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Fix fisheye effect with cosine

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This commit is contained in:
Sheldon Lee 2023-04-30 22:47:45 +01:00
parent 4a9d85ba1c
commit 67c41106ff
1 changed files with 6 additions and 2 deletions
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8
firstperson.cpp
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@ -27,8 +27,12 @@ void firstperson_update(sf::RenderTarget* renderTarget, Camera* camera)
renderTexture.clear();
for (unsigned int i = 0; i < camera->resolution; i++) {
float distance = camera->rays[i].distance;
if (distance > 0.f) columnHeight = 0.5f * (float)height/camera->rays[i].distance;
// Get distance of ray intersection in the direction of the camera,
// instead of the actual ray distance to avoid fish eye effect.
float angleDiff = camera->rays[i].direction - camera->direction;
float distance = camera->rays[i].distance * cos(angleDiff);
if (distance > 0.f) columnHeight = 0.5f * (float)height/distance;
float centeredHeight = (float)height/2.f - columnHeight/2.f;
float distanceScale = distance/10.f;