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Added proper hit test with rotation and pivoting

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This commit is contained in:
Daanish
2026-05-20 20:56:25 +01:00
parent 75b1bc5dbd
commit 6ff16e3db4
7 changed files with 181 additions and 35 deletions
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src/window/window.cc
+24 -6
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@@ -155,7 +155,7 @@ Vec2<float> Window::get_text_size(uint64_t text_id) {
return text_pool[text_id]->size;
}
bool Window::write(uint64_t text_id, Vec2<float> position, float z, float angle, Vec2<float> scale, float alpha) {
bool Window::write(uint64_t text_id, Vec2<float> position, float z, float angle, Vec2<float> pivot, Vec2<float> scale, float alpha) {
if (!text_pool.is_valid(text_id)) {
fprintf(stderr, "(Write) Invalid text ID: %llu\n", (unsigned long long)text_id);
return false;
@@ -165,6 +165,7 @@ bool Window::write(uint64_t text_id, Vec2<float> position, float z, float angle,
{.type = RenderInstruction::DRAW_TEXT,
.z = z,
.angle = angle,
.pivot = pivot,
.scale = scale,
.alpha = alpha,
.draw_text = {
@@ -176,7 +177,7 @@ bool Window::write(uint64_t text_id, Vec2<float> position, float z, float angle,
return true;
};
bool Window::draw(uint64_t image_id, Vec2<float> position, float z, float angle, Vec2<float> scale, float alpha) {
bool Window::draw(uint64_t image_id, Vec2<float> position, float z, float angle, Vec2<float> pivot, Vec2<float> scale, float alpha) {
if (!image_pool.is_valid(image_id)) {
fprintf(stderr, "Invalid image ID: %llu\n", (unsigned long long)image_id);
return false;
@@ -186,6 +187,7 @@ bool Window::draw(uint64_t image_id, Vec2<float> position, float z, float angle,
{.type = RenderInstruction::DRAW_IMAGE,
.z = z,
.angle = angle,
.pivot = pivot,
.scale = scale,
.alpha = alpha,
.draw_image = {
@@ -197,11 +199,12 @@ bool Window::draw(uint64_t image_id, Vec2<float> position, float z, float angle,
return true;
};
bool Window::draw_rect(Rect rect, Color color, float z, float angle, Vec2<float> scale, float alpha) {
bool Window::draw_rect(Rect rect, Color color, float z, float angle, Vec2<float> pivot, Vec2<float> scale, float alpha) {
render_instructions.push_back(
{.type = RenderInstruction::DRAW_RECT,
.z = z,
.angle = angle,
.pivot = pivot,
.scale = scale,
.alpha = alpha,
.draw_rect = {
@@ -279,13 +282,18 @@ void Window::render() {
SDL_SetTextureAlphaModFloat(texture, instruction.alpha);
SDL_FPoint pivot_point = {
instruction.pivot.x * scale_x,
instruction.pivot.y * scale_y
};
SDL_RenderTextureRotated(
renderer,
texture,
nullptr,
&dst_rect,
instruction.angle,
nullptr,
&pivot_point,
flip
);
} break;
@@ -311,13 +319,18 @@ void Window::render() {
SDL_SetTextureAlphaModFloat(image->texture, instruction.alpha);
SDL_FPoint pivot_point = {
instruction.pivot.x * scale_x,
instruction.pivot.y * scale_y
};
SDL_RenderTextureRotated(
renderer,
image->texture,
nullptr,
&dst_rect,
instruction.angle,
nullptr,
&pivot_point,
flip
);
} break;
@@ -338,13 +351,18 @@ void Window::render() {
SDL_SetTextureAlphaModFloat(white_tex, instruction.alpha);
SDL_FPoint pivot_point = {
instruction.pivot.x * dst_rect.w,
instruction.pivot.y * dst_rect.h
};
SDL_RenderTextureRotated(
renderer,
white_tex,
nullptr,
&dst_rect,
instruction.angle,
nullptr,
&pivot_point,
SDL_FLIP_NONE
);
} break;