williamjcm/raycastlib
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Fix a bug

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This commit is contained in:
Miloslav Číž 2018-08-23 03:04:52 +02:00
parent ddbbfef456
commit 126f38e5c0
2 changed files with 48 additions and 30 deletions
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35
raycastlib.h
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@ -19,6 +19,25 @@
typedef int32_t Unit; /**< Smallest spatial unit, there is UNITS_PER_SQUARE
units in a square's length. */
#define logVector2D(v)\
printf("[%d,%d]\n",v.x,v.y);
#define logRay(r)\
printf("ray:\n");\
printf(" start: ");\
logVector2D(r.start);\
printf(" dir: ");\
logVector2D(r.direction);\
#define logHitResult(h)\
printf("hit:\n");\
printf(" sqaure: ");\
logVector2D(h.square);\
printf(" pos: ");\
logVector2D(h.position);\
printf(" dist: %d", h.distance);\
printf(" texcoord: %d", h.textureCoord);\
/// Position in 2D space.
typedef struct
{
@ -68,6 +87,17 @@ void castRayMultiHit(Ray ray, int16_t (*arrayFunc)(int16_t, int16_t),
//=============================================================================
// privates
Unit clamp(Unit value, Unit valueMin, Unit valueMax)
{
if (value < valueMin)
return valueMin;
if (value > valueMax)
return valueMax;
return value;
}
uint16_t sqrtInt(uint32_t value)
{
uint32_t result = 0;
@ -123,9 +153,10 @@ void castRaySquare(Ray localRay, Vector2D *nextCellOffset,
{\
nextCellOffset->c1 = n;\
collisionPointOffset->c1 = criticalLine.start.c1 - localRay.start.c1;\
collisionPointOffset->c2 =\
collisionPointOffset->c2 = clamp(\
(collisionPointOffset->c1 * localRay.direction.c2) /\
(localRay.direction.c1 == 0 ? 1 : localRay.direction.c1);\
(localRay.direction.c1 == 0 ? 1 : localRay.direction.c1),\
0,UNITS_PER_SQUARE - 1);\
}
#define helper2(n1,n2,c)\

43
test.c
View file

@ -1,33 +1,11 @@
#include "raycastlib.h"
#include <stdio.h>
void logVector2D(Vector2D v)
{
printf("[%d,%d]\n",v.x,v.y);
}
void logRay(Ray r)
{
printf("ray:\n");
printf(" start: ");
logVector2D(r.start);
printf(" dir: ");
logVector2D(r.direction);
}
void logHitResult(HitResult h)
{
printf("hit:\n");\
printf(" sqaure: ");
logVector2D(h.square);
printf(" pos: ");
logVector2D(h.position);
printf(" dist: %d", h.distance);
printf(" texcoord: %d", h.textureCoord);
}
#include "raycastlib.h"
int16_t testArrayFunc(int16_t x, int16_t y)
{
if (x > 12 || y > 12)
return x * y;
return (x < 0 || y < 0 || x > 9 || y > 9) ? 1 : 0;
}
@ -63,9 +41,9 @@ int testSingleRay(Unit startX, Unit startY, Unit dirX, Unit dirY,
h.position.y >= expectPointY - tolerateError;
if (result)
printf("\nOK\n");
printf("\nOK\n\n");
else
printf("\nFAIL\n");
printf("\nFAIL\n\n");
return result;
}
@ -83,5 +61,14 @@ int main()
16))
return 1;
if (!testSingleRay(
0,
0,
100, 100,
10, 9,
10240, 10239,
16))
return 1;
return 0;
}