#version 450

layout(location = 0) in vec3 inPosition;
layout(location = 1) in vec3 inColor;

layout(location = 0) out vec3 fragColor;
layout(location = 1) out float fragLinePosition; // 用于虚线计算

layout(binding = 0) uniform UniformBufferObject {
    mat4 proj;
    mat4 model;
    mat4 view;
} ubo;

void main() {
    mat4 mvp = ubo.proj * ubo.view * ubo.model;
    gl_Position = mvp * vec4(inPosition, 1.0);
    fragColor = inColor;
    gl_PointSize = 2.0;
    
    // 硬编码虚线参数：使用模型空间的X坐标，你可以根据需要调整
    fragLinePosition = inPosition.x;
}