[lua tests] MaterialSystemTest update u_Time uniform (#20083)

Author: PatriceJiang

cocos/scripting/lua-bindings/manual/LuaBasicConversions.cpp

@@ -3348,7 +3348,7 @@ bool luaval_to_uniformLocation(lua_State* L, int pos, cocos2d::backend::UniformL
         return false;
 
     lua_pushstring(L, "location");
-    lua_gettable(L, pos);
+    lua_gettable(L, pos - 1);
     if (lua_isnil(L, -1)) {
         CCASSERT(false, "invalidate UniformLocation value");
     }
@@ -3362,7 +3362,7 @@ bool luaval_to_uniformLocation(lua_State* L, int pos, cocos2d::backend::UniformL
     lua_pop(L, 1);
 
     lua_pushstring(L, "shaderStage");
-    lua_gettable(L, pos);
+    lua_gettable(L, pos -1);
     if (lua_isnil(L, -1)) {
         CCASSERT(false, "invalidate UniformLocation value");
     }

tests/lua-tests/src/MaterialSystemTest/MaterialSystemTest.lua

@@ -133,6 +133,7 @@ function Material_2DEffects:subtitle()
     return "Testing effects on Sprite"
 end
 
+
 function Material_2DEffects:onEnter()
     local properties = cc.Properties:createNonRefCounted("Materials/2d_effects.material#sample")
 
@@ -161,6 +162,19 @@ function Material_2DEffects:onEnter()
     spriteEdgeDetect:setNormalizedPosition(cc.p(0.8, 0.5))
     self:addChild(spriteEdgeDetect)
     spriteEdgeDetect:setProgramState(mat1:getTechniqueByName("edge_detect"):getPassByIndex(0):getProgramState())
+
+    local scheduler = cc.Director:getInstance():getScheduler()
+    local uTimeLoc = spriteNoise:getProgramState():getUniformLocation("u_Time")
+    self._schedulerEntry = scheduler:scheduleScriptFunc(function(dt)
+        local time = cc.Director:getInstance():getTotalFrames() * cc.Director:getInstance():getAnimationInterval()
+        local random = cc.vec4(time / 10., time, time * 2, time * 4)
+        spriteNoise:getProgramState():setUniform(uTimeLoc, cc.bytearray.from_vec4(random));
+    end, 0, false)
+end
+
+function Material_2DEffects:onExit()
+    local scheduler = cc.Director:getInstance():getScheduler()
+    scheduler:unscheduleScriptEntry(self._schedulerEntry)
 end
 
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