61 lines
2 KiB
C++
61 lines
2 KiB
C++
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#include "surface_triangle.h"
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// third party includes
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#include <raylib.h>
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#include <raymath.h>
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// local includes
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#include "3d_helpers.h"
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#include "ems.h"
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SurfaceTriangle::SurfaceTriangle()
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: triangle_coords{Vector3{0.5F, 0.0F, -0.5F}, Vector3{-0.5F, 0.0F, -0.5F},
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Vector3{-0.5F, 0.0F, 0.5F}},
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triangle_pos{0.0F, 0.0F, 0.0F},
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rotate_axis{0.0F, 1.0F, 0.0F},
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pos_move_dir{0.0F, 1.0F, 0.0F},
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rotation(0.0F),
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move_amount(0.0F) {}
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SurfaceTriangle::SurfaceTriangle(Vector3 a, Vector3 b, Vector3 c, Vector3 pos)
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: triangle_coords{a, b, c},
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triangle_pos{pos},
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rotate_axis{call_js_get_random() * 2.0F - 1.0F,
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call_js_get_random() * 2.0F - 1.0F,
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call_js_get_random() * 2.0F - 1.0F},
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pos_move_dir{call_js_get_random() * 2.0F - 1.0F,
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call_js_get_random() * 2.0F - 1.0F,
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call_js_get_random() * 2.0F - 1.0F},
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rotation(0.0F),
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move_amount(0.0F) {
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if (FloatEquals(rotate_axis.x, 0.0F) && FloatEquals(rotate_axis.x, 0.0F) &&
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FloatEquals(rotate_axis.x, 0.0F)) {
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rotate_axis.x = 1.0F;
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}
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if (FloatEquals(pos_move_dir.x, 0.0F) && FloatEquals(pos_move_dir.x, 0.0F) &&
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FloatEquals(pos_move_dir.x, 0.0F)) {
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pos_move_dir.x = 1.0F;
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}
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rotate_axis = Vector3Normalize(rotate_axis);
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pos_move_dir = Vector3Normalize(pos_move_dir);
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}
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void SurfaceTriangle::update(float dt) {
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rotation += dt * SURFACE_TRIANGLE_ROTATION_RATE;
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move_amount += dt * SURFACE_TRIANGLE_MOVE_RATE;
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}
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void SurfaceTriangle::draw(Color color) {
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const auto mat =
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MatrixRotate(rotate_axis, rotation) *
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MatrixTranslate(triangle_pos.x + pos_move_dir.x * move_amount,
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triangle_pos.y + pos_move_dir.y * move_amount,
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triangle_pos.z + pos_move_dir.z * move_amount);
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Vector3 a = mat * triangle_coords[0];
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Vector3 b = mat * triangle_coords[1];
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Vector3 c = mat * triangle_coords[2];
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DrawTriangle3D(a, b, c, color);
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}
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