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| author | Paramat <paramat@users.noreply.github.com> | 2017-08-26 07:43:50 +0100 |
|---|---|---|
| committer | Loïc Blot <nerzhul@users.noreply.github.com> | 2017-08-26 08:43:50 +0200 |
| commit | e55aeec2e24c4bf4e91d7755e8b01c511999dd92 (patch) | |
| tree | 1101e854e1e6eaff83c94d9fa74de57204025636 /src/mapgen_fractal.cpp | |
| parent | 096ea031de5bdb3e51d2ceb12e6b7e2f2053081e (diff) | |
| download | minetest-e55aeec2e24c4bf4e91d7755e8b01c511999dd92.tar.gz minetest-e55aeec2e24c4bf4e91d7755e8b01c511999dd92.tar.bz2 minetest-e55aeec2e24c4bf4e91d7755e8b01c511999dd92.zip | |
Mgfractal: Use 'switch case' instead of 'if else' (#6314)
Diffstat (limited to 'src/mapgen_fractal.cpp')
| -rw-r--r-- | src/mapgen_fractal.cpp | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/src/mapgen_fractal.cpp b/src/mapgen_fractal.cpp index 3663599a5..50cb93d8c 100644 --- a/src/mapgen_fractal.cpp +++ b/src/mapgen_fractal.cpp @@ -268,32 +268,38 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z) float nw = 0.0f; for (u16 iter = 0; iter < iterations; iter++) { - - if (formula == 1) { // 4D "Roundy" + switch (formula) { + default: + case 1: // 4D "Roundy" nx = ox * ox - oy * oy - oz * oz - ow * ow + cx; ny = 2.0f * (ox * oy + oz * ow) + cy; nz = 2.0f * (ox * oz + oy * ow) + cz; nw = 2.0f * (ox * ow + oy * oz) + cw; - } else if (formula == 2) { // 4D "Squarry" + break; + case 2: // 4D "Squarry" nx = ox * ox - oy * oy - oz * oz - ow * ow + cx; ny = 2.0f * (ox * oy + oz * ow) + cy; nz = 2.0f * (ox * oz + oy * ow) + cz; nw = 2.0f * (ox * ow - oy * oz) + cw; - } else if (formula == 3) { // 4D "Mandy Cousin" + break; + case 3: // 4D "Mandy Cousin" nx = ox * ox - oy * oy - oz * oz + ow * ow + cx; ny = 2.0f * (ox * oy + oz * ow) + cy; nz = 2.0f * (ox * oz + oy * ow) + cz; nw = 2.0f * (ox * ow + oy * oz) + cw; - } else if (formula == 4) { // 4D "Variation" + break; + case 4: // 4D "Variation" nx = ox * ox - oy * oy - oz * oz - ow * ow + cx; ny = 2.0f * (ox * oy + oz * ow) + cy; nz = 2.0f * (ox * oz - oy * ow) + cz; nw = 2.0f * (ox * ow + oy * oz) + cw; - } else if (formula == 5) { // 3D "Mandelbrot/Mandelbar" + break; + case 5: // 3D "Mandelbrot/Mandelbar" nx = ox * ox - oy * oy - oz * oz + cx; ny = 2.0f * ox * oy + cy; nz = -2.0f * ox * oz + cz; - } else if (formula == 6) { // 3D "Christmas Tree" + break; + case 6: // 3D "Christmas Tree" // Altering the formula here is necessary to avoid division by zero if (fabs(oz) < 0.000000001f) { nx = ox * ox - oy * oy - oz * oz + cx; @@ -305,7 +311,8 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z) ny = a * (oy * oy - oz * oz) + cy; nz = a * 2.0f * oy * oz + cz; } - } else if (formula == 7) { // 3D "Mandelbulb" + break; + case 7: // 3D "Mandelbulb" if (fabs(oy) < 0.000000001f) { nx = ox * ox - oz * oz + cx; ny = cy; @@ -316,7 +323,8 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z) ny = 2.0f * ox * oy * a + cy; nz = -2.0f * oz * sqrt(ox * ox + oy * oy) + cz; } - } else if (formula == 8) { // 3D "Cosine Mandelbulb" + break; + case 8: // 3D "Cosine Mandelbulb" if (fabs(oy) < 0.000000001f) { nx = 2.0f * ox * oz + cx; ny = 4.0f * oy * oz + cy; @@ -327,7 +335,8 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z) ny = 2.0f * ox * oy * a + cy; nz = oz * oz - ox * ox - oy * oy + cz; } - } else if (formula == 9) { // 4D "Mandelbulb" + break; + case 9: // 4D "Mandelbulb" float rxy = sqrt(ox * ox + oy * oy); float rxyz = sqrt(ox * ox + oy * oy + oz * oz); if (fabs(ow) < 0.000000001f && fabs(oz) < 0.000000001f) { @@ -343,6 +352,7 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z) nz = -2.0f * rxy * oz * a + cz; nw = 2.0f * rxyz * ow + cw; } + break; } if (nx * nx + ny * ny + nz * nz + nw * nw > 4.0f) |