y-shearing!

1 files changed, 19 insertions, 11 deletions

diff --git a/src/main.c b/src/main.c
index 34a4d0e..3069e66 100644
--- a/src/main.c
+++ b/src/main.c
@@ -108,10 +108,15 @@ void raycast(Player *player, int width, int height) {
 		
 		// calculate height of line on screen
 		int line_height = (int)(screen_height / perp_wall_dist);
-		int draw_start = -line_height / 2 + screen_height / 2;
-		if (draw_start < 0) { draw_start = 0; }
-		int draw_end = line_height / 2 + screen_height / 2;
-		if (draw_end >= screen_height)  { draw_end = screen_height - 1; }
+		//int draw_start = -line_height / 2 + screen_height / 2;
+		//if (draw_start < 0) { draw_start = 0; }
+		//int draw_end = line_height / 2 + screen_height / 2;
+		//if (draw_end >= screen_height)  { draw_end = screen_height - 1; }
+		int pitch = screen_height / 2 * player->look_angle;
+		int start_y = -line_height / 2 + screen_height / 2 + pitch;
+		if (start_y < 0) { start_y = 0; }
+		int end_y = line_height / 2 + screen_height / 2 + pitch;
+		if (end_y >= screen_height) { end_y = screen_height - 1; }
 
 
 		// colors :)
@@ -144,11 +149,15 @@ void raycast(Player *player, int width, int height) {
 
 		// TODO: recommended to put this in its own function or something at some point,
 		// as it deals with library calls outside of this function's scope
-		glBegin(GL_LINES);
-		glColor3ub(color.r, color.g, color.b);
-		glVertex2i(x, draw_start);
-		glVertex2i(x, draw_end);
-		glEnd();
+		
+		for (int y = start_y; y < end_y; y++) {
+			glBegin(GL_LINES);
+			glColor3ub(color.r, color.g, color.b);
+			glVertex2i(x, start_y);
+			glVertex2i(x, end_y);
+			glEnd();
+		}
+
     	}
 }
 
@@ -165,6 +174,7 @@ int main(int argc, char *argv[]) {
 	player.dir_y = 0.0f; // facing right
 	player.plane_x = 0.0f; // FOV related
 	player.plane_y = 0.66f; // FOV related
+	player.look_angle = 0.0f;
 	player.move_speed = 0.02f;
 	player.sensitivity = 0.001f;
 
@@ -221,8 +231,6 @@ int main(int argc, char *argv[]) {
 			glfwSetWindowTitle(window, title);
 			nb_frames = 0;
 			last_time += 1.0;
-		} else if (current_time - last_time >= 0.7) {
-			//glfwSetCursorPos(window, mode->width / 2, mode->height / 2);
 		}
 
 		// clear window