diff options
Diffstat (limited to 'balls.cl')
| -rw-r--r-- | balls.cl | 22 |
1 files changed, 12 insertions, 10 deletions
@@ -1,17 +1,19 @@ #define RADIUS 0.15f __kernel void -balls(__global float2 *position, __global float2 *vertices) { - size_t id, nsegs; +balls(__global float2 *positions, __global float2 *vertices) { + size_t ball, nsegs; + float2 center; float theta; - /* Center of circle. */ - vertices[0].x = position[0].x; - vertices[0].y = position[0].y; + ball = get_group_id(0); + center = positions[ball]; - id = get_global_id(0); - nsegs = get_global_size(0)-1; - theta = 2.0f * M_PI_F * id / nsegs; - vertices[id+1].x = position[0].x + RADIUS * cos(theta); - vertices[id+1].y = position[0].y + RADIUS * sin(theta); + nsegs = get_local_size(0)-2; /* Number of edge segments. */ + theta = 2.0f * M_PI_F * get_local_id(0) / nsegs; + + vertices[get_global_id(0)].x = center.x + RADIUS * cos(theta); + vertices[get_global_id(0)].y = center.y + RADIUS * sin(theta); + + vertices[ball*get_local_size(0)] = center; } |