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Replaced initial branch statement with code similar to existing branchless code

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Collin Smith 2019-05-02 05:06:05 -07:00
parent 2a0ed7d40a
commit 4c2b8f8d1c
1 changed files with 19 additions and 18 deletions
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37
core/src/com/riiablo/entity/DirectionUtils.java
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@ -149,9 +149,9 @@ public class DirectionUtils {
}
static int radiansToDirection4(float radians) {
if (radians >= RADIANS_4M[3]) return DIRS_4M[0];
int index = (radians < RADIANS_4M[1]) ? 0 : 2;
index |= (radians < RADIANS_4M[index]) ? 0 : 1;
int index = (radians < RADIANS_4M[1]) ? 0 : 2;
index |= (radians < RADIANS_4M[index]) ? 0 : 1;
index &= (radians >= RADIANS_4M[3 ]) ? 0 : index;
return DIRS_4M[index];
}
@ -167,10 +167,10 @@ public class DirectionUtils {
}
static int radiansToDirection8(float radians) {
if (radians >= RADIANS_8M[7]) return DIRS_8M[0];
int index = (radians < RADIANS_8M[3]) ? 0 : 4;
index |= (radians < RADIANS_8M[index|1]) ? 0 : 2;
index |= (radians < RADIANS_8M[index ]) ? 0 : 1;
int index = (radians < RADIANS_8M[3]) ? 0 : 4;
index |= (radians < RADIANS_8M[index|1]) ? 0 : 2;
index |= (radians < RADIANS_8M[index ]) ? 0 : 1;
index &= (radians >= RADIANS_8M[7 ]) ? 0 : index;
return DIRS_8M[index];
}
@Deprecated
@ -185,11 +185,11 @@ public class DirectionUtils {
}
static int radiansToDirection16(float radians) {
if (radians >= RADIANS_16M[15]) return DIRS_16M[0];
int index = (radians < RADIANS_16M[7]) ? 0 : 8;
index |= (radians < RADIANS_16M[index|3]) ? 0 : 4;
index |= (radians < RADIANS_16M[index|1]) ? 0 : 2;
index |= (radians < RADIANS_16M[index ]) ? 0 : 1;
int index = (radians < RADIANS_16M[7]) ? 0 : 8;
index |= (radians < RADIANS_16M[index|3]) ? 0 : 4;
index |= (radians < RADIANS_16M[index|1]) ? 0 : 2;
index |= (radians < RADIANS_16M[index ]) ? 0 : 1;
index &= (radians >= RADIANS_16M[15 ]) ? 0 : index;
return DIRS_16M[index];
}
@ -205,12 +205,13 @@ public class DirectionUtils {
}
static int radiansToDirection32(float radians) {
if (radians >= RADIANS_32M[31]) return DIRS_32M[0];
int index = (radians < RADIANS_32M[15]) ? 0 : 16;
index |= (radians < RADIANS_32M[index|7]) ? 0 : 8;
index |= (radians < RADIANS_32M[index|3]) ? 0 : 4;
index |= (radians < RADIANS_32M[index|1]) ? 0 : 2;
index |= (radians < RADIANS_32M[index ]) ? 0 : 1;
int index = (radians < RADIANS_32M[15]) ? 0 : 16;
index |= (radians < RADIANS_32M[index|7]) ? 0 : 8;
index |= (radians < RADIANS_32M[index|3]) ? 0 : 4;
index |= (radians < RADIANS_32M[index|1]) ? 0 : 2;
index |= (radians < RADIANS_32M[index ]) ? 0 : 1;
index &= (radians >= RADIANS_32M[31 ]) ? 0 : index;
// above line should remove need for initial conditional statement
return DIRS_32M[index];
}
}