尝试组合过滤器/效果时 Corona SDK 崩溃

Question

我正在尝试通过结合现有效果和 Corona Simulator 崩溃来创建新效果。

这是我的代码

graphics.defineEffect({
    language = "glsl",
    category = "filter",
    name = "myEffect",
    graph = {
        gray = { effect = "filter.grayscale", input1 = "paint1" },
        --final = { effect = "filter.contrast", input1 = "gray" },
    },
    output = "gray"
});

local rect = display.newRect(100, 100, 100, 100);
rect:setFillColor(1, 0, 0);
rect.fill.effect = "filter.myEffect";

还有关于过滤器参数的问题。如何在此示例中指定过滤器对比度的参数？

谢谢

Answer 1

这最近也给我带来了麻烦。我发现它可以通过在节点表中声明效果的图形定义来解决。

我在下面包含了解决方案和更正的语法。

graphics.defineEffect({
    language = "glsl",
    category = "filter",
    name = "myEffect",
    graph = {
      nodes = {
         gray = { effect = "filter.grayscale", input1 = "paint1" }
         --final = { effect = "filter.contrast", input1 = "gray" },
      },
       output = "gray"
    }
})

local rect = display.newRect(100, 100, 100, 100);
rect:setFillColor(1, 0, 0);
rect.fill.effect = "filter.myEffect";

关于对比问题，如果我误解了，请原谅，但这应该是一个可行的解决方案

graphics.defineEffect({
    language = "glsl",
    category = "filter",
    name = "myEffect",
    graph = {
      nodes = {
         gray = { effect = "filter.grayscale", input1 = "paint1" },
         final = { effect = "filter.contrast", input1 = "gray" }
      },
       output = "final"
    }
})

local rect = display.newRect(100, 100, 100, 100);
rect:setFillColor(1, 0, 0);
rect.fill.effect = "filter.myEffect";
rect.fill.effect.final.contrast = 2

一个很好的介绍是Tutorial: Multi-Pass Shaders in Graphics 2.0 by Bryan Smith