Add Godot client

6 files changed, 203 insertions, 1 deletions

diff --git a/lib/build.sh b/lib/build.sh
index 13aaf8e..8cf9d11 100755
--- a/lib/build.sh
+++ b/lib/build.sh
@@ -8,7 +8,7 @@ fail() {
 CC=cc
 CFLAGS="-std=c99 -Wall -Wextra -Wpedantic -D_POSIX_C_SOURCE=200809L"
 LDFLAGS="-fPIC"
-SOURCES="test.c"
+SOURCES="test.c vec2.c world.c"
 output="build"
 
 for arg ; do
diff --git a/lib/test.c b/lib/test.c
index 78a0d02..70b32fa 100644
--- a/lib/test.c
+++ b/lib/test.c
@@ -7,3 +7,18 @@ dp_hello_world()
 {
 	printf("Hello World\n");
 }
+
+int
+dp_get_num()
+{
+	return 1;
+}
+
+vec2
+dp_get_vec2()
+{
+	vec2 vec;
+	vec.x = 1.0f;
+	vec.y = 2.5f;
+	return vec;
+}
diff --git a/lib/types.h b/lib/types.h
index afffd4f..0619c8a 100644
--- a/lib/types.h
+++ b/lib/types.h
@@ -2,3 +2,9 @@ typedef struct {
 	float x;
 	float y;
 } vec2;
+
+vec2 dp_vec2_new(float, float);
+vec2 dp_vec2_add(vec2, vec2);
+vec2 dp_vec2_sub(vec2, vec2);
+vec2 dp_vec2_mul(vec2, float scalar);
+vec2 dp_vec2_dot(vec2, vec2);
diff --git a/lib/vec2.c b/lib/vec2.c
new file mode 100644
index 0000000..b417e9c
--- /dev/null
+++ b/lib/vec2.c
@@ -0,0 +1,46 @@
+#include "types.h"
+
+vec2
+dp_vec2_new(float x, float y)
+{
+	vec2 new;
+	new.x = x;
+	new.y = y;
+	return new;
+}
+
+vec2
+dp_vec2_add(vec2 a, vec2 b)
+{
+	vec2 new;
+	new.x = a.x + b.x;
+	new.y = a.y + b.y;
+	return new;
+}
+
+vec2
+dp_vec2_sub(vec2 a, vec2 b)
+{
+	vec2 new;
+	new.x = a.x - b.x;
+	new.y = a.y - b.y;
+	return new;
+}
+
+vec2
+dp_vec2_mul(vec2 vec, float scalar)
+{
+	vec2 new;
+	new.x = vec.x * scalar;
+	new.y = vec.y * scalar;
+	return new;
+}
+
+vec2
+dp_vec2_dot(vec2 a, vec2 b)
+{
+	vec2 dot;
+	dot.x = a.x * b.x;
+	dot.y = a.y * b.y;
+	return dot;
+}
diff --git a/lib/world.c b/lib/world.c
new file mode 100644
index 0000000..954aa94
--- /dev/null
+++ b/lib/world.c
@@ -0,0 +1,104 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "types.h"
+#include "world.h"
+
+struct world {
+	struct entity entities[WORLD_MAX_ENTITIES];
+};
+
+struct world *
+dp_world_create()
+{
+	struct world *w;
+
+	if (!(w = malloc(sizeof(*w))))
+		return NULL;
+	memset(w, 0, sizeof(*w));
+
+	return w;
+}
+
+void
+dp_free_world(struct world *w)
+{
+	if (w)
+		free(w);
+}
+
+int
+dp_world_create_entity(struct world *w, int kind)
+{
+	int i;
+	struct entity *e;
+
+	if (!w)
+		return -1;
+	if (kind == ENTITY_NONE)
+		return -1;
+	
+	for (i = 0; i < WORLD_MAX_ENTITIES; i++) {
+		e = &w->entities[i];
+		if (e->kind != ENTITY_NONE)
+			continue;
+		e->kind = kind;
+		return i;
+	}
+
+	return -1;
+}
+
+struct entity *
+dp_world_find_entity(struct world *w, int entity_id)
+{
+	struct entity *e;
+
+	if (!w || entity_id < 0)
+		return NULL;
+	if (entity_id >= WORLD_MAX_ENTITIES)
+		return NULL;
+
+	e = &w->entities[entity_id];
+	
+	if (e->kind == ENTITY_NONE)
+		return NULL;
+
+	return e;
+}
+
+int
+dp_world_remove_entity(struct world *w, int entity_id)
+{
+	struct entity *e;
+
+	if (!(e = dp_world_find_entity(w, entity_id)))
+		return -1;
+
+	memset(e, 0, sizeof(*e));
+	e->kind = ENTITY_NONE;
+	return 0;
+}
+
+int
+dp_world_tick(struct world *w, double delta)
+{
+	int i;
+	struct entity *e;
+	struct entity_ball *ball;
+	
+	for (i = 0; i < WORLD_MAX_ENTITIES; i++)
+	{
+		e = &w->entities[i];
+		switch (e->kind) {
+		case ENTITY_BALL:
+			ball = &e->e.ball;
+			/*ball->pos = dp_vec2_new(500.0, 500.0);*/
+			ball->pos = dp_vec2_add(ball->pos, dp_vec2_mul(ball->vel, delta));
+			break;
+		default:
+			break;
+		}
+	}
+	return 0;
+}
diff --git a/lib/world.h b/lib/world.h
new file mode 100644
index 0000000..40c3fef
--- /dev/null
+++ b/lib/world.h
@@ -0,0 +1,31 @@
+#define WORLD_MAX_ENTITIES 5000
+
+enum {
+	ENTITY_NONE,
+	ENTITY_BALL
+};
+
+struct entity_ball {
+	vec2 pos;
+	vec2 vel;
+};
+
+union entity_union {
+	struct entity_ball ball;
+};
+
+struct entity {
+	int kind;
+	union entity_union e;
+};
+
+struct world;
+
+struct world *dp_world_create();
+void dp_world_free(struct world *);
+
+int dp_world_create_entity(struct world *, int kind);
+struct entity *dp_world_find_entity(struct world *, int entity_id);
+int dp_world_remove_entity(struct world *, int entity_id);
+
+int dp_world_tick(struct world *, double delta);