69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
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#include <raymath.h>
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#include <cstdio>
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int main(int argc, char const *argv[])
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{
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std::printf("\n\n\n");
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Vector2 mousePosition = {.x = 15, .y = 10};
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Vector2 mouseStart;
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Vector2 orgPosition = {.x = 0, .y = 10};
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float screenWidth = 30;
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mouseStart = mousePosition;
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std::printf("MouseStart x:%f, y:%f\n", mouseStart.x, mouseStart.y);
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std::printf("orgPosition x:%f, y:%f\n", orgPosition.x, orgPosition.y);
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// distance betwen corner of image and mouse startPoint
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float len = Vector2Distance(mouseStart, orgPosition);
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std::printf("len %f\n", len);
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// angle in rad betwen mouse and image corner
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float atan2x = orgPosition.x - mouseStart.x;
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float atan2y = orgPosition.y - mouseStart.y;
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std::printf("atan2 x:%f, y:%f\n", atan2x, atan2y);
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float angleOfset = std::atan2( orgPosition.y - mouseStart.y, orgPosition.x - mouseStart.x);
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std::printf("angleOffset %f\n", angleOfset);
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mousePosition = {.x = 20, .y = 10};
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// get distance that mouse has moved from original press location
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// can be positive or negative if mouse start on right side and
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// end on left it will be 0 - 100 so -100 dist
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float dist = mousePosition.x - mouseStart.x;
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printf("dist: %f\n", dist);
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// this value can get from -1 to 1 based on if we swipe left or right
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float l = dist / screenWidth;
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printf("l: %f\n", l);
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// first convert range of -1 to 1 to 0 to 1
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// then change to degres from 45 to -45
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float rotation = Lerp(45.0f, -45.0f, (l + 1) / 2);
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printf("rotation: %f\n", rotation);
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// convert to radians
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float angle = ((rotation)*PI) / 180.0f;
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printf("angle: %f\n", angle);
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angle += angleOfset;
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printf("angle + angleOfser: %f\n", angle);
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// vector betwen image corrner and mouse
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Vector2 newCornerVec = {.x = len * std::cos(angle), .y = len * std::sin(angle)};
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printf("newCornerVec x: %f, y:%f \n", newCornerVec.x, newCornerVec.y);
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// get global vector where to draw image
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Vector2 newPosition;
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newPosition.x = newCornerVec.x + mousePosition.x;
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newPosition.y = newCornerVec.y + mousePosition.y;
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printf("New position x: %f, y:%f \n", newPosition.x, newPosition.y);
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printf("Draw image at this angle %f\n", rotation + 90);
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return 0;
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}
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