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| author | Simon Robertshaw <simon@hardwired.org.uk> | 2012-07-25 17:25:37 (GMT) |
|---|---|---|
| committer | Simon Robertshaw <simon@hardwired.org.uk> | 2012-07-25 17:25:37 (GMT) |
| commit | 41cbd69ac807b79919649865293de2af8c50cbf7 (patch) | |
| tree | 66d13f43cfec7d8abdca032c420072a6600605f0 /src/simulation/elements/LIGH.cpp | |
| parent | de4fe1a38ec1114c384ddbb5ab68c7aa22541eed (diff) | |
| download | powder-41cbd69ac807b79919649865293de2af8c50cbf7.zip powder-41cbd69ac807b79919649865293de2af8c50cbf7.tar.gz | |
TPT: Use atan2 for LIGH angle calculations 966f1dcc23
Diffstat (limited to 'src/simulation/elements/LIGH.cpp')
| -rw-r--r-- | src/simulation/elements/LIGH.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/simulation/elements/LIGH.cpp b/src/simulation/elements/LIGH.cpp index 0000f64..d413d29 100644 --- a/src/simulation/elements/LIGH.cpp +++ b/src/simulation/elements/LIGH.cpp @@ -155,15 +155,19 @@ int Element_LIGH::update(UPDATE_FUNC_ARGS) { int t=parts[pNear].type; float n_angle; // angle to nearest part + float angle_diff; rx=parts[pNear].x-x; ry=parts[pNear].y-y; - if (rx*rx+ry*ry!=0) - n_angle = asin(-ry/sqrt(rx*rx+ry*ry)); + if (rx!=0 || ry!=0) + n_angle = atan2f(-ry, rx); else n_angle = 0; if (n_angle<0) n_angle+=M_PI*2; - if (parts[i].life<5 || fabs(n_angle-parts[i].tmp*M_PI/180)<M_PI*0.8) // lightning strike + angle_diff = fabsf(n_angle-parts[i].tmp*M_PI/180); + if (angle_diff>M_PI) + angle_diff = M_PI*2 - angle_diff; + if (parts[i].life<5 || angle_diff<M_PI*0.8) // lightning strike { create_line_par(sim, x, y, x+rx, y+ry, PT_LIGH, parts[i].temp, parts[i].life, parts[i].tmp-90, 0); |