Sine is a function of an angle and represents a ratio between the sides of a right triangle (e.g. using clamp to specify a min/max view angle on a security camera). an example is given where the heightmap of a texture is used to blend between two textures where a grass texture blends into a cobblestone texture).Ĭlamp is used to clamp the input value to the specified Min and Max Range (e.g. HeightLerp is a Lerp that modulates the blend using a heightmap (e.g. an example of using Lerp to blend between two textures is given). When the alpha is 1, 100% of B is returned (e.g. In the given example, when the alpha is 0, 100% of A will be returned. Linear Interpolation (Lerp) returns a blend between the A and B inputs based on the alpha input.
an example is given to adjust the contrast of a texture). Negative values become positive just like ABS and a power of 1 will give the same result as ABS (e.g. Power takes a base input and applies an exponent. an example is provided for generating a stripe pattern on a material). It divides A by B and returns the remainder (e.g. An example of creating a Mosaic is also provided).įMod stands for Floating Modulus and has both A and B inputs. The result of ceil is always 1 greater than floor (e.g. where 0.9 becomes 0 or 1.9 becomes 1, etc.).Ĭeil works just like floor but rounds up instead of down. the value of Raw Time is shown counting upwards extending past 1, Frac is used to express the 0 to 1 time that increments the Raw Time value).įloor removes the fraction from any number keeping only the integer (e.g. Using the Frac function to remove the integer part of any number which is useful for pseudo random number generation (e.g. By taking the Sine of Time and getting the ABS value, a bouncing motion is created for a ball).
Obtaining the Absolute (ABS value of X where negative values are read as positive values (e.g.
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Listed below are the examples provided in the Functions section, example use cases can be found along the right side of the wall.ĭescribes how to read each chart in this section where each chart plots the value of X for various math functions. making objects face the player, checking if players are looking towards something or finding out how far the player is from an object). The second section covers Vector Math and describes the various types of Vectors and how they are used in Materials as well as their importance as it relates to Blueprints (e.g. This section is excellent for learning more about blending Materials as well as how logic can be applied to Materials to create events like rippling water or bouncing balls entirely inside the Material Editor. The first section entitled Functions, covers Math and Material Functions (left side of the wall) and example usage cases (right side of the wall). The Math_Hall map inside the Content Examples project aims to give you more of an understanding of how math is used within Unreal Engine 4 inside of Blueprints and Materials.
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