner, width, height
viewmat_get_viewport(viewport, viewportID);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
/* Clear the current viewport. Without glScissor(), glClear()
* clears the entire screen. We could call glClear() before
* this viewport loop---but on order for all variations of
* this code to work (Oculus support, etc), we can only draw
* after viewmat_begin_eye(). */
glScissor(viewport[0], viewport[1], viewport[2], viewport[3]);
glEnable(GL_SCISSOR_TEST);
glClearColor(.2,.2,.2,0); // set clear color to grey
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glDisable(GL_SCISSOR_TEST);
glEnable(GL_DEPTH_TEST); // turn on depth testing
kuhl_errorcheck();
/* Turn on blending (note, if you are using transparent textures,
the transparency may not look correct unless you draw further
items before closer items.). */
glEnable(GL_BLEND);
glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ZERO);
/* Get the view or camera matrix; update the frustum values if needed. */
float viewMat[16], perspective[16];
viewmat_get(viewMat, perspective, viewportID);
glUseProgram(program);
kuhl_errorcheck();
/* Send the perspective projection matrix to the vertex program. */
glUniformMatrix4fv(kuhl_get_uniform("Projection"),
1, // number of 4x4 float matrices
0, // transpose
perspective); // value
float modelMat[16];
get_model_matrix(modelMat);
float modelview[16];
mat4f_mult_mat4f_new(modelview, viewMat, modelMat); // modelview = view * model
/* Send the modelview matrix to the vertex program. */
glUniformMatrix4fv(kuhl_get_uniform("ModelView"),
1, // number of 4x4 float matrices
0, // transpose
modelview); // value
glUniform1i(kuhl_get_uniform("renderStyle"), renderStyle);
// Copy far plane value into vertex program so we can render depth buffer.
float f[6]; // left, right, bottom, top, near>0, far>0
projmat_get_frustum(f, viewport[2], viewport[3]);
glUniform1f(kuhl_get_uniform("farPlane"), f[5]);
kuhl_errorcheck();
kuhl_geometry_draw(modelgeom); /* Draw the model */
kuhl_errorcheck();
if(showOrigin)
{
/* Save current line width */
GLfloat origLineWidth;
glGetFloatv(GL_LINE_WIDTH, &origLineWidth);
glLineWidth(4); // make lines thick
/* Object coordinate system origin */
kuhl_geometry_draw(origingeom); /* Draw the origin marker */
/* World coordinate origin */
mat4f_copy(modelview, viewMat);
glUniformMatrix4fv(kuhl_get_uniform("ModelView"),
1, // number of 4x4 float matrices
0, // transpose
modelview); // value
kuhl_geometry_draw(origingeom); /* Draw the origin marker */
/* Restore line width */
glLineWidth(origLineWidth);
}
if(dgr_is_enabled() == 0 || dgr_is_master())
{
/* The shape of the frames per second quad depends on the
* aspect ratio of the label texture and the aspect ratio of
* the window (because we are placing the quad in normalized
* device coordinates). */
int windowWidth, windowHeight;
viewmat_window_size(&windowWidth, &windowHeight);
float windowAspect = windowWidth / (float)windowHeight;
float stretchLabel[16];
mat4f_scale_new(stretchLabel, 1/8.0 * fpsLabelAspectRatio / windowAspect, 1/8.0, 1);
/* Position label in the upper left corner of the screen */
float transLabel[16];
mat4f_translate_new(transLabel, -.9, .8, 0);
mat4f_mult_mat4f_new(modelview, transLabel, stretchLabel);
glUniformMatrix4fv(kuhl_get_uniform("ModelView"), 1, 0, modelview);
/* Make sure we don't use a projection matrix */
float identity[16];
mat4f_identity(identity);
glUniformMatrix4fv(kuhl_get_uniform("Projection"), 1, 0, identity);
/* Don't use depth testing and make sure we use the texture
* rendering style */
glDisable(GL_DEPTH_TEST);
glUniform1i(kuhl_get_uniform("renderStyle"), 1);
kuhl_geometry_draw(&labelQuad); /* Draw the quad */
glEnable(GL_DEPTH_TEST);
kuhl_errorcheck();
}
glUseProgram(0); // stop using a GLSL program.
} // finish viewport loop
viewmat_end_frame();
/* Update the model for the next frame based on the time. We
* convert the time to seconds and then use mod to cause the
* animation to repeat. */
int time = glutGet(GLUT_ELAPSED_TIME);
dgr_setget("time", &time, sizeof(int));
kuhl_update_model(modelgeom, 0, ((time%10000)/1000.0));
/* Check for errors. If there are errors, consider adding more
* calls to kuhl_errorcheck() in your code. */
kuhl_errorcheck();
//kuhl_video_record("videoout", 30);
/* Ask GLUT to call display() again. We shouldn't call display()
* ourselves recursively because it will not leave time for GLUT
* to call other callback functions for when a key is pressed, the
* window is resized, etc. */
glutPostRedisplay();
}
/* Called by GLUT whenever the window needs to be redrawn. This
* function should not be called directly by the programmer. Instead,
* we can call glutPostRedisplay() to request that GLUT call display()
* at some point. */
void display()
{
/* If we are using DGR, send or receive data to keep multiple
* processes/computers synchronized. */
dgr_update();
/* Render the scene once for each viewport. Frequently one
* viewport will fill the entire screen. However, this loop will
* run twice for HMDs (once for the left eye and once for the
* right. */
viewmat_begin_frame();
for(int viewportID=0; viewportID<viewmat_num_viewports(); viewportID++)
{
viewmat_begin_eye(viewportID);
/* Where is the viewport that we are drawing onto and what is its size? */
int viewport[4]; // x,y of lower left corner, width, height
viewmat_get_viewport(viewport, viewportID);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
/* Clear the current viewport. Without glScissor(), glClear()
* clears the entire screen. We could call glClear() before
* this viewport loop---but on order for all variations of
* this code to work (Oculus support, etc), we can only draw
* after viewmat_begin_eye(). */
glScissor(viewport[0], viewport[1], viewport[2], viewport[3]);
glEnable(GL_SCISSOR_TEST);
glClearColor(.2,.2,.2,0); // set clear color to grey
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glDisable(GL_SCISSOR_TEST);
glEnable(GL_DEPTH_TEST); // turn on depth testing
kuhl_errorcheck();
/* Turn on blending (note, if you are using transparent textures,
the transparency may not look correct unless you draw further
items before closer items. This program always draws the
geometry in the same order.). */
glEnable(GL_BLEND);
glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ZERO);
/* Get the view or camera matrix; update the frustum values if needed. */
float viewMat[16], perspective[16];
viewmat_eye eye = viewmat_get(viewMat, perspective, viewportID);
/* Always put camera at origin (no translation, no
* interpupillary distance). */
float noTranslation[4] = {0,0,0,1};
mat4f_setColumn(viewMat, noTranslation, 3); // last column
/* Create a scale matrix. */
float scaleMatrix[16];
mat4f_scale_new(scaleMatrix, 20, 20, 20);
// Modelview = (viewMatrix * scaleMatrix) * rotationMatrix
float modelview[16];
mat4f_mult_mat4f_new(modelview, viewMat, scaleMatrix);
kuhl_errorcheck();
glUseProgram(program);
kuhl_errorcheck();
/* Send the perspective projection matrix to the vertex program. */
glUniformMatrix4fv(kuhl_get_uniform("Projection"),
1, // number of 4x4 float matrices
0, // transpose
perspective); // value
/* Send the modelview matrix to the vertex program. */
glUniformMatrix4fv(kuhl_get_uniform("ModelView"),
1, // number of 4x4 float matrices
0, // transpose
modelview); // value
kuhl_errorcheck();
if(texIdLeft != 0 && texIdRight != 0) // cylinder
{
/* Draw the cylinder with the appropriate texture */
if(eye == VIEWMAT_EYE_RIGHT)
kuhl_geometry_texture(&cylinder, texIdRight, "tex", KG_WARN);
else
kuhl_geometry_texture(&cylinder, texIdLeft, "tex", KG_WARN);
kuhl_geometry_draw(&cylinder);
}
else // cubemap
{
if(eye == VIEWMAT_EYE_RIGHT)
setupCubemap(cubemapRightTex, quad, modelview);
else
setupCubemap(cubemapLeftTex, quad, modelview);
}
} // finish viewport loop
viewmat_end_frame();
/* Check for errors. If there are errors, consider adding more
* calls to kuhl_errorcheck() in your code. */
kuhl_errorcheck();
/* Ask GLUT to call display() again. We shouldn't call display()
* ourselves recursively because it will not leave time for GLUT
* to call other callback functions for when a key is pressed, the
* window is resized, etc. */
glutPostRedisplay();
static int fps_state_init = 0;
static kuhl_fps_state fps_state;
if(fps_state_init == 0)
{
kuhl_getfps_init(&fps_state);
fps_state_init = 1;
}
float fps = kuhl_getfps(&fps_state);
if(fps_state.frame == 0)
msg(INFO, "fps: %6.1f\n", fps);
}
void display()
{
dgr_update();
dgr_setget("style", &renderStyle, sizeof(int));
// Clear the screen to black, clear the depth buffer
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST); // turn on depth testing
kuhl_errorcheck();
/* Turn on blending (note, if you are using transparent textures,
the transparency may not look correct unless you draw further
items before closer items.). */
glEnable(GL_BLEND);
glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ZERO);
/* Render the scene once for each viewport. Frequently one
* viewport will fill the entire screen. However, this loop will
* run twice for HMDs (once for the left eye and once for the
* right. */
for(int viewportID=0; viewportID<viewmat_num_viewports(); viewportID++)
{
/* Where is the viewport that we are drawing onto and what is its size? */
int viewport[4]; // x,y of lower left corner, width, height
viewmat_get_viewport(viewport, viewportID);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
/* Get the frustum information which will be later used to generate a perspective projection matrix. */
float f[6]; // left, right, top, bottom, near>0, far>0
projmat_get_frustum(f, viewport[2], viewport[3]);
/* Get the view or camera matrix; update the frustum values if needed. */
float viewMat[16];
viewmat_get(viewMat, f, viewportID);
glUseProgram(program);
/* Communicate matricies to OpenGL */
float perspective[16];
mat4f_frustum_new(perspective,f[0], f[1], f[2], f[3], f[4], f[5]);
glUniformMatrix4fv(kuhl_get_uniform("Projection"),
1, // count
0, // transpose
perspective); // value
float modelMat[16];
get_model_matrix(modelMat);
// modelview = view * model
float modelview[16];
mat4f_mult_mat4f_new(modelview, viewMat, modelMat);
glUniformMatrix4fv(kuhl_get_uniform("ModelView"),
1, // count
0, // transpose
modelview); // value
glUniform1i(kuhl_get_uniform("renderStyle"), renderStyle);
// Copy far plane value into vertex program so we can render depth buffer.
glUniform1f(kuhl_get_uniform("farPlane"), f[5]);
kuhl_errorcheck();
kuhl_draw_model_file_ogl3(modelFilename, modelTexturePath, program);
kuhl_errorcheck();
glUseProgram(0); // stop using a GLSL program.
} // finish viewport loop
int time = glutGet(GLUT_ELAPSED_TIME);
float fps = kuhl_getfps(time);
if(time % 1000 == 0)
printf("Frames per second: %0.1f\n", fps);
/* Check for errors. If there are errors, consider adding more
* calls to kuhl_errorcheck() in your code. */
kuhl_errorcheck();
glFlush();
glFinish();
/* Display the buffer we just drew (necessary for double buffering). */
glutSwapBuffers();
// kuhl_video_record("videoout", 30);
/* Ask GLUT to call display() again. We shouldn't call display()
* ourselves recursively because it will not leave time for GLUT
* to call other callback functions for when a key is pressed, the
* window is resized, etc. */
glutPostRedisplay();
}
/** Called by GLUT whenever the window needs to be redrawn. This
* function should not be called directly by the programmer. Instead,
* we can call glutPostRedisplay() to request that GLUT call display()
* at some point. */
void display()
{
/* If we are using DGR, send or receive data to keep multiple
* processes/computers synchronized. */
dgr_update();
/* Get current frames per second calculations. */
float fps = kuhl_getfps(&fps_state);
if(dgr_is_enabled() == 0 || dgr_is_master())
{
// If DGR is being used, only display dgr counter if we are
// the master process.
// Check if FPS value was just updated by kuhl_getfps()
if(fps_state.frame == 0)
msg(INFO, "FPS: %0.1f", fps);
}
/* Render the scene once for each viewport. Frequently one
* viewport will fill the entire screen. However, this loop will
* run twice for HMDs (once for the left eye and once for the
* right. */
viewmat_begin_frame();
for(int viewportID=0; viewportID<viewmat_num_viewports(); viewportID++)
{
viewmat_begin_eye(viewportID);
/* Where is the viewport that we are drawing onto and what is its size? */
int viewport[4]; // x,y of lower left corner, width, height
viewmat_get_viewport(viewport, viewportID);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
/* Clear the current viewport. Without glScissor(), glClear()
* clears the entire screen. We could call glClear() before
* this viewport loop---but on order for all variations of
* this code to work (Oculus support, etc), we can only draw
* after viewmat_begin_eye(). */
glScissor(viewport[0], viewport[1], viewport[2], viewport[3]);
glEnable(GL_SCISSOR_TEST);
glClearColor(.2,.2,.2,0); // set clear color to grey
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glDisable(GL_SCISSOR_TEST);
glEnable(GL_DEPTH_TEST); // turn on depth testing
kuhl_errorcheck();
/* Turn on blending (note, if you are using transparent textures,
the transparency may not look correct unless you draw further
items before closer items.). */
glEnable(GL_BLEND);
glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ZERO);
/* Get the view or camera matrix; update the frustum values if needed. */
float viewMat[16], perspective[16];
viewmat_get(viewMat, perspective, viewportID);
glUseProgram(program);
kuhl_errorcheck();
/* Send the perspective projection matrix to the vertex program. */
glUniformMatrix4fv(kuhl_get_uniform("Projection"),
1, // number of 4x4 float matrices
0, // transpose
perspective); // value
for(int i=1; i<global_argc; i++)
drawObject(i, viewMat);
glUseProgram(0); // stop using a GLSL program.
} // finish viewport loop
viewmat_end_frame();
/* Update the model for the next frame based on the time. We
* convert the time to seconds and then use mod to cause the
* animation to repeat. */
int time = glutGet(GLUT_ELAPSED_TIME);
dgr_setget("time", &time, sizeof(int));
kuhl_update_model(modelgeom, 0, ((time%10000)/1000.0));
/* Check for errors. If there are errors, consider adding more
* calls to kuhl_errorcheck() in your code. */
kuhl_errorcheck();
//kuhl_video_record("videoout", 30);
/* Ask GLUT to call display() again. We shouldn't call display()
* ourselves recursively because it will not leave time for GLUT
* to call other callback functions for when a key is pressed, the
* window is resized, etc. */
glutPostRedisplay();
}
