Day 44 complete

project/codegen/engine_gen.cpp

@@ -26,7 +26,7 @@ constexpr StrC fname_vec_header = txt("vectors.hpp");
 
 #pragma push_macro("scast")
 #undef scast
-constexpr char const* vec2_ops = stringize(
+constexpr char const* vec2f_ops = stringize(
 	template<>
 	constexpr <type> tmpl_zero< <type> >() {
 		return { 0, 0 };
@@ -62,6 +62,116 @@ constexpr char const* vec2_ops = stringize(
 		return result;
 	}
 
+	inline
+	<unit_type> scalar_product( <type> a, <type> b )
+	{
+		<unit_type> result = a.x * b.x + a.y * b.y;
+		return result;
+	}
+
+	inline
+	<type> operator - ( <type> v ) {
+		<type> result {
+			- v.x,
+			- v.y
+		};
+		return result;
+	}
+
+	inline
+	<type> operator + ( <type> a, <type> b ) {
+		<type> result {
+			a.x + b.x,
+			a.y + b.y
+		};
+		return result;
+	}
+
+	inline
+	<type> operator - ( <type> a, <type> b ) {
+		<type> result {
+			a.x - b.x,
+			a.y - b.y
+		};
+		return result;
+	}
+
+	inline
+	<type> operator * ( <type> v, <unit_type> s ) {
+		<type> result {
+			v.x * s,
+			v.y * s
+		};
+		return result;
+	}
+
+	inline
+	<type> operator * ( <unit_type> s, <type> v ) {
+		<type> result {
+			v.x * s,
+			v.y * s
+		};
+		return result;
+	}
+
+	inline
+	<type> operator / ( <type> v, <unit_type> s ) {
+		<type> result {
+			v.x / s,
+			v.y / s
+		};
+		return result;
+	}
+
+	inline
+	<type>& operator += ( <type>& a, <type> b ) {
+		a.x += b.x;
+		a.y += b.y;
+		return a;
+	}
+	inline
+	<type>& operator -= ( <type>& a, <type> b ) {
+		a.x -= b.x;
+		a.y -= b.y;
+		return a;
+	}
+
+	inline
+	<type>& operator *= ( <type>& v, <unit_type> s ) {
+		v.x *= s;
+		v.y *= s;
+		return v;
+	}
+
+	inline
+	<type>& operator /= ( <type>& v, <unit_type> s ) {
+		v.x /= s;
+		v.y /= s;
+		return v;
+	}
+);
+
+constexpr char const* vec2i_ops = stringize(
+	template<>
+	constexpr <type> tmpl_zero< <type> >() {
+		return { 0, 0 };
+	}
+
+	inline
+	<type> abs( <type> v ) {
+		<type> result {
+			abs( v.x ),
+			abs( v.y )
+		};
+		return result;
+	}
+
+	inline
+	<unit_type> magnitude( <type> v ) {
+		<unit_type> result = sqrt( v.x * v.x + v.y * v.y );
+		return result;
+	}
+
 	inline
 	<type> operator - ( <type> v ) {
 		<type> result {
@@ -145,8 +255,8 @@ constexpr char const* vec2_ops = stringize(
 );
 #pragma pop_macro("scast")
 
-#define gen_vec2( vec_name, type ) gen__vec2( txt( stringize(vec_name) ), txt( stringize(type) ) )
+#define gen_vec2f( vec_name, type ) gen__vec2f( txt( stringize(vec_name) ), txt( stringize(type) ) )
-CodeBody gen__vec2( StrC vec_name, StrC type )
+CodeBody gen__vec2f( StrC vec_name, StrC type )
 {
 	CodeStruct vec_struct = parse_struct( token_fmt( "type", vec_name, "unit_type", type, stringize(
 		struct <type>
@@ -161,7 +271,33 @@ CodeBody gen__vec2( StrC vec_name, StrC type )
 		};
 	)));
 
-	CodeBody vec_ops = parse_global_body( token_fmt( "type", vec_name, "unit_type", type, vec2_ops) );
+	CodeBody vec_ops = parse_global_body( token_fmt( "type", vec_name, "unit_type", type, vec2f_ops) );
+	CodeBody vec_def = def_global_body( args(
+		vec_struct,
+		fmt_newline,
+		vec_ops
+	));
+
+	return vec_def;
+}
+
+#define gen_vec2i( vec_name, type ) gen__vec2i( txt( stringize(vec_name) ), txt( stringize(type) ) )
+CodeBody gen__vec2i( StrC vec_name, StrC type )
+{
+	CodeStruct vec_struct = parse_struct( token_fmt( "type", vec_name, "unit_type", type, stringize(
+		struct <type>
+		{
+			union {
+				struct {
+					<unit_type> x;
+					<unit_type> y;
+				};
+				<unit_type> Basis[2];
+			};
+		};
+	)));
+	
+	CodeBody vec_ops = parse_global_body( token_fmt( "type", vec_name, "unit_type", type, vec2i_ops) );
 	CodeBody vec_def = def_global_body( args(
 		vec_struct,
 		fmt_newline,
@@ -208,7 +344,7 @@ Code gen__phys2( StrC type )
 		}
 	);
 	CodeBody pos_struct = parse_global_body( token_fmt( "type", (StrC)sym_pos, "unit_type", type, "vec_type", (StrC)sym_vec, tmpl_struct ));
-	CodeBody pos_ops    = parse_global_body( token_fmt( "type", (StrC)sym_pos, "unit_type", type, vec2_ops ));
+	CodeBody pos_ops    = parse_global_body( token_fmt( "type", (StrC)sym_pos, "unit_type", type, vec2f_ops ));
 
 	CodeBody dir_struct = parse_global_body( token_fmt(
 		"type", (StrC)sym_dir,
@@ -270,10 +406,10 @@ Code gen__phys2( StrC type )
 	)));
 
 	CodeBody vel_struct = parse_global_body( token_fmt( "type", (StrC)sym_vel, "unit_type", type, "vec_type", (StrC)sym_vec, tmpl_struct ));
-	CodeBody vel_ops    = parse_global_body( token_fmt( "type", (StrC)sym_vel, "unit_type", type, vec2_ops ));
+	CodeBody vel_ops    = parse_global_body( token_fmt( "type", (StrC)sym_vel, "unit_type", type, vec2f_ops ));
 
 	CodeBody accel_struct = parse_global_body( token_fmt( "type", (StrC)sym_accel, "unit_type", type, "vec_type", (StrC)sym_vec, tmpl_struct ));
-	CodeBody accel_ops    = parse_global_body( token_fmt( "type", (StrC)sym_accel, "unit_type", type, vec2_ops ));
+	CodeBody accel_ops    = parse_global_body( token_fmt( "type", (StrC)sym_accel, "unit_type", type, vec2f_ops ));
 
 	// TODO(Ed): Is there a better name for this?
 	Code ops = parse_global_body( token_fmt(
@@ -383,16 +519,11 @@ int gen_main()
 
 		CodeUsing using_vec2  = parse_using( code( using Vec2  = Vec2_f32; ));
 		CodeUsing using_vec2i = parse_using( code( using Vec2i = Vec2_s32; ));
-		vec_header.print( gen_vec2( Vec2_f32, f32) );
+		vec_header.print( gen_vec2f( Vec2_f32, f32) );
-		vec_header.print( gen_vec2( Vec2_s32, s32) );
+		vec_header.print( gen_vec2i( Vec2_s32, s32) );
 		vec_header.print( using_vec2 );
 		vec_header.print( using_vec2i );
 
-		CodeUsing using_vec3  = parse_using( code( using Vec2  = Vec3_f32; ));
-		CodeUsing using_vec3i = parse_using( code( using Vec2i = Vec3_f32; ));
-
-		// vec_header.print( using_vec3 );
-		
 //		vec_header.print_fmt( "NS_ENGINE_END\n" );
 		vec_header.write();
 	}

project/codegen/engine_postbuild_gen.cpp

@@ -23,16 +23,17 @@ using namespace gen;
 #include "platform/generics.hpp"
 #include "platform/types.hpp"
 #include "platform/intrinsics.hpp"
+#include "platform/float_ops.hpp"
 #include "platform/strings.hpp"
 #include "platform/platform.hpp"
 
 #include "engine/engine_module.hpp"
 #include "engine/gen/vectors.hpp"
-#include "engine/gen/physics.hpp"
 #include "engine/input.hpp"
 #include "engine/tile_map.hpp"
 #include "engine/engine.hpp"
 #include "engine/engine_to_platform_api.hpp"
+#include "engine/gen/physics.hpp"
 
 constexpr StrC fname_handmade_engine_symbols = txt("handmade_engine.symbols");
 

project/engine/engine.cpp

@@ -892,13 +892,18 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 		player->move_velocity += player_move_accel * 0.5f;
 		new_player_pos        += player->move_velocity;
 
-		b32 valid_new_pos = true;
+		b32 collision_nw = false;
+		b32 collision_ne = false;
+		b32 collision_sw = false;
+		b32 collision_se = false;
+		do
 		{
-			TileMapPos test_pos = {
+			// Base position
-				new_player_pos.x, new_player_pos.y,
+			//TileMapPos test_pos = {
-				player->position.tile_x, player->position.tile_y, player->position.tile_z
+				//new_player_pos.x, new_player_pos.y,
-			};
+				//player->position.tile_x, player->position.tile_y, player->position.tile_z
-			test_pos = recannonicalize_position( tile_map, test_pos );
+			//};
+			//test_pos = recannonicalize_position( tile_map, test_pos );
 
 			// TODO(Ed) : Need a delta-function that auto-reconnonicalizes.
 
@@ -907,32 +912,66 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 				player->position.tile_x, player->position.tile_y, player->position.tile_z
 			};
 			test_pos_nw  = recannonicalize_position( tile_map, test_pos_nw );
-			valid_new_pos    &= TileMap_is_point_empty( tile_map, test_pos_nw );
+			collision_nw = ! TileMap_is_point_empty( tile_map, test_pos_nw );
 
 			TileMapPos test_pos_ne {
 				new_player_pos.x + player_half_width, new_player_pos.y + player_quarter_height,
 				player->position.tile_x, player->position.tile_y, player->position.tile_z
 			};
 			test_pos_ne  = recannonicalize_position( tile_map, test_pos_ne );
-			valid_new_pos &= TileMap_is_point_empty( tile_map, test_pos_ne );
+			collision_ne = ! TileMap_is_point_empty( tile_map, test_pos_ne );
 
 			TileMapPos test_pos_sw {
 				new_player_pos.x - player_half_width, new_player_pos.y,
 				player->position.tile_x, player->position.tile_y, player->position.tile_z
 			};
 			test_pos_sw  = recannonicalize_position( tile_map, test_pos_sw );
-			valid_new_pos &= TileMap_is_point_empty( tile_map, test_pos_sw );
+			collision_sw = ! TileMap_is_point_empty( tile_map, test_pos_sw );
 
 			TileMapPos test_pos_se {
 				new_player_pos.x + player_half_width, new_player_pos.y,
 				player->position.tile_x, player->position.tile_y, player->position.tile_z
 			};
 			test_pos_se  = recannonicalize_position( tile_map, test_pos_se );
-			valid_new_pos &= TileMap_is_point_empty( tile_map, test_pos_se );
+			collision_se = ! TileMap_is_point_empty( tile_map, test_pos_se );
+		} 
+		while(0);
+
+		if ( collision_se || collision_sw || collision_ne || collision_nw )
+		{
+			// Should be colliding with a wall
+			
+			Vec2 wall_vector = { 0, 0 };
+			if ( collision_nw && collision_sw )
+			{
+				wall_vector = { 1.f, 0.f };
+			}
+			if ( collision_ne && collision_se )
+			{
+				wall_vector = { -1.f, 0.f };
+			}
+			if ( collision_nw && collision_ne )
+			{
+				wall_vector = { 0.f, 1.f };
+			}
+			if ( collision_se && collision_sw )
+			{
+				wall_vector = { 0.f, -1.f };
+			}
+			
+			//if ( collision_nw && !collision_ne && !collision_sw && !collision_se )
+			//{
+			//	wall_vector = { 1.f, 1.f };
+			//}
+			
+			// The 2x multiplier allows for the the "bounce off" velocity to occur instead of the player just looking like they impacted the wall and stopped
+			player->move_velocity -= cast( Vel2,  1.f * scalar_product( Vec2( player->move_velocity ), wall_vector ) * wall_vector );
+			
+			
+			new_player_pos = { player->position.rel_pos.x, player->position.rel_pos.y };
+			new_player_pos += player->move_velocity;
 		}
 		
-		if ( valid_new_pos )
-		{
 		TileMapPos new_pos = {
 			new_player_pos.x, new_player_pos.y,
 			player->position.tile_x, player->position.tile_y, player->position.tile_z
@@ -972,7 +1011,6 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 		{
 			game_state->hero_direction = HeroBitmaps_Left;
 		}
-		}
 
 		if ( player->jump_time > 0.f )
 		{

project/engine/gen/physics.hpp

@@ -60,6 +60,12 @@ inline Pos2_f32 normalize( Pos2_f32 v )
 	return result;
 }
 
+inline f32 scalar_product( Pos2_f32 a, Pos2_f32 b )
+{
+	f32 result = a.x * b.x + a.y * b.y;
+	return result;
+}
+
 inline Pos2_f32 operator-( Pos2_f32 v )
 {
 	Pos2_f32 result { -v.x, -v.y };
@@ -189,6 +195,12 @@ inline Vel2_f32 normalize( Vel2_f32 v )
 	return result;
 }
 
+inline f32 scalar_product( Vel2_f32 a, Vel2_f32 b )
+{
+	f32 result = a.x * b.x + a.y * b.y;
+	return result;
+}
+
 inline Vel2_f32 operator-( Vel2_f32 v )
 {
 	Vel2_f32 result { -v.x, -v.y };
@@ -308,6 +320,12 @@ inline Accel2_f32 normalize( Accel2_f32 v )
 	return result;
 }
 
+inline f32 scalar_product( Accel2_f32 a, Accel2_f32 b )
+{
+	f32 result = a.x * b.x + a.y * b.y;
+	return result;
+}
+
 inline Accel2_f32 operator-( Accel2_f32 v )
 {
 	Accel2_f32 result { -v.x, -v.y };

project/engine/gen/vectors.hpp

@@ -49,6 +49,12 @@ inline Vec2_f32 normalize( Vec2_f32 v )
 	return result;
 }
 
+inline f32 scalar_product( Vec2_f32 a, Vec2_f32 b )
+{
+	f32 result = a.x * b.x + a.y * b.y;
+	return result;
+}
+
 inline Vec2_f32 operator-( Vec2_f32 v )
 {
 	Vec2_f32 result { -v.x, -v.y };
@@ -145,18 +151,6 @@ inline s32 magnitude( Vec2_s32 v )
 	return result;
 }
 
-inline Vec2_s32 normalize( Vec2_s32 v )
-{
-	s32 square_size = v.x * v.x + v.y * v.y;
-	if ( square_size < scast( s32, 1e-4 ) )
-	{
-		return Zero( Vec2_s32 );
-	}
-	s32      mag = sqrt( square_size );
-	Vec2_s32 result { v.x / mag, v.y / mag };
-	return result;
-}
-
 inline Vec2_s32 operator-( Vec2_s32 v )
 {
 	Vec2_s32 result { -v.x, -v.y };

project/platform/compiler_ignores.hpp

@@ -15,6 +15,7 @@
 #pragma warning( disable: 4710 ) // Support automatic inline expansion
 #pragma warning( disable: 4805 ) // Support comparisons of s32 to bool.
 #pragma warning( disable: 5246 ) // Support for initialization of subobject without braces.
+#pragma warning( disable: 4701 ) // Support for potentially uninitalized variables
 #endif
 
 #ifdef __clang__