Need Help Curving platforms

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1

Godot Version

4.3

Question

Trying to curve platforms and the shader code Im using is not working. Can someone explain to me why and/or give me steps on how to fix it.

shader_type canvas_item;
uniform float curve_strength : hint_range(0.0, 1.0);

void fragment() {
    vec2 uv = FRAGCOORD.xy / SCREEN_PIXEL_SIZE; // Normalize coordinates
    vec2 center = vec2(0.5, 0.5); // Center of the texture

    // Calculate the distance from the center
    float dist = distance(uv, center);

    // Apply the curvature effect
    if (dist < 0.5) {
        float angle = acos(dist); // Get the angle
        float curve = sin(angle * 2.0) * curve_strength; // Curve effect
        uv.y += curve; // Adjust the UV based on the curve
    }

    // Set the final color
    COLOR = texture(TEXTURE, uv);
}
2

in what way is it not working. is it having an effect, but the wrong one? or is nothing happening?

3

nothing is happening

4

can you make something happen by just doing COLOR = vec4(1.0,0.0,1.0,1.0); like are you sure the shader is even applied to your canvas

5

Screen Shot 2024-10-14 at 3.00.09 PM
Screen Shot 2024-10-14 at 3.00.09 PM582×1039 40.8 KB

I have it applied to the canvasitem and nothing still works

6

is that magenta color from the shader?

7

yes from the COLOR = vec4(1.0,0.0,1.0,1.0); line

8

okay so it looks like the shader is working in the material preview, are you actually putting this material onto anything though? like a canvas rectangle for example

9

Screen Shot 2024-10-15 at 6.05.27 PM
Screen Shot 2024-10-15 at 6.05.27 PM1920×860 103 KB

I have it attached to the meshinstace of a staticbody2d

10

this shader you’ve posted above is a postprocessing shader, it needs to put put onto a canvas texture. or maybe what you really want here is a vertex shader if you just want to add curvature to this one platform

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