Formatting changes; added vectors.

src/ragar/ragar_main.c

@@ -11,8 +11,9 @@
 #include "renderer/display.c"
 #include "renderer/vector.c"
 
-Vec3 cube_points[9 * 9 * 9] = {0}; // 9 x 9 x 9 cube
+#define POINTS (9 * 9 * 9)
-Vec2 projected_points[9 * 9 * 9];
+Vec3F32 cube_points[POINTS];
+Vec2F32 projected_points[POINTS];
 
 int is_running;
 
@@ -21,12 +22,14 @@ void setup(void) {
   colour_buffer_texture =
       SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, window_width, window_height);
 
-  // Load vector array
   int point_count = 0;
-  for (f32 x = -1; x <= 1; x += 0.25) {
+
-    for (f32 y = -1; y <= 1; y += 0.25) {
+  // Start loading an array of vectors
-      for (f32 z = -1; z <= 1; z += 0.25) {
+  // from -1 to 1 (in the 9*9*9 cube)
-        Vec3 new_point = {.x = x, .y = y, .z = z};
+  for (f32 x = -1; x < 1; x += 0.25) {
+    for (f32 y = -1; y < 1; y += 0.25) {
+      for (f32 z = -1; z < 1; z += 0.25) {
+        Vec3F32 new_point = {.x = x, .y = y, .z = z};
         cube_points[point_count++] = new_point;
       }
     }
@@ -34,10 +37,10 @@ void setup(void) {
 }
 
 // Orthographic projection
-Vec2 project(Vec3 point) {
+// Vec2F32 project(Vec3F32 point) {
-  Vec2 projected_point = {.x = point.x, .y = point.y};
+//   Vec2F32 projected_point = {.x = point.x, .y = point.y};
-  return projected_point;
+//   return projected_point;
-}
+// }
 
 void process_input(void) {
   SDL_Event event;
@@ -57,10 +60,20 @@ void process_input(void) {
   }
 }
 
+// Convert 3D projection -> 2D
+Vec2F32 project(Vec3F32 point) {
+  Vec2F32 projected_point = {.x = point.x, .y = point.y};
+  return projected_point;
+}
+
 void update(void) {
-  for (int i = 0; i < (9*9*9); i++) {
+  for (int i = 0; i < POINTS; ++i) {
-    Vec3 point = cube_points[i];
+    Vec3F32 point = cube_points[i];
-    Vec2 projected_point = project(point);
+
+    // Project the current point
+    Vec2F32 projected_point = project(point);
+
+    // save the projected 2D vector in the array of projected_points
     projected_points[i] = projected_point;
   }
 }
@@ -68,9 +81,15 @@ void update(void) {
 void render(void) {
   // FrameMarkStart("render");
   draw_grid(0xFFFFFFFF);
-  
+
-  SDL_SetRenderDrawColor(renderer, 28, 450, 560, 255);
+  // Loop all projected points and render them
-  SDL_RenderClear(renderer);
+  for (int i = 0; i < POINTS; i++) {
+    Vec2F32 projected_point = projected_points[i];
+    draw_rect(projected_point.x, projected_point.y, 4, 4, 0xFFFFFF00);
+  }
+
+  // SDL_SetRenderDrawColor(renderer, 28, 450, 560, 255);
+  // SDL_RenderClear(renderer);
 
   render_colour_buffer();
   // clear_colour_buffer(0xFF384893);

src/renderer/display.c

@@ -71,7 +71,10 @@ void draw_rect(s32 x, s32 y, s32 width, s32 height, s32 colour) {
     for (int column = 0; column < height; column++) {
       s32 l_row = row + x;
       s32 l_column = column + y;
-      colour_buffer[(window_width * l_column) + l_row] = colour;
+
+      draw_pixel(l_row, l_column, colour);
+
+      // colour_buffer[(window_width * l_column) + l_row] = colour;
     }
   }
 }

src/renderer/vector.h

@@ -0,0 +1,17 @@
+#ifndef VECTOR_H
+#define VECTOR_H
+
+typedef struct Vec2F32 Vec2F32;
+struct Vec2F32 {
+  f32 x;
+  f32 y;
+};
+
+typedef struct Vec3F32 Vec3F32;
+struct Vec3F32 {
+  f32 x;
+  f32 y;
+  f32 z;
+};
+
+#endif // VECTOR_H