diff options
| -rw-r--r-- | src/tgp.cpp | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/src/tgp.cpp b/src/tgp.cpp index fb835c43c..3cfbe4951 100644 --- a/src/tgp.cpp +++ b/src/tgp.cpp @@ -573,7 +573,7 @@ static void HeightMapSineTransform(height_t h_min, height_t h_max) */ static void HeightMapCurves(uint level) { - height_t mh = TGPGetMaxHeight(); + height_t mh = TGPGetMaxHeight() - I2H(1); // height levels above sea level only /** Basically scale height X to height Y. Everything in between is interpolated. */ struct control_point_t { @@ -582,10 +582,10 @@ static void HeightMapCurves(uint level) }; /* Scaled curve maps; value is in height_ts. */ #define F(fraction) ((height_t)(fraction * mh)) - const control_point_t curve_map_1[] = { { F(0.0), F(0.0) }, { F(0.6 / 3), F(0.1) }, { F(2.4 / 3), F(0.4 / 3) }, { F(1.0), F(0.4) } }; - const control_point_t curve_map_2[] = { { F(0.0), F(0.0) }, { F(0.2 / 3), F(0.1) }, { F(1.6 / 3), F(0.4 / 3) }, { F(2.4 / 3), F(0.8 / 3) }, { F(1.0), F(0.6) } }; - const control_point_t curve_map_3[] = { { F(0.0), F(0.0) }, { F(0.2 / 3), F(0.1) }, { F(1.6 / 3), F(0.8 / 3) }, { F(2.4 / 3), F(1.8 / 3) }, { F(1.0), F(0.8) } }; - const control_point_t curve_map_4[] = { { F(0.0), F(0.0) }, { F(0.2 / 3), F(0.1) }, { F(1.2 / 3), F(0.9 / 3) }, { F(2.0 / 3), F(2.4 / 3) } , { F(5.5 / 6), F(0.99) }, { F(1.0), F(0.99) } }; + const control_point_t curve_map_1[] = { { F(0.0), F(0.0) }, { F(2.4 / 3), F(0.4 / 3) }, { F(1.0), F(0.4) } }; + const control_point_t curve_map_2[] = { { F(0.0), F(0.0) }, { F(1.6 / 3), F(0.4 / 3) }, { F(2.4 / 3), F(0.8 / 3) }, { F(1.0), F(0.6) } }; + const control_point_t curve_map_3[] = { { F(0.0), F(0.0) }, { F(1.6 / 3), F(0.8 / 3) }, { F(2.4 / 3), F(1.8 / 3) }, { F(1.0), F(0.8) } }; + const control_point_t curve_map_4[] = { { F(0.0), F(0.0) }, { F(1.2 / 3), F(0.9 / 3) }, { F(2.0 / 3), F(2.4 / 3) } , { F(5.5 / 6), F(0.99) }, { F(1.0), F(0.99) } }; #undef F /** Helper structure to index the different curve maps. */ @@ -663,6 +663,12 @@ static void HeightMapCurves(uint level) height_t *h = &_height_map.height(x, y); + /* Do not touch sea level */ + if (*h < I2H(1)) continue; + + /* Only scale above sea level */ + *h -= I2H(1); + /* Apply all curve maps that are used on this tile. */ for (uint t = 0; t < lengthof(curve_maps); t++) { if (!HasBit(corner_bits, t)) continue; @@ -684,6 +690,9 @@ static void HeightMapCurves(uint level) /* Apply interpolation of curve map results. */ *h = (height_t)((ht[corner_a] * yri + ht[corner_b] * yr) * xri + (ht[corner_c] * yri + ht[corner_d] * yr) * xr); + + /* Readd sea level */ + *h += I2H(1); } } } |