sheldonmlee/raycasting
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Make ray generation sane

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This commit is contained in:
Sheldon Lee 2023-04-20 02:19:54 +01:00
parent 787b25239e
commit 900504971b
1 changed files with 3 additions and 12 deletions
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15
camera.cpp
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@ -1,4 +1,5 @@
#include "camera.h"
#include <stdio.h>
#include "maths.h"
#include "level.h"
@ -54,22 +55,12 @@ void camera_destroy(Camera *camera)
static void castRays(Camera* camera)
{
float rayDirection = 0;
float rayDirectionStep = camera->fov / (float)camera->resolution;
bool isOddResolution = (camera->resolution % 2);
float rayDirectionOffset = isOddResolution? 0 : rayDirectionStep / 2.f;
float rayDirection = camera->direction - camera->fov/2.f + rayDirectionStep/2.f;
for (unsigned int i = 0; i < camera->resolution; i++) {
if (isOddResolution && i == 0)
rayDirection = camera->direction;
else if (i % 2)
rayDirection = camera->direction - rayDirectionOffset;
else
rayDirection = camera->direction + rayDirectionOffset;
camera->rays[i].direction = rayDirection;
camera->rays[i].distance = level_rayCastDistance(camera->pos, rayDirection);
if ((i + isOddResolution) % 2) rayDirectionOffset += rayDirectionStep;
rayDirection += rayDirectionStep;
}
}