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(svn r20944) -Codechange: Bail out early in DrawBridgePillars(). (uni657)

This commit is contained in:
frosch 2010-10-16 15:35:32 +00:00
parent 58ed553068
commit 3866d8e2d1
1 changed files with 32 additions and 33 deletions
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65
src/tunnelbridge_cmd.cpp
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@ -845,45 +845,44 @@ static void DrawBridgePillars(const PalSpriteID *psid, const TileInfo *ti, Axis
static const int back_pillar_offset[2] = { 0, 9}; ///< sprite position offset of back facing pillar
SpriteID image = psid->sprite;
if (image == 0) return;
if (image != 0) {
/* "side" specifies the side the pillars stand on.
* The length of the pillars is then set to the height of the bridge over the corners of this edge.
*
* axis==AXIS_X axis==AXIS_Y
* side==false SW NW
* side==true NE SE
*
* I have no clue, why this was done this way.
*/
bool side = HasBit(image, 0);
/* "side" specifies the side the pillars stand on.
* The length of the pillars is then set to the height of the bridge over the corners of this edge.
*
* axis==AXIS_X axis==AXIS_Y
* side==false SW NW
* side==true NE SE
*
* I have no clue, why this was done this way.
*/
bool side = HasBit(image, 0);
/* "dir" means the edge the pillars stand on */
DiagDirection dir = AxisToDiagDir(axis);
if (side != (axis == AXIS_Y)) dir = ReverseDiagDir(dir);
/* "dir" means the edge the pillars stand on */
DiagDirection dir = AxisToDiagDir(axis);
if (side != (axis == AXIS_Y)) dir = ReverseDiagDir(dir);
/* Determine ground height under pillars */
int front_height = ti->z;
int back_height = ti->z;
GetSlopeZOnEdge(ti->tileh, dir, &front_height, &back_height);
/* Determine ground height under pillars */
int front_height = ti->z;
int back_height = ti->z;
GetSlopeZOnEdge(ti->tileh, dir, &front_height, &back_height);
/* x and y size of bounding-box of pillars */
int w = bounding_box_size[axis];
int h = bounding_box_size[OtherAxis(axis)];
/* sprite position of back facing pillar */
int x_back = x - back_pillar_offset[axis];
int y_back = y - back_pillar_offset[OtherAxis(axis)];
/* x and y size of bounding-box of pillars */
int w = bounding_box_size[axis];
int h = bounding_box_size[OtherAxis(axis)];
/* sprite position of back facing pillar */
int x_back = x - back_pillar_offset[axis];
int y_back = y - back_pillar_offset[OtherAxis(axis)];
for (int cur_z = z_bridge; cur_z >= front_height || cur_z >= back_height; cur_z -= TILE_HEIGHT) {
/* Draw front facing pillar */
if (cur_z >= front_height) {
AddSortableSpriteToDraw(image, psid->pal, x, y, w, h, BB_HEIGHT_UNDER_BRIDGE - PILLAR_Z_OFFSET, cur_z, IsTransparencySet(TO_BRIDGES), 0, 0, -PILLAR_Z_OFFSET);
}
for (int cur_z = z_bridge; cur_z >= front_height || cur_z >= back_height; cur_z -= TILE_HEIGHT) {
/* Draw front facing pillar */
if (cur_z >= front_height) {
AddSortableSpriteToDraw(image, psid->pal, x, y, w, h, BB_HEIGHT_UNDER_BRIDGE - PILLAR_Z_OFFSET, cur_z, IsTransparencySet(TO_BRIDGES), 0, 0, -PILLAR_Z_OFFSET);
}
/* Draw back facing pillar, but not the highest part directly under the bridge-floor */
if (drawfarpillar && cur_z >= back_height && cur_z < z_bridge - (int)TILE_HEIGHT) {
AddSortableSpriteToDraw(image, psid->pal, x_back, y_back, w, h, BB_HEIGHT_UNDER_BRIDGE - PILLAR_Z_OFFSET, cur_z, IsTransparencySet(TO_BRIDGES), 0, 0, -PILLAR_Z_OFFSET);
}
/* Draw back facing pillar, but not the highest part directly under the bridge-floor */
if (drawfarpillar && cur_z >= back_height && cur_z < z_bridge - (int)TILE_HEIGHT) {
AddSortableSpriteToDraw(image, psid->pal, x_back, y_back, w, h, BB_HEIGHT_UNDER_BRIDGE - PILLAR_Z_OFFSET, cur_z, IsTransparencySet(TO_BRIDGES), 0, 0, -PILLAR_Z_OFFSET);
}
}
}