sectorview: door and button are flat panels facing their angle

1 files changed, 29 insertions, 8 deletions

diff --git a/examples/sectorview.c b/examples/sectorview.c
index beafc36..dadd0b1 100644
--- a/examples/sectorview.c
+++ b/examples/sectorview.c
@@ -41,10 +41,10 @@ typedef struct state {
 	kon_sectorMesh_t *mesh;
 	kon_image *images[MAX_TEXTURES];
 	kon_material_t materials[MAX_TEXTURES];
-	kon_image *marker;
 	kon_fp_t input; /* only used for the mouse and keys, the position is ours */
 	kon_world_t world;
 	kon_body_t body;
+	kon_material_t doorMaterial, buttonMaterial;
 	kon_vec3_t eye;
 	float feet; /* what the eyes follow, it catches up with the body after a step */
 	int door[MAX_ENTITIES]; /* the collider of a door entity, -1 for the others */
@@ -174,6 +174,23 @@ static void update(kon_program_t *program, double dt, void *user)
 	if (state->body.onGround == 0) state->feet = state->body.position.y;
 }
 
+/* a flat rectangle standing on the entity's position, facing the way it does. the door is a thing the program moves, so this is
+   all the engine knows about it. lift slides it up, the bottom edge is the entity's y (the middle for a small one) */
+static void drawPanel(kon_framebuffer_t *fb, kon_mat4_t vp, const kon_entity_t *e, float width, float height, float lift,
+	const kon_material_t *material, const kon_light_t *light)
+{
+	float rx = -cosf(e->angle) * width * 0.5f, rz = -sinf(e->angle) * width * 0.5f;
+	float bottom = e->position.y + lift - (height < 0.5f ? height * 0.5f : 0.0f);
+	kon_vec3_t normal = KON_VEC3(sinf(e->angle), 0.0f, -cosf(e->angle));
+	kon_vertex_t bl = { KON_VEC3(e->position.x - rx, bottom, e->position.z - rz), normal, KON_VEC2(0, 1) };
+	kon_vertex_t br = { KON_VEC3(e->position.x + rx, bottom, e->position.z + rz), normal, KON_VEC2(1, 1) };
+	kon_vertex_t tr = { KON_VEC3(e->position.x + rx, bottom + height, e->position.z + rz), normal, KON_VEC2(1, 0) };
+	kon_vertex_t tl = { KON_VEC3(e->position.x - rx, bottom + height, e->position.z - rz), normal, KON_VEC2(0, 0) };
+
+	kon_drawTriangle3D(fb, vp, bl, br, tr, material, light, KON_RENDER_DEPTH);
+	kon_drawTriangle3D(fb, vp, bl, tr, tl, material, light, KON_RENDER_DEPTH);
+}
+
 static void draw(kon_program_t *program, kon_framebuffer_t *game, void *user)
 {
 	state_t *state = user;
@@ -197,13 +214,17 @@ static void draw(kon_program_t *program, kon_framebuffer_t *game, void *user)
 	light.ambient = 0.5f;
 	kon_sectorDraw(game, &camera, state->mesh, state->materials, state->map->textureCount, &light);
 
-	/* things without a picture of their own are shown as markers, a door slides up as it opens */
 	for (i = 0; i < state->map->entityCount; i++) {
 		const kon_entity_t *e = &state->map->entities[i];
-		float lift = i < MAX_ENTITIES ? state->open[i] * 1.5f : 0.0f;
 
-		if (strcmp(e->kind, "spawn") == 0 || strcmp(e->kind, "light") == 0) continue;
-		kon_drawBillboard(game, vp, KON_VEC3(e->position.x, e->position.y + lift, e->position.z), 0.3f, 0.4f, state->marker, KON_RECT(0, 0, 0, 0), 1.0f, KON_RENDER_DEPTH);
+		if (strcmp(e->kind, "door") == 0) {
+			float width = kon_entityFloat(e, "width", 1.2f), height = kon_entityFloat(e, "height", 2.2f);
+			float lift = i < MAX_ENTITIES ? state->open[i] * height : 0.0f;
+
+			drawPanel(game, vp, e, width, height, lift, &state->doorMaterial, &light);
+		} else if (strcmp(e->kind, "button") == 0) {
+			drawPanel(game, vp, e, 0.2f, 0.2f, 0.0f, &state->buttonMaterial, &light);
+		}
 	}
 
 	kon_fillRectangle(game, game->width / 2 - 3, game->height / 2, 7, 1, COL_NOTE);
@@ -229,8 +250,7 @@ static int init(kon_program_t *program, void *user)
 		return 0;
 	}
 	state->mesh = kon_sectorBuild(state->map);
-	state->marker = makeMarker();
-	if (!state->mesh || !state->marker || state->map->textureCount > MAX_TEXTURES) return 0;
+	if (!state->mesh || state->map->textureCount > MAX_TEXTURES) return 0;
 
 	for (i = 0; i < state->map->textureCount; i++) {
 		state->images[i] = makeTexture(state->map->textures[i]);
@@ -248,6 +268,8 @@ static int init(kon_program_t *program, void *user)
 			break;
 		}
 	}
+	state->doorMaterial = kon_materialColor(0xFF8A7A50);
+	state->buttonMaterial = kon_materialColor(0xFFF2A7C3);
 	kon_worldInit(&state->world);
 	state->world.sectors = state->map;
 	for (i = 0; i < MAX_ENTITIES; i++) state->door[i] = -1;
@@ -278,7 +300,6 @@ static void shutdown(kon_program_t *program, void *user)
 
 	(void)program;
 	for (i = 0; i < state->map->textureCount; i++) kon_freeFramebuffer(state->images[i]);
-	kon_freeFramebuffer(state->marker);
 	kon_sectorMeshFree(state->mesh);
 	kon_worldFree(&state->world);
 	kon_sectorFree(state->map);