2025-06-11 05:43:36 +00:00
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shader_type canvas_item;
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uniform float bulge_position : hint_range(0.0, 1.0) = 0.3;
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uniform float bulge_height : hint_range(0.0, 1.0) = 0.2;
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uniform float bulge_width : hint_range(0.01, 0.5) = 0.1;
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uniform bool debug_mode = false;
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void vertex() {
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// 获取当前顶点在纹理中的水平位置（0-1范围）
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float x_pos = UV.x;
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2025-06-14 08:46:32 +00:00
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2025-06-11 05:43:36 +00:00
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// 计算距离隆起中心点的距离
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float distance_from_center = abs(x_pos - bulge_position);
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2025-06-14 08:46:32 +00:00
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2025-06-11 05:43:36 +00:00
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// 使用 smoothstep 创建从中心到边缘的平滑过渡
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// 当 distance_from_center = 0 时，返回 1.0
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// 当 distance_from_center >= bulge_width 时，返回 0.0
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float bulge_factor = 1.0 - smoothstep(0.0, bulge_width, distance_from_center);
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2025-06-14 08:46:32 +00:00
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2025-06-11 05:43:36 +00:00
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// 应用更自然的隆起曲线（抛物线型）
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//bulge_factor = pow(bulge_factor, 2.0);
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2025-06-14 08:46:32 +00:00
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2025-06-11 05:43:36 +00:00
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// 修改顶点位置，向上移动
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VERTEX.y -= bulge_factor * bulge_height * 100.0; // 乘以100.0调整隆起幅度
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}
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//void fragment() {
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//if (debug_mode) {
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//// 调试模式：显示 UV.x 的值作为颜色
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//COLOR = vec4(UV.x, 0.0, 0.0, 1.0);
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//} else {
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//float x_pos = UV.x;
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//float distance_from_center = abs(x_pos - bulge_position);
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//float bulge_factor = 1.0 - smoothstep(0.0, bulge_width, distance_from_center);
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//
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//// 在隆起区域显示不同颜色来验证计算
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//vec4 original_color = texture(TEXTURE, UV);
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//if (bulge_factor > 0.1) {
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//COLOR = mix(original_color, vec4(1.0, 0.0, 0.0, 1.0), 0.3);
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//} else {
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//COLOR = original_color;
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//}
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//}
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//}
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