OpenGLEnumMapper Namespace

Definition

namespace helios::ext::opengl::rendering::OpenGLEnumMapper { ... }

Functions Index

GLenum	toOpenGL (helios::rendering::mesh::PrimitiveType primitiveType) noexcept
	Translates a helios abstract PrimitiveType enum to its corresponding OpenGL GLenum value. More...

Functions

toOpenGL()

GLenum helios::ext::opengl::rendering::OpenGLEnumMapper::toOpenGL (helios::rendering::mesh::PrimitiveType primitiveType)

nodiscard noexcept

Translates a helios abstract PrimitiveType enum to its corresponding OpenGL GLenum value.

This utility function maps API-agnostic primitive types defined by helios to their OpenGL equivalents. It is used internally by OpenGLMeshRenderer and other OpenGL rendering components.

Supported mappings:

• `PrimitiveType::Points` → `GL_POINTS`
• `PrimitiveType::Lines` → `GL_LINES`
• `PrimitiveType::LineLoop` → `GL_LINE_LOOP`
• `PrimitiveType::LineStrip` → `GL_LINE_STRIP`
• `PrimitiveType::Triangles` → `GL_TRIANGLES`
• `PrimitiveType::TriangleStrip` → `GL_TRIANGLE_STRIP`
• `PrimitiveType::TriangleFan` → `GL_TRIANGLE_FAN`

Example usage: ```cpp auto glPrimitive = OpenGLEnumMapper::toOpenGL(PrimitiveType::Triangles); glDrawElements(glPrimitive, indexCount, GL_UNSIGNED_INT, nullptr); ```

Parameters

primitiveType

The API-agnostic PrimitiveType value.

Returns

The corresponding OpenGL primitive type as a GLenum. Falls back to `GL_TRIANGLES` if the mapping is not explicitly defined.

info

This function is marked `[[nodiscard]]` to encourage proper usage of the return value.

Definition at line 41 of file OpenGLEnums.ixx.

41 [[nodiscard]] GLenum toOpenGL(helios::rendering::mesh::PrimitiveType primitiveType) noexcept {

42 switch (primitiveType) {

43 case helios::rendering::mesh::PrimitiveType::Points:

44 return GL_POINTS;

45 case helios::rendering::mesh::PrimitiveType::Lines:

46 return GL_LINES;

47 case helios::rendering::mesh::PrimitiveType::LineLoop:

48 return GL_LINE_LOOP;

49 case helios::rendering::mesh::PrimitiveType::LineStrip:

50 return GL_LINE_STRIP;

51 case helios::rendering::mesh::PrimitiveType::Triangles:

52 return GL_TRIANGLES;

53 case helios::rendering::mesh::PrimitiveType::TriangleStrip:

54 return GL_TRIANGLE_STRIP;

55 case helios::rendering::mesh::PrimitiveType::TriangleFan:

56 return GL_TRIANGLE_FAN;

57 default:

58 return GL_TRIANGLES;

59 }

60 }

References helios::rendering::mesh::LineLoop, helios::rendering::mesh::Lines, helios::rendering::mesh::LineStrip, helios::rendering::mesh::Points, helios::rendering::mesh::TriangleFan, helios::rendering::mesh::Triangles and helios::rendering::mesh::TriangleStrip.

Referenced by helios::ext::opengl::rendering::OpenGLMeshRenderer::render.

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The documentation for this namespace was generated from the following file:

• OpenGLEnums.ixx

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