/* Called by GLUT whenever a key is pressed. */
void keyboard(unsigned char key, int x, int y)
{
switch(key)
{
case 'q':
case 'Q':
case 27: // ASCII code for Escape key
exit(0);
break;
case 'r':
{
int origProgram = program;
program = kuhl_create_program(GLSL_VERT_FILE, GLSL_FRAG_FILE);
kuhl_delete_program(origProgram);
break;
}
case ' ':
renderStyle++;
if(renderStyle > 7)
renderStyle = 0;
switch(renderStyle)
{
case 0: printf("Render style: Diffuse (headlamp light)\n"); break;
case 1: printf("Render style: Texture\n"); break;
case 2: printf("Render style: Vertex color\n"); break;
case 3: printf("Render style: Normals\n"); break;
case 4: printf("Render style: Texture coordinates\n"); break;
case 5: printf("Render style: Front (green) and back (red) faces based on winding\n"); break;
case 6: printf("Render style: Front (green) and back (red) based on normals\n"); break;
case 7: printf("Render style: Depth (white=far; black=close)\n"); break;
}
break;
}
/* Whenever any key is pressed, request that display() get
* called. */
glutPostRedisplay();
}
/* Called by GLUT whenever a key is pressed. */
void keyboard(unsigned char key, int x, int y)
{
switch(key)
{
case 'q':
case 'Q':
case 27: // ASCII code for Escape key
dgr_exit();
exit(EXIT_SUCCESS);
break;
case 'f': // full screen
glutFullScreen();
break;
case 'F': // switch to window from full screen mode
glutPositionWindow(0,0);
break;
case 'r':
{
// Reload GLSL program from disk
kuhl_delete_program(program);
program = kuhl_create_program(GLSL_VERT_FILE, GLSL_FRAG_FILE);
/* Apply the program to the model geometry */
kuhl_geometry_program(modelgeom, program, KG_FULL_LIST);
/* and the fps label*/
kuhl_geometry_program(&labelQuad, program, KG_FULL_LIST);
break;
}
case 'w':
{
// Toggle between wireframe and solid
int polygonMode;
glGetIntegerv(GL_POLYGON_MODE, &polygonMode);
if(polygonMode == GL_LINE)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
else
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
break;
}
case 'p':
{
// Toggle between points and solid
int polygonMode;
glGetIntegerv(GL_POLYGON_MODE, &polygonMode);
if(polygonMode == GL_POINT)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
else
glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
break;
}
case 'c':
{
// Toggle front, back, and no culling
int cullMode;
glGetIntegerv(GL_CULL_FACE_MODE, &cullMode);
if(glIsEnabled(GL_CULL_FACE))
{
if(cullMode == GL_FRONT)
{
glCullFace(GL_BACK);
printf("Culling: Culling back faces; drawing front faces\n");
}
else
{
glDisable(GL_CULL_FACE);
printf("Culling: No culling; drawing all faces.\n");
}
}
else
{
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
printf("Culling: Culling front faces; drawing back faces\n");
}
kuhl_errorcheck();
break;
}
case '+': // increase size of points and width of lines
{
GLfloat currentPtSize;
GLfloat sizeRange[2];
glGetFloatv(GL_POINT_SIZE, ¤tPtSize);
glGetFloatv(GL_SMOOTH_POINT_SIZE_RANGE, sizeRange);
GLfloat temp = currentPtSize+1;
if(temp > sizeRange[1])
temp = sizeRange[1];
glPointSize(temp);
printf("Point size is %f (can be between %f and %f)\n", temp, sizeRange[0], sizeRange[1]);
kuhl_errorcheck();
GLfloat currentLineWidth;
GLfloat widthRange[2];
glGetFloatv(GL_LINE_WIDTH, ¤tLineWidth);
glGetFloatv(GL_SMOOTH_LINE_WIDTH_RANGE, widthRange);
temp = currentLineWidth+1;
if(temp > widthRange[1])
temp = widthRange[1];
glLineWidth(temp);
printf("Line width is %f (can be between %f and %f)\n", temp, widthRange[0], widthRange[1]);
kuhl_errorcheck();
break;
}
case '-': // decrease size of points and width of lines
{
GLfloat currentPtSize;
GLfloat sizeRange[2];
glGetFloatv(GL_POINT_SIZE, ¤tPtSize);
glGetFloatv(GL_SMOOTH_POINT_SIZE_RANGE, sizeRange);
GLfloat temp = currentPtSize-1;
if(temp < sizeRange[0])
temp = sizeRange[0];
glPointSize(temp);
printf("Point size is %f (can be between %f and %f)\n", temp, sizeRange[0], sizeRange[1]);
kuhl_errorcheck();
GLfloat currentLineWidth;
GLfloat widthRange[2];
glGetFloatv(GL_LINE_WIDTH, ¤tLineWidth);
glGetFloatv(GL_SMOOTH_LINE_WIDTH_RANGE, widthRange);
temp = currentLineWidth-1;
if(temp < widthRange[0])
temp = widthRange[0];
glLineWidth(temp);
printf("Line width is %f (can be between %f and %f)\n", temp, widthRange[0], widthRange[1]);
kuhl_errorcheck();
break;
}
case ' ': // Toggle different sections of the GLSL fragment shader
renderStyle++;
if(renderStyle > 9)
renderStyle = 0;
switch(renderStyle)
{
case 0: printf("Render style: Diffuse (headlamp light)\n"); break;
case 1: printf("Render style: Texture (color is used on non-textured geometry)\n"); break;
case 2: printf("Render style: Texture+diffuse (color is used on non-textured geometry)\n"); break;
case 3: printf("Render style: Vertex color\n"); break;
case 4: printf("Render style: Vertex color + diffuse (headlamp light)\n"); break;
case 5: printf("Render style: Normals\n"); break;
case 6: printf("Render style: Texture coordinates\n"); break;
case 7: printf("Render style: Front (green) and back (red) faces based on winding\n"); break;
case 8: printf("Render style: Front (green) and back (red) based on normals\n"); break;
case 9: printf("Render style: Depth (white=far; black=close)\n"); break;
}
break;
}
/* Whenever any key is pressed, request that display() get
* called. */
glutPostRedisplay();
}
