I am at present engaged on a raycaster in Java, and to date, I’ve the ground appropriately textured. The issue, nonetheless, is that the ground would not scroll. In different phrases, once I transfer the digicam within the projection, the ground stays the identical, but the partitions transfer as anticipated. I am actually unsure what I am doing improper. I took nearly all of the code from this reference. Word that I took some liberties when pasting the code in that I used some pseudocode.
I attempted making use of a participant offset to the tileX and tileY variables, e.g., tileX += participant.x, and all I bought was a flooring that scrolls far too rapidly and incorrectly.
for each ray:
... // different stuff referring to the partitions above right here.
int begin = (int)(wallY + wallHeight + 1);
double directionCos = cos(rad(ray.getAngle()));
double directionSin = sin(rad(ray.getAngle()));
int textureDim = 16;
for (int y = begin; y < screenHeight; y++) {
double distance = screenHeight / (2.f * y - screenHeight);
distance /= cos(rad(participant.getAngle()) - rad(ray.getAngle()));
// The supply I grabbed the code from truly appends the participant's x and y to the tileX and tileY variables, however this fully messes up the textures when I attempt to.
double tileX = distance * directionCos;
double tileY = distance * directionSin;
int textureX = Math.floorMod((int)(tileX * textureDim), textureDim);
int textureY = Math.floorMod((int)(tileY * textureDim), textureDim);
int rgb = floorTexture.getRGB(textureX, textureY);
projectionFloor.setRGB((int)wallX, y, rgb);
}
Beneath is a picture of the ground.
Beneath is an animation visualizing the issue.
Beneath is an animation visualizing what occurs if I attempt to apply a participant place offset (it’s not simple to inform, however the scrolling is way sooner than it ought to be and scrolls within the improper course more often than not):
