OpenTTD Source  20241108-master-g80f628063a
landscape_partial_pixel_z.cpp
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1 /*
2  * This file is part of OpenTTD.
3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
6  */
7 
10 #include "../stdafx.h"
11 
12 #include "../3rdparty/catch2/catch.hpp"
13 
14 #include "../landscape.h"
15 #include "../slope_func.h"
16 
26 bool CheckPartialPixelZSlopeAddition(Slope slope_expected, Slope slope_a, Slope slope_b)
27 {
28  for (uint x = 0; x < TILE_SIZE; x++) {
29  for (uint y = 0; y < TILE_SIZE; y++) {
30  int z_a = GetPartialPixelZ(x, y, slope_a);
31  int z_b = GetPartialPixelZ(x, y, slope_b);
32  int z_result = GetPartialPixelZ(x, y, slope_expected);
33  if (z_result != z_a + z_b) return false;
34  }
35  }
36  return true;
37 }
38 
39 TEST_CASE("PartialPixelSlopeAdditionTest - A one corner slope, plus the opposite three corner slope results in a flat but elevated slope")
40 {
41  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_N, SLOPE_WSE));
42  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_E, SLOPE_NWS));
43  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_S, SLOPE_ENW));
44  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_W, SLOPE_SEN));
45 }
46 
47 TEST_CASE("PartialPixelSlopeAdditionTest - Diagonal slopes with their opposite slope result in a flat but elevated slope")
48 {
49  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_NW, SLOPE_SE));
50  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_SW, SLOPE_NE));
51 }
52 
53 TEST_CASE("PartialPixelSlopeAdditionTest - Half tile slopes with their opposite half tile slope result in a flat but elevated slope")
54 {
55  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, HalftileSlope(SLOPE_N, CORNER_N), HalftileSlope(SLOPE_S, CORNER_S)));
56  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, HalftileSlope(SLOPE_E, CORNER_E), HalftileSlope(SLOPE_W, CORNER_W)));
57 }
58 
59 TEST_CASE("PartialPixelSlopeAdditionTest - Two opposite one corner slopes result in the two corner slope with opposite corners")
60 {
61  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_NS, SLOPE_N, SLOPE_S));
62  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_EW, SLOPE_E, SLOPE_W));
63 }
64 
65 TEST_CASE("PartialPixelSlopeAdditionTest - A steep slope is a one corner slope on top of a three corner slope")
66 {
67  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_N, SLOPE_N, SLOPE_ENW));
68  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_E, SLOPE_E, SLOPE_SEN));
69  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_S, SLOPE_S, SLOPE_WSE));
70  CHECK(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_W, SLOPE_W, SLOPE_NWS));
71 }
72 
73 TEST_CASE("PartialPixelSlopeAdditionTest - A half tile steep slope is a one corner half tile on top of a three corner slope")
74 {
75  CHECK(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_N, CORNER_N), HalftileSlope(SLOPE_N, CORNER_N), SLOPE_ENW));
76  CHECK(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_E, CORNER_E), HalftileSlope(SLOPE_E, CORNER_E), SLOPE_SEN));
77  CHECK(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_S, CORNER_S), HalftileSlope(SLOPE_S, CORNER_S), SLOPE_WSE));
78  CHECK(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_W, CORNER_W), HalftileSlope(SLOPE_W, CORNER_W), SLOPE_NWS));
79 }
80 
88 bool CheckPartialPixelZ(Slope slope, std::array<int, TILE_SIZE * TILE_SIZE> expected)
89 {
90  for (uint i = 0; i < expected.size(); i++) {
91  int actual = GetPartialPixelZ(GB(i, 4, 4), GB(i, 0, 4), slope);
92  if (actual != expected[i]) return false;
93  }
94  return true;
95 }
96 
97 TEST_CASE("PartialPixelTest - One corner up slopes - SLOPE_N")
98 {
99  CHECK(CheckPartialPixelZ(SLOPE_N, {
100  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
101  7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0,
102  7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0,
103  6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0,
104  6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0,
105  5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0,
106  5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0,
107  4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
108  4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
109  3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
110  3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
111  2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
112  2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
113  1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
114  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
115  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
116 }
117 
118 TEST_CASE("PartialPixelTest - One corner up slopes - SLOPE_E")
119 {
120  CHECK(CheckPartialPixelZ(SLOPE_E, {
121  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
122  0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7,
123  0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
124  0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
125  0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
126  0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
127  0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
128  0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
129  0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4,
130  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
131  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3,
132  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2,
133  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2,
134  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
135  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
136  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
137 }
138 
139 TEST_CASE("PartialPixelTest - One corner up slopes - SLOPE_S")
140 {
141  CHECK(CheckPartialPixelZ(SLOPE_S, {
142  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
143  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
144  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
145  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
146  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2,
147  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2,
148  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3,
149  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
150  0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4,
151  0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
152  0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
153  0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
154  0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
155  0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
156  0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
157  0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7}));
158 }
159 
160 TEST_CASE("PartialPixelTest - One corner up slopes - SLOPE_W")
161 {
162  CHECK(CheckPartialPixelZ(SLOPE_W, {
163  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
164  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
165  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
166  1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
167  2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
168  2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
169  3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
170  3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
171  4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
172  4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
173  5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0,
174  5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0,
175  6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0,
176  6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0,
177  7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0,
178  7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0}));
179 }
180 
181 TEST_CASE("PartialPixelTest - Two corner up, diagonal slopes - SLOPE_NE")
182 {
183  CHECK(CheckPartialPixelZ(SLOPE_NE, {
184  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
185  7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
186  7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
187  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
188  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
189  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
190  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
191  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
192  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
193  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
194  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
195  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
196  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
197  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
198  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
199  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
200 }
201 
202 TEST_CASE("PartialPixelTest - Two corner up, diagonal slopes - SLOPE_SE")
203 {
204  CHECK(CheckPartialPixelZ(SLOPE_SE, {
205  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
206  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
207  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
208  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
209  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
210  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
211  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
212  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
213  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
214  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
215  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
216  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
217  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
218  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
219  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
220  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8}));
221 }
222 
223 TEST_CASE("PartialPixelTest - Two corner up, diagonal slopes - SLOPE_SW")
224 {
225  CHECK(CheckPartialPixelZ(SLOPE_SW, {
226  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
227  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
228  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
229  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
230  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
231  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
232  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
233  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
234  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
235  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
236  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
237  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
238  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
239  7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
240  7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
241  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
242 }
243 
244 TEST_CASE("PartialPixelTest - Two corner up, diagonal slopes - SLOPE_NW")
245 {
246  CHECK(CheckPartialPixelZ(SLOPE_NW, {
247  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
248  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
249  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
250  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
251  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
252  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
253  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
254  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
255  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
256  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
257  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
258  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
259  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
260  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
261  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
262  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0}));
263 }
264 
265 TEST_CASE("PartialPixelTest - Two opposite corner up slopes - SLOPE_NS")
266 {
267  CHECK(CheckPartialPixelZ(SLOPE_NS, {
268  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
269  7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0,
270  7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1,
271  6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1,
272  6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2,
273  5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2,
274  5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3,
275  4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3,
276  4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4,
277  3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
278  3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
279  2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
280  2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
281  1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
282  1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
283  0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7}));
284 }
285 
286 TEST_CASE("PartialPixelTest - Two opposite corner up slopes - SLOPE_EW")
287 {
288  CHECK(CheckPartialPixelZ(SLOPE_EW, {
289  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
290  0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7,
291  1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
292  1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
293  2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
294  2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
295  3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
296  3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
297  4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4,
298  4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3,
299  5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3,
300  5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2,
301  6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2,
302  6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1,
303  7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1,
304  7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0}));
305 }
306 
307 TEST_CASE("PartialPixelTest - Three corner up slopes - SLOPE_ENW")
308 {
309  CHECK(CheckPartialPixelZ(SLOPE_ENW, {
310  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
311  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
312  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
313  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7,
314  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6,
315  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6,
316  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5,
317  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5,
318  8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4,
319  8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
320  8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
321  8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
322  8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
323  8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
324  8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
325  8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1}));
326 }
327 
328 TEST_CASE("PartialPixelTest - Three corner up slopes - SLOPE_SEN")
329 {
330  CHECK(CheckPartialPixelZ(SLOPE_SEN, {
331  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
332  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
333  7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
334  7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
335  6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
336  6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
337  5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
338  5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
339  4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8,
340  4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8,
341  3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8,
342  3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8,
343  2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8,
344  2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8,
345  1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8,
346  1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8}));
347 }
348 
349 TEST_CASE("PartialPixelTest - Three corner up slopes - SLOPE_WSE")
350 {
351  CHECK(CheckPartialPixelZ(SLOPE_WSE, {
352  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
353  1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
354  1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8,
355  2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8,
356  2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8,
357  3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8,
358  3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8,
359  4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8,
360  4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8,
361  5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
362  5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
363  6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
364  6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
365  7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
366  7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
367  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
368 }
369 
370 TEST_CASE("PartialPixelTest - Three corner up slopes - SLOPE_NWS")
371 {
372  CHECK(CheckPartialPixelZ(SLOPE_NWS, {
373  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
374  8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1,
375  8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
376  8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
377  8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
378  8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
379  8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
380  8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
381  8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4,
382  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5,
383  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5,
384  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6,
385  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6,
386  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7,
387  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
388  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
389 }
390 
391 TEST_CASE("PartialPixelTest - Normal half tile slopes - SLOPE/CORNER_N")
392 {
393  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_N, CORNER_N), {
394  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
395  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0,
396  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0,
397  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0,
398  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0,
399  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0,
400  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0,
401  8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0,
402  8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0,
403  8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
404  8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
405  8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
406  8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
407  8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
408  8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
409  8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
410 }
411 
412 TEST_CASE("PartialPixelTest - Normal half tile slopes - SLOPE/CORNER_E")
413 {
414  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_E, CORNER_E), {
415  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
416  0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
417  0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
418  0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
419  0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
420  0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
421  0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
422  0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8,
423  0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8,
424  0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8,
425  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8,
426  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8,
427  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8,
428  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8,
429  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8,
430  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8}));
431 }
432 
433 TEST_CASE("PartialPixelTest - Normal half tile slopes - SLOPE/CORNER_S")
434 {
435  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_S, CORNER_S), {
436  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
437  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8,
438  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8,
439  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8,
440  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8,
441  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8,
442  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8,
443  0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8,
444  0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8,
445  0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8,
446  0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
447  0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
448  0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
449  0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
450  0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
451  0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
452 }
453 
454 TEST_CASE("PartialPixelTest - Normal half tile slopes - SLOPE/CORNER_W")
455 {
456  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_W, CORNER_W), {
457  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
458  8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
459  8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
460  8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
461  8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
462  8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
463  8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
464  8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
465  8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0,
466  8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0,
467  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0,
468  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0,
469  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0,
470  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0,
471  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0,
472  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0}));
473 }
474 
475 TEST_CASE("PartialPixelTest - Steep slopes - SLOPE_STEEP_N")
476 {
477  CHECK(CheckPartialPixelZ(SLOPE_STEEP_N, {
478  16, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8,
479  15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8,
480  15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7,
481  14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7,
482  14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6,
483  13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6,
484  13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5,
485  12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5,
486  12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4,
487  11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
488  11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
489  10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
490  10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
491  9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
492  9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
493  8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1}));
494 }
495 
496 TEST_CASE("PartialPixelTest - Steep slopes - SLOPE_STEEP_E")
497 {
498  CHECK(CheckPartialPixelZ(SLOPE_STEEP_E, {
499  8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16,
500  8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15,
501  7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15,
502  7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14,
503  6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14,
504  6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
505  5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13,
506  5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12,
507  4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12,
508  4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
509  3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11,
510  3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10,
511  2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10,
512  2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9,
513  1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9,
514  1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8}));
515 }
516 
517 TEST_CASE("PartialPixelTest - Steep slopes - SLOPE_STEEP_S")
518 {
519  CHECK(CheckPartialPixelZ(SLOPE_STEEP_S, {
520  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
521  1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
522  1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9,
523  2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9,
524  2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10,
525  3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10,
526  3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11,
527  4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
528  4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12,
529  5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12,
530  5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13,
531  6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
532  6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14,
533  7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14,
534  7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15,
535  8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15}));
536 }
537 
538 TEST_CASE("PartialPixelTest - Steep slopes - SLOPE_STEEP_W")
539 {
540  CHECK(CheckPartialPixelZ(SLOPE_STEEP_W, {
541  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
542  8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1,
543  9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
544  9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
545  10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
546  10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
547  11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
548  11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
549  12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4,
550  12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5,
551  13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5,
552  13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6,
553  14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6,
554  14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7,
555  15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7,
556  15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8}));
557 }
558 
559 TEST_CASE("PartialPixelTest - Half tile on top of steep slopes - SLOPE_STEEP/CORNER_N")
560 {
561  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_N, CORNER_N), {
562  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
563  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8,
564  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7,
565  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7,
566  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6,
567  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6,
568  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5,
569  16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5,
570  16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4,
571  16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4,
572  16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
573  16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
574  16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
575  16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
576  16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
577  16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1}));
578 }
579 
580 TEST_CASE("PartialPixelTest - Half tile on top of steep slopes - SLOPE_STEEP/CORNER_E")
581 {
582  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_E, CORNER_E), {
583  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
584  8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
585  7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
586  7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
587  6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
588  6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
589  5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
590  5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16,
591  4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16,
592  4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16,
593  3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16,
594  3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16,
595  2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16,
596  2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16,
597  1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16,
598  1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16}));
599 }
600 
601 TEST_CASE("PartialPixelTest - Half tile on top of steep slopes - SLOPE_STEEP/CORNER_S")
602 {
603  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_S, CORNER_S), {
604  0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
605  1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16,
606  1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16,
607  2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16,
608  2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16,
609  3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16,
610  3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16,
611  4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16,
612  4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16,
613  5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16,
614  5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
615  6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
616  6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
617  7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
618  7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
619  8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16}));
620 }
621 
622 TEST_CASE("PartialPixelTest - Half tile on top of steep slopes - SLOPE_STEEP/CORNER_W")
623 {
624  CHECK(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_W, CORNER_W), {
625  8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
626  16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1,
627  16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
628  16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
629  16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
630  16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
631  16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
632  16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4,
633  16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4,
634  16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5,
635  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5,
636  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6,
637  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6,
638  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7,
639  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7,
640  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8}));
641 }
GB
constexpr static debug_inline uint GB(const T x, const uint8_t s, const uint8_t n)
Fetch n bits from x, started at bit s.
Definition: bitmath_func.hpp:32
GetPartialPixelZ
uint GetPartialPixelZ(int x, int y, Slope corners)
Determines height at given coordinate of a slope.
Definition: landscape.cpp:228
CheckPartialPixelZ
bool CheckPartialPixelZ(Slope slope, std::array< int, TILE_SIZE *TILE_SIZE > expected)
Check whether the partial pixel Z values are the expected values.
Definition: landscape_partial_pixel_z.cpp:88
CheckPartialPixelZSlopeAddition
bool CheckPartialPixelZSlopeAddition(Slope slope_expected, Slope slope_a, Slope slope_b)
Check whether the addition of two slope's GetPartialPixelZ values results in the GetPartialPixelZ val...
Definition: landscape_partial_pixel_z.cpp:26
HalftileSlope
static constexpr Slope HalftileSlope(Slope s, Corner corner)
Adds a halftile slope to a slope.
Definition: slope_func.h:274
Slope
Slope
Enumeration for the slope-type.
Definition: slope_type.h:48
SLOPE_W
@ SLOPE_W
the west corner of the tile is raised
Definition: slope_type.h:50
SLOPE_ELEVATED
@ SLOPE_ELEVATED
bit mask containing all 'simple' slopes
Definition: slope_type.h:61
SLOPE_NS
@ SLOPE_NS
north and south corner are raised
Definition: slope_type.h:60
SLOPE_E
@ SLOPE_E
the east corner of the tile is raised
Definition: slope_type.h:52
SLOPE_WSE
@ SLOPE_WSE
west, south and east corner are raised
Definition: slope_type.h:63
SLOPE_S
@ SLOPE_S
the south corner of the tile is raised
Definition: slope_type.h:51
SLOPE_N
@ SLOPE_N
the north corner of the tile is raised
Definition: slope_type.h:53
SLOPE_SEN
@ SLOPE_SEN
south, east and north corner are raised
Definition: slope_type.h:64
SLOPE_ENW
@ SLOPE_ENW
east, north and west corner are raised
Definition: slope_type.h:65
SLOPE_SW
@ SLOPE_SW
south and west corner are raised
Definition: slope_type.h:56
SLOPE_STEEP_W
@ SLOPE_STEEP_W
a steep slope falling to east (from west)
Definition: slope_type.h:66
SLOPE_NE
@ SLOPE_NE
north and east corner are raised
Definition: slope_type.h:58
SLOPE_STEEP_E
@ SLOPE_STEEP_E
a steep slope falling to west (from east)
Definition: slope_type.h:68
SLOPE_SE
@ SLOPE_SE
south and east corner are raised
Definition: slope_type.h:57
SLOPE_NWS
@ SLOPE_NWS
north, west and south corner are raised
Definition: slope_type.h:62
SLOPE_NW
@ SLOPE_NW
north and west corner are raised
Definition: slope_type.h:55
SLOPE_STEEP_N
@ SLOPE_STEEP_N
a steep slope falling to south (from north)
Definition: slope_type.h:69
SLOPE_STEEP_S
@ SLOPE_STEEP_S
a steep slope falling to north (from south)
Definition: slope_type.h:67
SLOPE_EW
@ SLOPE_EW
east and west corner are raised
Definition: slope_type.h:59
TILE_SIZE
static const uint TILE_SIZE
Tile size in world coordinates.
Definition: tile_type.h:15