如果要将精灵中所有形状的颜色更改为白色,则唯一的方法是使用像素着色器并将所有非黑色的片段设置为黑色(我假设黑色在您的游戏中呈现为透明) )到白色.像这样：
varying vec4 v_color;
varying vec2 v_texCoords;
uniform sampler2D u_texture;
void main() {
vec4 color=v_color * texture2D(u_texture, v_texCoords);
if(color.r!=0 && color.g!=0 && color.b!=0){
gl_FragColor=vec4(1,1,1,1);
}
else{
gl_FragColor=color;
}
}
如果您很不幸并且使用的是opengl 1.0(固定管道),我建议您现在就开始使用gles 2.0.固定管道是从90’开始的,我们现在是2013年！
编码：
初始化：
ShaderProgram.pedantic = false;
ShaderProgram defaultShader=SpriteBatch.createDefaultShader();
ShaderProgram shaderWhiteTexture=new ShaderProgram(Gdx.files.internal("vertexShader.vs").readString(),Gdx.files.internal("fragShader.fs").readString());
渲染：
//Render the textures with the normal colors
spriteBatch.begin();
spriteBatch.draw(sprite1,sprite2,sprite3...);//or whatever code u use to render them
spriteBatch.end();
//Render the textures with the shader
spriteBatch.setShader(shaderWhiteTexture);
spriteBatch.begin();
spriteBatch.draw(sprite4,sprite5,sprite6...);//or whatever code u use to render them
spriteBatch.end();
spriteBatch.setShader(defaultShader);
着色器：
//vertexShader.vs:
attribute highp vec4 a_position;
attribute highp vec4 a_color;
attribute highp vec2 a_texCoord0;
uniform mat4 u_projTrans;
varying highp vec4 v_color;
varying highp vec2 v_texCoords;
void main() {
v_color = a_color;
v_texCoords = a_texCoord0;
gl_Position = u_projTrans * a_position ;
}
//fragShader.fs:
varying highp vec4 v_color;
varying highp vec2 v_texCoords;
uniform sampler2D u_texture;
void main() {
gl_FragColor = vec4(0.0);
highp vec4 color = texture2D(u_texture, v_texCoords);
if(color.a > 0.0) {
gl_FragColor = vec4(1.0,0,0,1.0);
}
}
由问题所有者编辑：现在可以使用透明纹理
添加了什么？ ：
1 . the highp precision to variables
2 . the fragmentShader file Main() fonction edited
