@Override
public int getColor(VisualItem item) {
// highlight border of glyphs for which search is true
// TODO: thicker borders? more outstanding highlighting?
// do (inefficient) manual comparison (for now)
Iterator itemsInGroup = m_vis.getGroup(Visualization.SEARCH_ITEMS).tuples();
while (itemsInGroup.hasNext()) {
Tuple itemInGroup = (Tuple) itemsInGroup.next();
if (item.getString(DocumentGridTable.NODE_NAME)
.equals(itemInGroup.getString(DocumentGridTable.NODE_NAME))) {
// debug
// System.out.println("debug: "+this.getClass().getName()+": item in
// group! "+item.toString());
return ColorLib.rgb(191, 99, 130);
}
}
if (item.isHover()) {
return Color.LIGHT_GRAY.getRGB();
}
// default border color
// return ColorLib.gray(50);
return Color.DARK_GRAY.getRGB();
}
/*
* This method renders the screen, returning an array of the pixels to be displayed to the user
*
*/
public int[] update(Camera camera, int[] pixels) {
for (int i = 0; i < pixels.length / 2; i++) { // Background colouring
if (pixels[i] != Color.DARK_GRAY.getRGB()) {
pixels[i] = Color.DARK_GRAY.getRGB();
}
}
for (int j = pixels.length / 2; j < pixels.length; j++) { // background colouring
if (pixels[j] != Color.gray.getRGB()) {
pixels[j] = Color.gray.getRGB();
}
}
for (int x = 0; x < width; x = x + 1) { // for every column in the screen
double cameraX = 2 * x / (double) (width) - 1; // rendering position
double rayDirX = camera.xDir + camera.xPlane * cameraX; // direction of ray vector
double rayDirY = camera.yDir + camera.yPlane * cameraX; // direction of ray vector
int mapX = (int) camera.xPos; // X-coordinate location on the map
int mapY = (int) camera.yPos; // Y-coordinate location on the map
// length of ray from current position of camera to next side
double distToSideX;
double distToSideY;
// Length of ray from edge to edge
double deltaDistX = Math.sqrt(1 + (rayDirY * rayDirY) / (rayDirX * rayDirX));
double deltaDistY = Math.sqrt(1 + (rayDirX * rayDirX) / (rayDirY * rayDirY));
double perpWallDist;
// Direction
int stepX, stepY;
int lineHeight;
boolean collision = false; // collision flag
int side = 0; // Wall orientation
// Calculate step direction and distance to side of wall
if (rayDirX < 0) {
stepX = -1;
distToSideX = (camera.xPos - mapX) * deltaDistX;
} else {
stepX = 1;
distToSideX = (mapX + 1.0 - camera.xPos) * deltaDistX;
}
if (rayDirY < 0) {
stepY = -1;
distToSideY = (camera.yPos - mapY) * deltaDistY;
} else {
stepY = 1;
distToSideY = (mapY + 1.0 - camera.yPos) * deltaDistY;
}
// Loop to find where the ray collisions a wall
while (!collision) {
// Jump to next square
if (distToSideX < distToSideY) {
distToSideX += deltaDistX;
mapX += stepX;
side = 0;
} else {
distToSideY += deltaDistY;
mapY += stepY;
side = 1;
}
// Check if ray has collision a wall
if (map[mapX][mapY] > 0) collision = true;
}
// Calculate distance to the point of impact
if (side == 0) perpWallDist = Math.abs((mapX - camera.xPos + (1 - stepX) / 2) / rayDirX);
else perpWallDist = Math.abs((mapY - camera.yPos + (1 - stepY) / 2) / rayDirY);
// Now calculate the height of the wall based on the distance from the camera
if (perpWallDist > 0) lineHeight = Math.abs((int) (height / perpWallDist));
else lineHeight = height;
// calculate lowest and highest pixel to fill in current stripe
int drawStart = -lineHeight / 2 + height / 2;
if (drawStart < 0) drawStart = 0;
int drawEnd = lineHeight / 2 + height / 2;
if (drawEnd >= height) drawEnd = height - 1;
// add a texture
int texNum = map[mapX][mapY] - 1;
double wallLocX; // position of collision with wall
if (side == 1) { // Is the wall on the Y axis?
wallLocX = (camera.xPos + ((mapY - camera.yPos + (1 - stepY) / 2) / rayDirY) * rayDirX);
} else { // Is the wall on the X axis?
wallLocX = (camera.yPos + ((mapX - camera.xPos + (1 - stepX) / 2) / rayDirX) * rayDirY);
}
wallLocX -= Math.floor(wallLocX);
// X-coordinate on the texture
int texX = (int) (wallLocX * (textures.get(texNum).SIZE));
if (side == 0 && rayDirX > 0) texX = textures.get(texNum).SIZE - texX - 1;
if (side == 1 && rayDirY < 0) texX = textures.get(texNum).SIZE - texX - 1;
// calculate Y-coordinate on texture
for (int y = drawStart; y < drawEnd; y++) {
int texY = (((y * 2 - height + lineHeight) << 6) / lineHeight) / 2;
int color;
if (side == 0)
color = textures.get(texNum).pixels[texX + (texY * textures.get(texNum).SIZE)];
else
color =
(textures.get(texNum).pixels[texX + (texY * textures.get(texNum).SIZE)] >> 1)
& 8355711; // Make y sides darker
pixels[x + y * (width)] = color;
}
}
return pixels; // return the pixels to be rendered
}