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Refactor storing of ray-casted distances.

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The ray-casting is done when camera_update() is called, and distances
are stored in the Camera struct.
This commit is contained in:
Sheldon Lee
2023-04-20 00:28:17 +01:00
parent 33f673741b
commit 2c06859473
7 changed files with 145 additions and 100 deletions
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camera.cpp
+41 -2
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@@ -7,12 +7,24 @@
#define TRANSLATIONAL_SPEED 1.f
static void move(Camera* camera, float t);
static void castRays(Camera* camera);
int camera_init(Camera* camera, sf::Vector2f pos, float direction, unsigned int resolution, float fov)
{
camera->pos = pos;
camera->direction = direction;
camera->resolution = resolution;
camera->fov = fov;
camera->rays = (CameraRay*)malloc(sizeof(CameraRay)*resolution);
return 1;
}
void camera_update(Camera* camera, float t)
{
if (!camera) return;
move(camera, t);
castRays(camera);
}
static void move(Camera* camera, float t)
@@ -29,8 +41,35 @@ static void move(Camera* camera, float t)
rotation -=1;
float magnitude = forward * t * TRANSLATIONAL_SPEED;
sf::Vector2f offset(magnitude * cos(camera->direction), magnitude *sin(camera->direction));
sf::Vector2f offset(magnitude * cos(camera->direction), magnitude * sin(camera->direction));
camera->pos += offset;
camera->direction += rotation * t * ROTATION_SPEED;
}
void camera_destroy(Camera *camera)
{
free(camera->rays);
}
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;
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;
}
}