Vector RenderableView::GetScreenPoint(const Vector& p) const
{
float distance = m_WindowSize / 2.0f / (float)tan( m_FieldOfView/2.0f );
Matrix matrix = Matrix::translation(-m_Target);
matrix.preMultiplication(m_Orientation.inverse().buildMatrix());
matrix.preMultiplication(Matrix::translation(0.0f, 0.0f, -distance));
Vector result = matrix*p;
result[0] = result[0] * distance / -result[2];
result[1] = result[1] * distance / -result[2];
result[2] = 0.0;
result[3] = 1.0;
result[0] = result[0] / (m_WindowSize / (m_Height<m_Width?m_Height: m_Width));
result[1] = result[1] / (m_WindowSize / (m_Height<m_Width?m_Height: m_Width));
result[0] = (float)result[0]+(float)m_Width/2.0f;
result[1] = (float)result[1]+(float)m_Height/2.0f;
result[1] = InvertY(result[1]);
return result;
}
/*
* DrawSceneOutline()
* - draws scene outline within main drawing area
*
* PARAMETERS
* data - pointer to MyProgram structure
*
* RETURNS
* nothing
*/
void
DrawSceneOutline(MyProgram *data)
{
XPoint points[5];
points[0].x = DEFAULT_SCENE_BOT_LEFT_X;
points[0].y = InvertY(DEFAULT_SCENE_BOT_LEFT_Y);
points[1].x = DEFAULT_SCENE_BOT_LEFT_X;
points[1].y = InvertY(DEFAULT_SCENE_TOP_RIGHT_Y);
points[2].x = DEFAULT_SCENE_TOP_RIGHT_X;
points[2].y = InvertY(DEFAULT_SCENE_TOP_RIGHT_Y);
points[3].x = DEFAULT_SCENE_TOP_RIGHT_X;
points[3].y = InvertY(DEFAULT_SCENE_BOT_LEFT_Y);
points[4].x = DEFAULT_SCENE_BOT_LEFT_X;
points[4].y = InvertY(DEFAULT_SCENE_BOT_LEFT_Y);
DrawPolyline( &points[0], 5 );
}
/*
* DrawSceneTextArea()
* - updates scene text area within main drawing area
*
* PARAMETERS
* data - pointer to MyProgram structure
*
* RETURNS
* nothing
*/
void
DrawSceneTextArea(MyProgram *data)
{
pointType left_pt, right_pt;
int height;
XFont font;
int vert_spacing, text_offset;
font = GetWidgetFont( data->draw_area_widget );
height = FontHeight( font );
vert_spacing = 2 * DEFAULT_SCENE_TEXT_SPACING;
text_offset = DEFAULT_SCENE_TEXT_SPACING;
left_pt.x = DEFAULT_SCENE_BOT_LEFT_X;
left_pt.y = height + DEFAULT_SCENE_BOT_LEFT_Y + vert_spacing;
right_pt.x = DEFAULT_SCENE_TOP_RIGHT_X;
right_pt.y = left_pt.y;
DrawLine( left_pt.x, InvertY(left_pt.y), right_pt.x, InvertY(right_pt.y) );
DrawText( "Sound:", (left_pt.x+text_offset),
InvertY((left_pt.y-text_offset-height)) );
left_pt.y += (height + vert_spacing);
right_pt.y = left_pt.y;
DrawLine( left_pt.x, InvertY(left_pt.y), right_pt.x, InvertY(right_pt.y) );
DrawText( "Dialog:", (left_pt.x+text_offset),
InvertY((left_pt.y-text_offset-height)) );
left_pt.y += (height + vert_spacing);
right_pt.y = left_pt.y;
DrawLine( left_pt.x, InvertY(left_pt.y), right_pt.x, InvertY(right_pt.y) );
DrawText( "Action:", (left_pt.x+text_offset),
InvertY((left_pt.y-text_offset-height)) );
}
Ray OrthographicView::GetPickRay(int x, int y) const
{
y = InvertY(y);
float fx = (float)x-(float)m_Width/2.0f;
float fy = (float)y-(float)m_Height/2.0f;
float objectDx = fx * m_WindowSize / (m_Height<m_Width?m_Height: m_Width);
float objectDy = fy * m_WindowSize / (m_Height<m_Width?m_Height: m_Width);
Matrix matrix = Matrix::translation(0.0f, 0.0f, 200.0f);
matrix.preMultiplication(m_Orientation.buildMatrix());
matrix.preMultiplication(Matrix::translation(m_Target));
return Ray(matrix*Vector(objectDx,objectDy,0.0f,1.0f), matrix*Vector(0.0f,0.0f,-1.0f,0.0f));
}
/***********************************************************************
DrawLinks() - this function draws the current link hierarchy as stated
in the data structure 'data'.
***********************************************************************/
int
DrawLinks(MyProgram *data)
{
int i;
if (data->redraw == TRUE)
SetDrawMode(SANE_XOR);
/* draw each link
*/
for (i = 0; i < data->num_links; i++)
DrawLine(data->links[i].start.x, InvertY(data->links[i].start.y),
data->links[i].visend.x, InvertY(data->links[i].visend.y));
/* draw end effector
*/
switch(data->end_effect.type) {
case ENDEFF_SQUARE:
DrawFilledBox(data->end_effect.center.x,
InvertY(data->end_effect.center.y),
ENDEFF_SIZE, ENDEFF_SIZE);
break;
case ENDEFF_CIRCLE:
DrawFilledArc(data->end_effect.center.x,
InvertY(data->end_effect.center.y),
ENDEFF_SIZE, ENDEFF_SIZE, 0, 360);
break;
case ENDEFF_TRIANGLE:
break;
default:
break;
}
SetDrawMode(GXcopy);
return(0);
} /* end of DrawLinks() */
Ray RenderableView::GetPickRay(int x, int y) const
{
y = InvertY(y);
float fx = (float)x-(float)m_Width/2.0f;
float fy = (float)y-(float)m_Height/2.0f;
float objectDx = fx * m_WindowSize / (m_Height<m_Width?m_Height: m_Width);
float objectDy = fy * m_WindowSize / (m_Height<m_Width?m_Height: m_Width);
float distance;
distance = m_WindowSize / 2.0f / (float)tan( m_FieldOfView/2.0f );
Matrix matrix = Matrix::translation(0.0f, 0.0f, distance);
matrix.preMultiplication(m_Orientation.buildMatrix());
matrix.preMultiplication(Matrix::translation(m_Target));
return Ray(matrix*Vector(0.0f,0.0f,0.0f,1.0f), matrix*Vector(objectDx,objectDy,-distance,0.0f));
}
/***********************************************************************
HandleButton() - this function determines if the end effector of the
structure has been grabbed or not.
***********************************************************************/
int
HandleButton(MyProgram *data)
{
pointType curr_p;
curr_p.x = data->curr_mousx;
curr_p.y = InvertY(data->curr_mousy);
if (data->button_state == BUTTON_DOWN) /* check if actually grabbed */
if (PointInBox(curr_p, data->end_effect.extent) == TRUE) {
data->endgrabbed = TRUE;
printf("end effector was grabbed\n");
}
else
data->endgrabbed = FALSE;
else
return(1); /* error, unknown button state */
return(0);
} /* end of HandleButton() */
/*
* DrawHeader()
* - draws header label within main drawing area
*
* PARAMETERS
* data - pointer to MyProgram structure
*
* RETURNS
* nothing
*/
void
DrawHeader(MyProgram *data)
{
pointType label_pos;
int width, height;
XFont font;
font = GetWidgetFont( data->draw_area_widget );
height = FontHeight( font );
label_pos.x = DEFAULT_PROJ_LABEL_X;
label_pos.y = DEFAULT_PROJ_LABEL_y;
DrawText("Project:", label_pos.x, InvertY(label_pos.y));
width = TextWidth( font, "Project:" );
label_pos.x += (width + DEFAULT_LABEL_SPACING1);
DrawText(data->proj.projname_str, label_pos.x, InvertY(label_pos.y));
width = TextWidth( font, data->proj.projname_str );
label_pos.x += (width + DEFAULT_LABEL_SPACING2);
DrawText("Act:", label_pos.x, InvertY(label_pos.y));
width = TextWidth( font, "Act:" );
label_pos.x += (width + DEFAULT_LABEL_SPACING1);
DrawText("1", label_pos.x, InvertY(label_pos.y));
width = TextWidth( font, "1" );
label_pos.x += (width + DEFAULT_LABEL_SPACING2);
DrawText("Scene:", label_pos.x, InvertY(label_pos.y));
width = TextWidth( font, "Scene:" );
label_pos.x += (width + DEFAULT_LABEL_SPACING1);
DrawText("1", label_pos.x, InvertY(label_pos.y));
}