着色器編譯錯誤

Question

我正在開發一個在源代碼中隱藏了着色器的項目。 我收到此錯誤（在運行時）：

Error compiling vertex shader:

Full VS shader source:

//precision highp float;

uniform vec2 uEyeToSourceUVScale;
uniform vec2 uEyeToSourceUVOffset;

attribute vec4 aPosition;         ///< [-1,+1],[-1,+1] over the entire framebuffer. Lerp factor in Pos.z. Vignette fade factorin Pos.w.
attribute vec2 aTanEyeAnglesR;   ///< The tangents of the horizontal and vertical eye angles for the red channel.
attribute vec2 aTanEyeAnglesG;   ///< The tangents of the horizontal and vertical eye angles for the green channel.
attribute vec2 aTanEyeAnglesB;   ///< The tangents of the horizontal and vertical eye angles for the blue channel.

varying vec4 vPosition; 
varying vec2 vTexCoordR; 
varying vec2 vTexCoordG; 
varying vec2 vTexCoordB; 

void main(void)
{
    vPosition = aPosition;
    vTexCoordR = aTanEyeAnglesR * uEyeToSourceUVScale + uEyeToSourceUVOffset;
    vTexCoordG = aTanEyeAnglesG * uEyeToSourceUVScale + uEyeToSourceUVOffset;
    vTexCoordB = aTanEyeAnglesB * uEyeToSourceUVScale + uEyeToSourceUVOffset;
    vTexCoordR.y = 1.0 - vTexCoordR.y;
    vTexCoordG.y = 1.0 - vTexCoordG.y;
    vTexCoordB.y = 1.0 - vTexCoordB.y;
    gl_Position = vec4(aPosition.xy, 0, 1);
}

Shader compilation failed.

我不知道如何解決這個問題（沒有着色器經驗）； 但是，我知道着色器代碼類似於 C++ 代碼，從這個意義上說，這對我來說看起來非常正確（除非我遺漏了一些東西）。

這個着色器代碼有什么明顯的問題嗎？

Answer 1

缺少#version指令意味着#version 110 。

gl_Position = vec4(aPosition.xy, 0, 1);
                                 ^  ^ int literals

#version 110不支持自動int -> float轉換。 改用float文字：

gl_Position = vec4(aPosition.xy, 0.0, 1.0);
                                 ^^^  ^^^ float literals