Jump and crouch

Author: wernsey

README.md

@@ -49,4 +49,11 @@ commit bb0c927871fbf0d17798a698c4c453b262d15436
 
 # Step 5: Doors
 
-commit f5980c0319457d9fc188d3ac40d5f0643f586973
+commit f5980c0319457d9fc188d3ac40d5f0643f586973
+
+# Step 6: Look up and down
+
+commit 0ef7d398abb09a70e6952e61d83cc6d2b70f29b7
+
+# Step 7: Jump and crouch
+

raycaster_sprites.cpp

@@ -124,6 +124,8 @@ double spriteDistance[numSprites];
 
 double lookVert = 0;
 
+double eyePos = 0;
+
 // lookVert should have values between -LOOK_UP_MAX and LOOK_UP_MAX
 #define LOOK_UP_MAX 128
 
@@ -338,7 +340,7 @@ int main(int /*argc*/, char */*argv*/[])
 
  // Horizontal distance from the camera to the floor for the current row.
  // 0.5 is the z position exactly in the middle between floor and ceiling.
- float rowDistance = posZ / p;
+ float rowDistance = (posZ + eyePos) / p;
 
  // calculate the real world step vector we have to add for each x (parallel to camera plane)
  // adding step by step avoids multiplications with a weight in the inner loop
@@ -396,7 +398,7 @@ int main(int /*argc*/, char */*argv*/[])
 
  // Horizontal distance from the camera to the floor for the current row.
  // 0.5 is the z position exactly in the middle between floor and ceiling.
- float rowDistance = posZ / p;
+ float rowDistance = (posZ - eyePos) / p;
 
  // calculate the real world step vector we have to add for each x (parallel to camera plane)
  // adding step by step avoids multiplications with a weight in the inner loop
@@ -538,8 +540,8 @@ int main(int /*argc*/, char */*argv*/[])
  int lineHeight = (int)(h / perpWallDist);
 
  //calculate lowest and highest pixel to fill in current stripe
- int drawStart = -lineHeight / 2 + h / 2 + lookVert;
- int drawEnd = lineHeight / 2 + h / 2 + lookVert;
+ int drawStart = -lineHeight / 2 + h / 2 + lookVert + eyePos/perpWallDist;
+ int drawEnd = lineHeight / 2 + h / 2 + lookVert + eyePos/perpWallDist;
 
  //calculate value of wallX
  double wallX; //where exactly the wall was hit
@@ -644,8 +646,8 @@ int main(int /*argc*/, char */*argv*/[])
  //calculate height of the sprite on screen
  int spriteHeight = abs(int(h / (transformY))) / vDiv; //using "transformY" instead of the real distance prevents fisheye
  //calculate lowest and highest pixel to fill in current stripe
- int drawStartY = -spriteHeight / 2 + h / 2 + vMoveScreen + lookVert;
- int drawEndY = spriteHeight / 2 + h / 2 + vMoveScreen + lookVert;
+ int drawStartY = -spriteHeight / 2 + h / 2 + vMoveScreen + lookVert + eyePos/transformY;
+ int drawEndY = spriteHeight / 2 + h / 2 + vMoveScreen + lookVert + eyePos/transformY;
 
  //calculate width of the sprite
  int spriteWidth = abs(int (h / (transformY))) / uDiv; // same as height of sprite, given that it's square
@@ -804,6 +806,30 @@ int main(int /*argc*/, char */*argv*/[])
  lookVert = 0;
  }
  }
+ if(keyDown(SDLK_x)) {
+ if(eyePos == 0)
+ eyePos = 128;
+ } else if(keyDown(SDLK_c)) {
+ if(eyePos <= 0 && eyePos > -128) {
+ eyePos -= frameTime * 400;
+ if(eyePos < -128) {
+ eyePos = -128;
+ }
+ }
+ } else {
+ if(eyePos < 0) {
+ eyePos += frameTime * 400;
+ if(eyePos > 0) {
+ eyePos = 0;
+ }
+ }
+ }
+ if(eyePos > 0) {
+ eyePos -= frameTime * 400;
+ if(eyePos < 0) {
+ eyePos = 0;
+ }
+ }
  if(keyDown(SDLK_ESCAPE))
  {
  break;