b2dGetImageHeight

Queries image height in pixels (returns full texture height, not frame height for anim images). Takes imageHandle (image handle from b2dLoadImage/b2dLoadAnimImage, positive integer). Returns height in pixels (positive integer, 0 if handle invalid). Reads image.height from g_images map (original texture dimensions from file). Use to query dimensions (layout calculations, collision detection, scaling), center images (calculate position offset), or validate sizes (check image loaded correctly). Return behavior: returns height if found (positive integer, original file height), returns 0 if invalid (handle not found in g_images map, invalid handle), read-only query (doesn't modify image, safe to call anytime). Use cases: (1) Center image (y = screenHeight/2 - b2dGetImageHeight(img)/2: center vertically), (2) Bounds check (If mouseY < imgY + b2dGetImageHeight(img) Then inside image), (3) Layout (nextY = y + b2dGetImageHeight(img) + spacing: position next element), (4) Scale (scale = targetHeight / b2dGetImageHeight(img): calculate scale factor). Common patterns: query = h = b2dGetImageHeight(img): use height for calculations; center = y - h/2. Animation sheets: returns full sheet height (NOT frame height, use stored frameHeight for individual frames), example (256x128 sheet with 64x64 frames returns 128, not 64). Performance: query cost zero (map lookup and integer read, trivial CPU operation), safe to call every frame (no GPU cost, read-only operation). Related: b2dGetImageWidth queries width (returns full texture width in pixels), b2dLoadImage loads image (creates image queried by this function), b2dLoadAnimImage loads animation sheet (returns full sheet height, not frame height).