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constraints for text. added rotation constraint and rotate around center of elements

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Illusion
2023-12-11 23:00:31 +02:00
committed by Illusion
parent e44f7fb078
commit 9ff6a1f9dc
6 changed files with 105 additions and 60 deletions
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helper.c
+24 -8
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@@ -28,17 +28,33 @@ void mult_4x4(Matrix4x4 *multiplicant, Matrix4x4 *multiplier) {
*multiplicant = result;
}
// TODO: rotate around the center of the element
// currently we rotate around the 0, 0 point of the element
void apply_scale(Matrix4x4 *matrix, Sizef scale) {
Matrix4x4 temp = identity();
temp.m[0][0] = scale.width;
temp.m[1][1] = scale.height;
mult_4x4(matrix, &temp);
}
void apply_rotation(Matrix4x4 *model, float angle) {
Matrix4x4 ident = identity();
Matrix4x4 temp = identity();
ident.m[0][0] = cos(angle);
ident.m[0][1] = sin(angle);
ident.m[1][0] = -sin(angle);
ident.m[1][1] = cos(angle);
temp.m[0][0] = cos(angle);
temp.m[0][1] = sin(angle);
temp.m[1][0] = -sin(angle);
temp.m[1][1] = cos(angle);
mult_4x4(model, &ident);
mult_4x4(model, &temp);
}
void apply_translation(Matrix4x4 *matrix, Vec2f pos) {
Matrix4x4 temp = identity();
temp.m[3][0] = pos.x;
temp.m[3][1] = pos.y;
mult_4x4(matrix, &temp);
}
Matrix4x4 orthographic_projection_2d(float left, float right, float bottom, float top) {