LOVE/love
1
0
Fork 0
mirror of https://github.com/love2d/love.git synced 2026-08-19 20:19:42 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add low-level hardware instancing support to Meshes.

Browse Source 
Add “instancing” Graphics Feature constant.

Add love.graphics.drawInstanced(mesh, instancecount, x, y, …) which draws the mesh multiple times in a single draw call. Each instance of the mesh will appear in the exact same spot unless one of the following are used:

- Add an optional vertex attribute step type argument to Mesh:attachAttribute. “pervertex” is the default. “perinstance” causes the attribute to be per-instance instead of per-vertex, when the mesh is drawn.

- Add love_InstanceID as a built-in read only int variable in GLSL 3 vertex shaders. It is always 0 except when a Mesh is drawn with more than 1 instance specified in the draw call. It can be used to manually compute or index into per-instance values in a shader.

--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2017-01-22 20:52:11 -04:00
parent 731b5d5cf0
commit bea7cfdaab
11 changed files with 162 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/modules/graphics/opengl/OpenGL.h
+5 -3
View File
@@ -212,8 +212,8 @@ public:
* glDrawArrays and glDrawElements which increment the draw-call counter by
* themselves.
**/
void drawArrays(GLenum mode, GLint first, GLsizei count);
void drawElements(GLenum mode, GLsizei count, GLenum type, const void *indices);
void drawArrays(GLenum mode, GLint first, GLsizei count, GLsizei instancecount = 1);
void drawElements(GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei instancecount = 1);
/**
* Sets the enabled vertex attribute arrays based on the specified attribute
@@ -222,7 +222,7 @@ public:
* See the VertexAttribFlags enum for the standard vertex attributes.
* This function *must* be used instead of glEnable/DisableVertexAttribArray.
**/
void useVertexAttribArrays(uint32 arraybits);
void useVertexAttribArrays(uint32 arraybits, uint32 instancedbits = 0);
/**
* Sets the OpenGL rendering viewport to the specified rectangle.
@@ -315,6 +315,7 @@ public:
bool isClampZeroTextureWrapSupported() const;
bool isPixelShaderHighpSupported() const;
bool isInstancingSupported() const;
/**
* Returns the maximum supported width or height of a texture.
@@ -410,6 +411,7 @@ private:
int curTextureUnit;
uint32 enabledAttribArrays;
uint32 instancedAttribArrays;
Colorf constantColor;
Colorf lastConstantColor;