Now the sprites are rendered in the 3d scene with just SFML sprites.

raycaster.cpp

@@ -41,6 +41,7 @@ Raycaster::Raycaster(sf::RenderWindow& window, Matrix &map, int width, int heigh
   $view_sprite.setPosition({0, 0});
   $pixels = make_unique<RGBA[]>($width * $height);
   $textures.load_textures();
+  $view_texture.setSmooth(false);
 }
 
 void Raycaster::set_position(int x, int y) {
@@ -111,11 +112,21 @@ void Raycaster::sprite_casting() {
     // calculate width the the sprite
     // same as height of sprite, given that it's square
     int spriteWidth = abs(int($height / transformY)) / sprite_rec.uDiv;
+
     int drawStartX = -spriteWidth / 2 + spriteScreenX;
     if(drawStartX < 0) drawStartX = 0;
     int drawEndX = spriteWidth / 2 + spriteScreenX;
     if(drawEndX > $width) drawEndX = $width;
 
+    int stripe = drawStartX;
+    for(; stripe < drawEndX; stripe++) {
+      //the conditions in the if are:
+      //1) it's in front of camera plane so you don't see things behind you
+      //2) ZBuffer, with perpendicular distance
+      if(!(transformY > 0 && transformY < ZBuffer[stripe])) break;
+    }
+
+    int texX_end = int(256 * (stripe - (-spriteWidth / 2 + spriteScreenX)) * textureWidth / spriteWidth) / 256;
 
     if(drawStartX < drawEndX && transformY > 0 && transformY < ZBuffer[drawStartX]) {
       int vMoveScreen = int(sprite_rec.elevation * -1 / transformY);
@@ -125,18 +136,18 @@ void Raycaster::sprite_casting() {
       int drawEndY = spriteHeight / 2 + $height / 2 + vMoveScreen;
       if(drawEndY >= $height) drawEndY = $height - 1;
 
+      int texX = int(256 * (drawStartX - (-spriteWidth / 2 + spriteScreenX)) * textureWidth / spriteWidth) / 256;
+
       float x = float(drawStartX + RAY_VIEW_X);
       float y = float(drawStartY + RAY_VIEW_Y);
       float sprite_w = float(spriteWidth) / float(textureWidth);
       float sprite_h = float(spriteHeight) / float(textureHeight);
-      int texX = int(256 * (drawStartX - (-spriteWidth / 2 + spriteScreenX)) * textureWidth / spriteWidth) / 256;
-      int texX_end = int(256 * (drawEndX - (-spriteWidth / 2 + spriteScreenX)) * textureWidth / spriteWidth) / 256;
 
       int d = (y - vMoveScreen) * 256 - $height * 128 + spriteHeight * 128;
       int texY = ((d * textureHeight) / spriteHeight) / 256;
 
-      sf_sprite->setScale({sprite_h, sprite_w});
-      sf_sprite->setTextureRect(sf::IntRect({texX, texY}, {texX_end, textureHeight}));
+      sf_sprite->setScale({sprite_w, sprite_h});
+      sf_sprite->setTextureRect(sf::IntRect({texX, texY}, {texX_end - texX, textureHeight}));
       sf_sprite->setPosition({x, y});
       $window.draw(*sf_sprite);
     }

scratchpad/raycaster_sprites.cpp

@@ -135,14 +135,14 @@ int main(int /*argc*/, char */*argv*/[])
 
   //load some textures
   unsigned long tw, th, error = 0;
-  error |= loadImage(texture[0], tw, th, "assets/eagle.png");
-  error |= loadImage(texture[1], tw, th, "assets/redbrick.png");
-  error |= loadImage(texture[2], tw, th, "assets/purplestone.png");
-  error |= loadImage(texture[3], tw, th, "assets/greystone.png");
-  error |= loadImage(texture[4], tw, th, "assets/bluestone.png");
-  error |= loadImage(texture[5], tw, th, "assets/mossy.png");
-  error |= loadImage(texture[6], tw, th, "assets/wood.png");
-  error |= loadImage(texture[7], tw, th, "assets/colorstone.png");
+  error |= loadImage(texture[0], tw, th, "pics/eagle.png");
+  error |= loadImage(texture[1], tw, th, "pics/redbrick.png");
+  error |= loadImage(texture[2], tw, th, "pics/purplestone.png");
+  error |= loadImage(texture[3], tw, th, "pics/greystone.png");
+  error |= loadImage(texture[4], tw, th, "pics/bluestone.png");
+  error |= loadImage(texture[5], tw, th, "pics/mossy.png");
+  error |= loadImage(texture[6], tw, th, "pics/wood.png");
+  error |= loadImage(texture[7], tw, th, "pics/colorstone.png");
   if(error) { std::cout << "error loading images" << std::endl; return 1; }
 
   //load some sprite textures
@@ -335,11 +335,7 @@ int main(int /*argc*/, char */*argv*/[])
     for(int i = 0; i < numSprites; i++)
     {
       spriteOrder[i] = i;
-      spriteDistance[i] =
-        ((posX - sprite[i].x) *
-         (posX - sprite[i].x) +
-         (posY - sprite[i].y) *
-         (posY - sprite[i].y)); //sqrt not taken, unneeded
+      spriteDistance[i] = ((posX - sprite[i].x) * (posX - sprite[i].x) + (posY - sprite[i].y) * (posY - sprite[i].y)); //sqrt not taken, unneeded
     }
     sortSprites(spriteOrder, spriteDistance, numSprites);
 

texture.cpp

@@ -29,7 +29,8 @@ void TexturePack::load_textures() {
   floor = load_image(assets["floor"]);
   ceiling = load_image(assets["ceiling"]);
 
-  sf::Texture* sprite_texture = new sf::Texture("assets/undead_peasant-256.png");
+  sf::Texture* sprite_texture = new sf::Texture("assets/evil_eye_test-256.png");
+  sprite_texture->setSmooth(false);
   sf::Sprite* sf_sprite = new sf::Sprite(*sprite_texture);
 
   sprites.push_back({4.0, 3.55, 6, sf_sprite, sprite_texture});