simplify camera

scripts/camera2d.jso

@@ -8,16 +8,4 @@ this.right = function() { return this.pos.x + (window.rendersize.x/2); }
 
 this.left = function() { return this.pos.x - (window.rendersize.x/2); }
 
-this.mixin({
-  get zoom() {
-//    var z = game.native.y / window.dimensions.y;
-    return render.get_zoom(); // /z
-  },
-
-  set zoom(x) {
-    x = Math.clamp(x,0.1,10);
-//    var z = game.native.y / window.dimensions.y;
-//    z *= x;
-    render.add_zoom(x);
-  },
-});
+this.zoom = 1;

scripts/editor.js

@@ -31,8 +31,6 @@ var editor = {
 
   get_this() { return this.edit_level; },
 
-  get_that() { return this.selectlist.length === 1 ? this.selectlist[0] : this.get_this(); },
-
   try_select() { /* nullify true if it should set selected to null if it doesn't find an object */
     var go = physics.pos_query(Mouse.worldpos());
     return this.do_select(go);
@@ -237,13 +235,9 @@ var editor = {
     this.selectlist = [];
     editor.camera = world.spawn("scripts/camera2d.jso");
     editor.camera._ed.selectable = false;
-    game.view_camera(editor.camera);
+    game.camera = editor.camera;
   },
-
-  end_debug() {
-    
-  },
-   
+  
   openpanel(panel) {
     if (this.curpanel) {
       this.curpanel.close();

scripts/engine.js

@@ -188,7 +188,10 @@ function process()
     prosperon.physupdate(phys_step*timescale);
   }
 
-  prosperon.window_render();
+  if (!game.camera)  
+    prosperon.window_render(world, 1);
+  else
+    prosperon.window_render(game.camera, game.camera.zoom);
   render.sprites();
   render.models();
   render.emitters();
@@ -221,7 +224,6 @@ game.doc.stop = "Stop game simulation. This does the same thing as 'pause', and
 game.doc.play = "Resume or start game simulation.";
 game.doc.editor_mode = "Set to true for the game to only update on input; otherwise the game updates every frame.";
 game.doc.dt = "Current frame dt.";
-game.doc.view_camera = "Set the camera for the current view.";
 game.doc.camera = "Current camera.";
 
 prosperon.semver = {};
@@ -433,17 +435,11 @@ function world_start() {
   world.ur = "world";
   world.kill = function() { this.clear(); };
   world.phys = 2;
-  var cam = world.spawn("scripts/camera2d.jso");
-  game.view_camera(cam);
+  world.zoom = 1;
+  game.cam = world;
 }
 
 global.mixin("scripts/physics.js");
 
-game.view_camera = function(cam)
-{
-  game.camera = cam;
-  render.cam_body(game.camera);
-}
-
 window.title = `Prosperon v${prosperon.version}`;
 window.size = [500,500];

scripts/physics.js

@@ -1,7 +1,7 @@
 /* On collisions, entities are sent a 'hit' object, which looks like this: 
 var HIT = {
   normal: "The normal of the collision point.",
-  hit: "The gameobject of the object that collided.",
+  obj: "The gameobject of the object that collided.",
   sensor: "Boolean for if the colliding object was a sensor.",
   velocity: "Velocity of the contact.",
   pos: "Position in world space of the contact.",

source/engine/debug/debugdraw.c

@@ -546,8 +546,8 @@ void draw_box(HMM_Vec2 c, HMM_Vec2 wh, struct rgba color)
 
 void draw_grid(float width, float span, struct rgba color)
 {
-  HMM_Vec2 offset = (HMM_Vec2)cam_pos();
-  offset = HMM_MulV2F(offset, 1/cam_zoom());
+  HMM_Vec2 offset = campos;
+  offset = HMM_MulV2F(offset, 1/camzoom);
 
   float ubo[4];
   ubo[0] = offset.x;
@@ -562,7 +562,7 @@ void draw_grid(float width, float span, struct rgba color)
 
   fs_params_t pt;
   pt.thickness = (float)width;
-  pt.span = span/cam_zoom();
+  pt.span = span/camzoom;
   memcpy(&pt.color, col, sizeof(float)*4);
   sg_apply_uniforms(SG_SHADERSTAGE_VS, 0, SG_RANGE_REF(ubo));
   sg_apply_uniforms(SG_SHADERSTAGE_FS, 0, SG_RANGE_REF(pt));

source/engine/jsffi.c

@@ -844,16 +844,10 @@ JSC_CCALL(render_commit, sg_commit(); debug_newframe();)
 JSC_SCALL(render_text_size, ret = bb2js(text_bb(str, js2number(argv[1]), js2number(argv[2]), 1)))
 JSC_SCALL(render_gif_times, ret = ints2js(gif_delays(str)))
 JSC_SCALL(render_gif_frames, ret = number2js(gif_nframes(str)))
-JSC_CCALL(render_cam_body, set_cam_body(js2gameobject(argv[0])->body))
-JSC_CCALL(render_add_zoom, add_zoom(js2number(argv[0])))
-JSC_CCALL(render_get_zoom, return number2js(cam_zoom()))
 JSC_CCALL(render_world2screen, return vec22js(world2screen(js2vec2(argv[0]))))
 JSC_CCALL(render_screen2world, return vec22js(screen2world(js2vec2(argv[0]))))
 
 static const JSCFunctionListEntry js_render_funcs[] = {
-  MIST_FUNC_DEF(render,cam_body, 1),
-  MIST_FUNC_DEF(render,add_zoom,1),
-  MIST_FUNC_DEF(render,get_zoom,0),
   MIST_FUNC_DEF(render,world2screen,1),
   MIST_FUNC_DEF(render,screen2world,1),
   MIST_FUNC_DEF(render,gif_frames,1),
@@ -982,7 +976,7 @@ static const JSCFunctionListEntry js_input_funcs[] = {
 
 JSC_CCALL(prosperon_emitters_step, emitters_step(js2number(argv[0])))
 JSC_CCALL(prosperon_phys2d_step, phys2d_update(js2number(argv[0])))
-JSC_CCALL(prosperon_window_render, openglRender(&mainwin))
+JSC_CCALL(prosperon_window_render, openglRender(&mainwin, js2gameobject(argv[0]), js2number(argv[1])))
 
 static const JSCFunctionListEntry js_prosperon_funcs[] = {
   MIST_FUNC_DEF(prosperon, emitters_step, 1),

source/engine/render.c

@@ -26,6 +26,9 @@
 
 #include "msf_gif.h"
 
+HMM_Vec2 campos = {0,0};
+float camzoom = 1;
+
 static struct {
   sg_swapchain swap;
   sg_pipeline pipe;
@@ -356,18 +359,10 @@ void render_init() {
 
 }
 
-static cpBody *camera = NULL;
-void set_cam_body(cpBody *body) { camera = body; }
-cpVect cam_pos() { return camera ? cpBodyGetPosition(camera) : cpvzero; }
-
-static float zoom = 1.f;
-float cam_zoom() { return zoom; }
-void add_zoom(float val) { zoom = val; }
-
 HMM_Vec2 world2screen(HMM_Vec2 pos)
 {
-  pos = HMM_SubV2(pos, HMM_V2(cam_pos().x, cam_pos().y));
-  pos = HMM_ScaleV2(pos, 1.0/zoom);
+  pos = HMM_SubV2(pos, campos);
+  pos = HMM_ScaleV2(pos, 1.0/camzoom);
   pos = HMM_AddV2(pos, HMM_ScaleV2(mainwin.size,0.5));
   return pos;
 }
@@ -376,8 +371,8 @@ HMM_Vec2 screen2world(HMM_Vec2 pos)
 {
   pos = HMM_ScaleV2(pos, 1/mainwin.dpi);
   pos = HMM_SubV2(pos, HMM_ScaleV2(mainwin.size, 0.5));
-  pos = HMM_ScaleV2(pos, zoom);
-  pos = HMM_AddV2(pos, HMM_V2(cam_pos().x, cam_pos().y));
+  pos = HMM_ScaleV2(pos, camzoom);
+  pos = HMM_AddV2(pos, campos);
   return pos;
 }
 
@@ -415,7 +410,7 @@ void full_3d_pass(struct window *window)
   sg_apply_uniforms(SG_SHADERSTAGE_VS, 0, SG_RANGE_REF(subo));
 }
 
-void openglRender(struct window *window) {
+void openglRender(struct window *window, gameobject *cam, float zoom) {
   sg_swapchain sch = sglue_swapchain();
   sg_begin_pass(&(sg_pass){
     .action = pass_action,
@@ -450,13 +445,14 @@ void openglRender(struct window *window) {
   }
 
   // 2D projection
-  cpVect pos = cam_pos();
+  campos = go_pos(cam);
+  camzoom = zoom;
 
   projection = HMM_Orthographic_LH_NO(
-             pos.x - zoom * usesize.x / 2,
-             pos.x + zoom * usesize.x / 2,
-             pos.y - zoom * usesize.y / 2,
-             pos.y + zoom * usesize.y / 2, -10000.f, 10000.f);
+             campos.x - camzoom * usesize.x / 2,
+             campos.x + camzoom * usesize.x / 2,
+             campos.y - camzoom * usesize.y / 2,
+             campos.y + camzoom * usesize.y / 2, -10000.f, 10000.f);
 
   hudproj = HMM_Orthographic_LH_ZO(0, usesize.x, 0, usesize.y, -1.f, 1.f);
 

source/engine/render.h

@@ -14,6 +14,7 @@
 
 #include "sokol/sokol_gfx.h"
 #include "HandmadeMath.h"
+#include "gameobject.h"
 
 #define RGBA_MAX 255
 
@@ -52,17 +53,16 @@ enum RenderMode {
 };
 
 void render_init();
-void openglRender(struct window *window);
+extern HMM_Vec2 campos;
+extern float camzoom;
+
+void openglRender(struct window *window, gameobject *cam, float zoom);
 void opengl_rendermode(enum RenderMode r);
 
 void openglInit3d(struct window *window);
 void openglRender3d(struct window *window, camera3d *camera);
 void capture_screen(int x, int y, int w, int h, const char *path);
 
-void set_cam_body(cpBody *body);
-cpVect cam_pos();
-float cam_zoom();
-void add_zoom(float val);
 HMM_Vec2 world2screen(HMM_Vec2 pos);
 HMM_Vec2 screen2world(HMM_Vec2 pos);
 

source/engine/sprite.c

@@ -207,8 +207,8 @@ void sprite_draw(struct sprite *sprite) {
   if (!sprite->go) t = t2d_unit;
   else t = go2t(sprite->go);
   
-  t.pos.x += (cam_pos().x - (cam_pos().x/sprite->parallax));
-  t.pos.y += (cam_pos().y - (cam_pos().y/sprite->parallax));
+  t.pos.x += (campos.x - (campos.x/sprite->parallax));
+  t.pos.y += (campos.y - (campos.y/sprite->parallax));
   HMM_Mat3 m = transform2d2mat(t);
   HMM_Mat3 sm = transform2d2mat(sprite2t(sprite));
   tex_draw(sprite->tex, HMM_MulM3(m,sm), sprite->frame, sprite->color, sprite->drawmode, (HMM_Vec2){0,0}, sprite->scale, sprite->emissive, sprite->parallax);