v0.2.0

readme.md

@@ -3,6 +3,11 @@
 This is just a simple algorithm for the TI-84+ CE to render simple voxels quickly and dynamically. For now it is just an engine/algorithm, but once it is in a ready stage, it will be used to make a couple games.
 
 ![gif](https://cdn.discordapp.com/attachments/1168344250908418078/1168599163961868358/screen.gif) ![image](https://cdn.discordapp.com/attachments/772599413247442948/1168328775025561660/wireframe1.png)
+
+### Setup
+
+In `main.c`, you will find some `#define`'s at the top. Just configure them to your needs. If you change any of the Z render distances, make sure to regenerate the `powAZx50` array by using the Python script found in /utils.
+
 ### TODO
 
  - [ ] Add common voxel coordinate lookup table to optimize rendering
@@ -12,6 +17,9 @@ This is just a simple algorithm for the TI-84+ CE to render simple voxels quickl
  - [ ] Find a way to render everything unclipped (will need help!!)
  - [ ] Render screen coordinates using 8 bit values instead of 16 - will allow the right side of the screen to be used for stats
 
+<br>
+
+ - [x] *Unplanned*: Implement a lookup table for both powAZx50 variables - which are calculated every voxel
 ### Changelog
 
 ***v0.1.0*** - First demo

src/main.c

@@ -15,24 +15,28 @@
 #define GFX_WIDTH_HALF 160
 
 // all exclusive
-#define RENDER_DIST_X 4  // dont draw below -4x or higher than 4x
-#define RENDER_DIST_Y 3
+#define RENDER_DIST_X 8  // dont draw below -4x or higher than 4x
+#define RENDER_DIST_Y 8
 #define RENDER_DIST_Z_BACK 3 // back from the camera
 #define RENDER_DIST_Z_FRONT 8 // above 0
 
-// simple rectangular prism. cone-shape would be best.
+// simple rectangular prism. cone-shape would be best in the future
 #define RENDER_DISTANCE_ALGORITHM (z > -RENDER_DIST_Z_BACK) && (z < RENDER_DIST_Z_FRONT) && (x < RENDER_DIST_X) && (x > -RENDER_DIST_X) && (y < RENDER_DIST_Y) && (y > -RENDER_DIST_Y)
 
 
+// when you change the Z render distance, update these values using the Python script
+uint8_t powAZx50list[] = {98, 78, 62, 50, 40, 32, 26, 20, 16, 13, 10};
 
-void drawBox(int x, int y, int z) {
+
+
+void drawBox(int_fast8_t x, int_fast8_t y, int_fast8_t z) {
 
     // render distance calculations. needs improvement
     if (RENDER_DISTANCE_ALGORITHM) {
 
         // just some optimizations
-        const uint_fast8_t powAZx50 = pow(FOV,z) * 50;
-        const uint_fast8_t powAZp1x50 = pow(FOV,(z+1)) * 50;
+        const uint_fast8_t powAZx50 = powAZx50list[z+3];
+        const uint_fast8_t powAZp1x50 = powAZx50list[z+2];
 
         // calculate values - data type needs to go from -1 to 241 height, 321 width
         // potential optimization here. willing to make viewport 255x255

utils/powAZx50.py

@@ -0,0 +1,11 @@
+import math
+
+a = int(input("Enter the value of RENDER_DISTANCE_Z_BACK: "))
+b = int(input("Enter the value of RENDER_DISTANCE_Z_FRONT: "))
+
+list1 = []
+
+for i in range(a, b):
+    list1.append(round(pow(.8, i)*50))
+
+print(f"{{{str(list1)[1:-1]}}}")