69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
#include "raylib.h"
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#include <cmath>
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void handleRightClick(Camera3D camera, Vector3* target_position) {
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Ray ray = GetMouseRay(GetMousePosition(), camera);
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if (ray.direction.y > 0)
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return;
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// Calculate t (distance along ray to ground plane at y=0)
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float t = 0 - ray.position.y / ray.direction.y;
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// Calculate where ray hits the ground
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target_position->x = ray.position.x + (ray.direction.x * t);
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target_position->z = ray.position.z + (ray.direction.z * t);
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}
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int main() {
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InitWindow(900, 600, "My First 3D Cube");
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Camera3D camera = {0};
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camera.position = (Vector3){10.0f, 10.0f, 10.0f};
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camera.target = (Vector3){0.0f, 0.0f, 0.0f};
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camera.up = (Vector3){0.0f, 2.0f, 0.0f};
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camera.fovy = 90.0f;
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camera.projection = CAMERA_PERSPECTIVE;
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Vector3 cube_position = {0, 1.0, 0};
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Vector3 target_position = {0, 0, 0};
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float move_speed = 0.001f;
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while (!WindowShouldClose()) {
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if (IsMouseButtonPressed(MOUSE_BUTTON_RIGHT)) {
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handleRightClick(camera, &target_position);
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}
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// Movement to target
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if(cube_position.x != target_position.x || cube_position.z != target_position.z) {
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float xdiff = target_position.x - cube_position.x;
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float zdiff = target_position.z - cube_position.z;
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float distance = sqrtf(pow(xdiff, 2) + pow(zdiff, 2));
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// snap to target
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if (distance < move_speed) {
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cube_position.x = target_position.x;
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cube_position.z = target_position.z;
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continue;
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}
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cube_position.x += (xdiff/distance) * move_speed;
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cube_position.z += (zdiff/distance) * move_speed;
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}
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BeginDrawing();
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ClearBackground((Color){0, 0, 0, 0});
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BeginMode3D(camera);
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DrawPlane((Vector3){0, 0, 0}, (Vector2) {500, 500}, BLUE);
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DrawCube(cube_position, 2.0f, 2.0f, 2.0f, RED);
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//DrawGrid(100, 1.0f);
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EndMode3D();
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EndDrawing();
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}
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CloseWindow();
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return 0;
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}
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