start on rabbit positioning

arena.c

@@ -0,0 +1,87 @@
+#include "bmpload.h"
+#include "const.h"
+#include "arena.h"
+
+char arenaLayout[10][10] = {
+  { 1, 1, 1, 1, 0, 0, 1, 1, 1, 1 },
+  { 1, 2, 2, 2, 0, 0, 2, 2, 2, 1 },
+  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
+  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
+  { 2, 0, 0, 0, 0, 0, 0, 0, 0, 2 },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
+  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
+  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
+  { 1, 1, 1, 1, 0, 0, 1, 1, 1, 1 }
+};
+
+struct SpriteRender arenaWallTop, arenaWallSide, arenaFloor;
+
+void setupWallSprites(struct BMPImage *spritesheetImage) {
+  buildSpriteFromSpritesheet(
+    spritesheetImage,
+    &arenaWallTop,
+    0, 0, 20, 20
+  );
+
+  buildSpriteFromSpritesheet(
+    spritesheetImage,
+    &arenaWallSide,
+    20, 0, 20, 20
+  );
+
+  buildSpriteFromSpritesheet(
+    spritesheetImage,
+    &arenaFloor,
+    40, 0, 20, 20
+  );
+}
+
+void renderArenaTile(int x, int y) {
+  char tile;
+  struct SpriteRender *target;
+
+  tile = arenaLayout[y][x];
+
+  switch (tile) {
+    case 0:
+      target = &arenaFloor;
+      break;
+    case 1:
+      target = &arenaWallTop;
+      break;
+    case 2:
+      target = &arenaWallSide;
+      break;
+  }
+
+  target->x = x * 20;
+  target->y = y * 20;
+
+  drawSprite(target);
+}
+
+void drawOnlyArena(struct SpriteBounds *bounds) {
+  int leftTileX, rightTileX,
+      topTileY, bottomTileY;
+
+  leftTileX = bounds->left / TILE_SIZE;
+  rightTileX = bounds->right / TILE_SIZE;
+  topTileY = bounds->top / TILE_SIZE;
+  bottomTileY = bounds->bottom / TILE_SIZE;
+
+  renderArenaTile(leftTileX, topTileY);
+  renderArenaTile(rightTileX, topTileY);
+  renderArenaTile(rightTileX, bottomTileY);
+  renderArenaTile(leftTileX, bottomTileY);
+}
+
+void buildArena() {
+  int x, y;
+
+  for (y = 0; y < 10; ++y) {
+    for (x = 0; x < 10; ++x) {
+      renderArenaTile(x, y);
+    }
+  }
+}

arena.h

@@ -0,0 +1,6 @@
+#include "bmpload.h"
+#include "system/vga.h"
+
+void drawOnlyArena(struct SpriteBounds *bounds);
+void buildArena();
+void setupWallSprites(struct BMPImage *);

const.h

@@ -0,0 +1,5 @@
+#define TILE_SIZE (20)
+#define RAD2DEG (180/3.14159)
+#define DEG2RAD (3.14159/180)
+#define MOUSE_DISTANCE (32)
+

game.c

@@ -7,33 +7,14 @@
 #include "system/mouse_io.h"
 #include "system/pc_stuff.h"
 #include "bmpload.h"
+#include "const.h"
+#include "arena.h"
 
 struct BMPImage spritesheetImage;
 struct VGAColor vgaColors[256];
 
-struct SpriteRender arenaWallTop, arenaWallSide, arenaFloor;
 struct SpriteRender rabbit, mouse;
 
-void setupWallSprites() {
-  buildSpriteFromSpritesheet(
-    &spritesheetImage,
-    &arenaWallTop,
-    0, 0, 20, 20
-  );
-
-  buildSpriteFromSpritesheet(
-    &spritesheetImage,
-    &arenaWallSide,
-    20, 0, 20, 20
-  );
-
-  buildSpriteFromSpritesheet(
-    &spritesheetImage,
-    &arenaFloor,
-    40, 0, 20, 20
-  );
-}
-
 void setupRabbitSprites() {
   buildSpriteFromSpritesheet(
     &spritesheetImage,
@@ -54,52 +35,6 @@ void setupRabbitSprites() {
   mouse.offsetY = 4;
 }
 
-char arenaLayout[10][10] = {
-  { 1, 1, 1, 1, 0, 0, 1, 1, 1, 1 },
-  { 1, 2, 2, 2, 0, 0, 2, 2, 2, 1 },
-  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
-  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
-  { 2, 0, 0, 0, 0, 0, 0, 0, 0, 2 },
-  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
-  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
-  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
-  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
-  { 1, 1, 1, 1, 0, 0, 1, 1, 1, 1 }
-};
-
-void renderArenaTile(int x, int y) {
-  char tile;
-  struct SpriteRender *target;
-
-  tile = arenaLayout[y][x];
-
-  switch (tile) {
-    case 0:
-      target = &arenaFloor;
-      break;
-    case 1:
-      target = &arenaWallTop;
-      break;
-    case 2:
-      target = &arenaWallSide;
-      break;
-  }
-
-  target->x = x * 20;
-  target->y = y * 20;
-
-  drawSprite(target);
-}
-
-void buildArena() {
-  int x, y;
-
-  for (y = 0; y < 10; ++y) {
-    for (x = 0; x < 10; ++x) {
-      renderArenaTile(x, y);
-    }
-  }
-}
 
 #define RABBIT_MOTION_DRAG (2)
 #define RABBIT_MOTION_ACCELERATION (5)
@@ -186,75 +121,26 @@ void handleRabbitMovement() {
   }
 }
 
-#define TILE_SIZE (20)
-
 struct SpriteBounds bounds;
 
-char tileRenderQueue[400];
-
-void drawOnlyArena() {
-  int leftTileX, rightTileX,
-      topTileY, bottomTileY;
-
-  leftTileX = bounds.left / TILE_SIZE;
-  rightTileX = bounds.right / TILE_SIZE;
-  topTileY = bounds.top / TILE_SIZE;
-  bottomTileY = bounds.bottom / TILE_SIZE;
-
-  renderArenaTile(leftTileX, topTileY);
-  renderArenaTile(rightTileX, topTileY);
-  renderArenaTile(rightTileX, bottomTileY);
-  renderArenaTile(leftTileX, bottomTileY);
-}
-
 void drawOnlyMouseArena() {
   mouse.x = oldMousePosition[0];
   mouse.y = oldMousePosition[1];
   getSpriteBounds(&mouse, &bounds);
-  drawOnlyArena();
+  drawOnlyArena(&bounds);
 
   bounds.top = oldMouseDotPosition[1];
   bounds.bottom = oldMouseDotPosition[1];
   bounds.left = oldMouseDotPosition[0];
   bounds.right = oldMouseDotPosition[0];
-  drawOnlyArena();
+  drawOnlyArena(&bounds);
 }
 
 void drawOnlyRabbitArena() {
   rabbit.x = oldRabbitPosition[0];
   rabbit.y = oldRabbitPosition[1];
   getSpriteBounds(&rabbit, &bounds);
-  drawOnlyArena();
+  drawOnlyArena(&bounds);
-}
-
-#define RAD2DEG (180/3.14159)
-#define DEG2RAD (3.14159/180)
-#define MOUSE_DISTANCE (32)
-
-void calculateTargetAngle() {
-  float distanceX, distanceY;
-  float angle;
-
-  oldMouseDotPosition[0] = mouseDotPosition[0];
-  oldMouseDotPosition[1] = mouseDotPosition[1];
-
-  mouseDotPosition[0] = mouseStatus.xPosition;
-  mouseDotPosition[1] = mouseStatus.yPosition;
-
-  distanceX = mouseStatus.xPosition - rabbitPosition[0];
-  distanceY = mouseStatus.yPosition - rabbitPosition[1];
-
-  angle = atan2(distanceY, distanceX) * 180 / 3.14159 + 90;
-  if (angle < 0) angle += 360;
-
-  distanceX = sin(angle * DEG2RAD) * MOUSE_DISTANCE;
-  distanceY = -cos(angle * DEG2RAD) * MOUSE_DISTANCE;
-
-  oldMousePosition[0] = mousePosition[0];
-  oldMousePosition[1] = mousePosition[1];
-
-  mousePosition[0] = rabbitPosition[0] + distanceX;
-  mousePosition[1] = rabbitPosition[1] + distanceY;
 }
 
 int main(void) {
@@ -270,7 +156,7 @@ int main(void) {
 
   spritesheetImage.transparentColor = 0;
 
-  setupWallSprites();
+  setupWallSprites(&spritesheetImage);
   setupRabbitSprites();
 
   setVideoMode(VIDEO_MODE_VGA_256);

makefile

@@ -1,4 +1,4 @@
-obj = game.o bmpload.o
+obj = game.o bmpload.o arena.o
 
 all: system/system.lib game.exe .SYMBOLIC
 

movement.c

@@ -0,0 +1,28 @@
+#include "const.h"
+#include <math.h>
+
+void calculateTargetAngle() {
+  float distanceX, distanceY;
+  float angle;
+
+  oldMouseDotPosition[0] = mouseDotPosition[0];
+  oldMouseDotPosition[1] = mouseDotPosition[1];
+
+  mouseDotPosition[0] = mouseStatus.xPosition;
+  mouseDotPosition[1] = mouseStatus.yPosition;
+
+  distanceX = mouseStatus.xPosition - rabbitPosition[0];
+  distanceY = mouseStatus.yPosition - rabbitPosition[1];
+
+  angle = atan2(distanceY, distanceX) * 180 / 3.14159 + 90;
+  if (angle < 0) angle += 360;
+
+  distanceX = sin(angle * DEG2RAD) * MOUSE_DISTANCE;
+  distanceY = -cos(angle * DEG2RAD) * MOUSE_DISTANCE;
+
+  oldMousePosition[0] = mousePosition[0];
+  oldMousePosition[1] = mousePosition[1];
+
+  mousePosition[0] = rabbitPosition[0] + distanceX;
+  mousePosition[1] = rabbitPosition[1] + distanceY;
+}

movement.h

@@ -0,0 +1,3 @@
+struct RabbitPositioning {
+
+};