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make input coordinates respect the viewport

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This commit is contained in:
veclavtalica 2024-12-24 10:24:50 +03:00
parent 190eb1f107
commit dc2535358e
4 changed files with 34 additions and 21 deletions
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20
src/rendering/twn_draw.c
View File

@ -354,25 +354,7 @@ void render(void) {
/* fit rendering context onto the resizable screen */
if (ctx.window_size_has_changed) {
if ((float)ctx.window_dims.x / (float)ctx.window_dims.y > (float)ctx.base_render_width / (float)ctx.base_render_height) {
float ratio = (float)ctx.window_dims.y / (float)ctx.base_render_height;
int w = (int)((float)ctx.base_render_width * ratio);
setup_viewport(
(int)ctx.window_dims.x / 2 - w / 2,
0,
w,
(int)ctx.window_dims.y
);
} else {
float ratio = (float)ctx.window_dims.x / (float)ctx.base_render_width;
int h = (int)((float)ctx.base_render_height * ratio);
setup_viewport(
0,
(int)ctx.window_dims.y / 2 - h / 2,
(int)ctx.window_dims.x,
h
);
}
setup_viewport((int)ctx.viewport_rect.x, (int)ctx.viewport_rect.y, (int)ctx.viewport_rect.w, (int)ctx.viewport_rect.h);
}
start_render_frame(); {

2
src/twn_engine_context_c.h
View File

@ -30,6 +30,8 @@ typedef struct EngineContext {
char *base_dir;
Vec2 window_dims;
Rect viewport_rect;
float viewport_scale;
/* configuration */
toml_table_t *config_table;

4
src/twn_input.c
View File

@ -45,8 +45,8 @@ static void update_action_pressed_state(InputState *input, Action *action) {
else {
action->just_changed = !action->is_pressed;
action->is_pressed = true;
action->position.x = (float)input->mouse_window_position.x;
action->position.y = (float)input->mouse_window_position.y;
action->position.x = ((float)input->mouse_window_position.x - ctx.viewport_rect.x) / ctx.viewport_scale;
action->position.y = ((float)input->mouse_window_position.y - ctx.viewport_rect.y) / ctx.viewport_scale;
/* TODO: */
/*

29
src/twn_loop.c
View File

@ -117,6 +117,31 @@ static void preserve_persistent_ctx_fields(void) {
}
static void update_viewport(void) {
Rect new_viewport;
float new_scale;
if ((float)ctx.window_dims.x / (float)ctx.window_dims.y > (float)ctx.base_render_width / (float)ctx.base_render_height) {
float ratio = (float)ctx.window_dims.y / (float)ctx.base_render_height;
float w = ((float)ctx.base_render_width * ratio);
new_viewport.x = ctx.window_dims.x / 2 - w / 2;
new_viewport.y = 0;
new_viewport.w = w;
new_viewport.h = ctx.window_dims.y;
new_scale = ratio;
} else {
float ratio = (float)ctx.window_dims.x / (float)ctx.base_render_width;
float h = ((float)ctx.base_render_height * ratio);
new_viewport.x = 0;
new_viewport.y = ctx.window_dims.y / 2 - h / 2;
new_viewport.w = ctx.window_dims.x;
new_viewport.h = h;
new_scale = ratio;
}
ctx.viewport_rect = new_viewport;
ctx.viewport_scale = new_scale;
}
static void main_loop(void) {
/*
if (!ctx.is_running) {
@ -204,6 +229,8 @@ static void main_loop(void) {
/* TODO: disable rendering pushes on not-last ? */
render_queue_clear();
poll_events();
if (ctx.window_size_has_changed)
update_viewport();
game_object_tick();
input_state_update(&ctx.input);
preserve_persistent_ctx_fields();
@ -773,6 +800,8 @@ int enter_loop(int argc, char **argv) {
ctx.game.debug = false;
}
update_viewport();
/* now we can actually start doing stuff */
game_object_load();