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Add (low level) functionality to allow rendering 3D Meshes.

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- Add love.graphics.setDepthMode(testcomparison, enablewrites).
- Add love.graphics.setMeshCullMode.
- Add love.graphics.setFrontFaceWinding.

Depth testing and depth writes require a depth buffer to work. The mesh cull mode controls whether front/back faces of a mesh are culled. The front face winding determines whether a clockwise or counterclockwise-oriented face in a mesh is considered front facing.

--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2017-12-09 23:34:08 -04:00
parent 915e6c8eec
commit 7354de2059
21 changed files with 572 additions and 113 deletions
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src/modules/graphics/opengl/OpenGL.h
+30 -6
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@@ -92,6 +92,16 @@ public:
FRAMEBUFFER_ALL = (FRAMEBUFFER_READ | FRAMEBUFFER_DRAW),
};
enum EnableState
{
ENABLE_DEPTH_TEST,
ENABLE_STENCIL_TEST,
ENABLE_SCISSOR_TEST,
ENABLE_FACE_CULL,
ENABLE_FRAMEBUFFER_SRGB,
ENABLE_MAX_ENUM
};
struct TextureFormat
{
GLenum internalformat = 0;
@@ -204,6 +214,11 @@ public:
**/
void setVertexAttributes(const vertex::Attributes &attributes, const vertex::Buffers &buffers);
/**
* Wrapper for glCullFace which eliminates redundant state setting.
**/
void setCullMode(CullMode mode);
/**
* Wrapper for glClearDepth and glClearDepthf.
**/
@@ -236,10 +251,10 @@ public:
float getPointSize() const;
/**
* Calls glEnable/glDisable(GL_FRAMEBUFFER_SRGB).
* State-tracked version of glEnable.
**/
void setFramebufferSRGB(bool enable);
bool hasFramebufferSRGB() const;
void setEnableState(EnableState state, bool enable);
bool isStateEnabled(EnableState state) const;
/**
* Binds a Framebuffer Object to the specified target.
@@ -250,6 +265,12 @@ public:
void framebufferTexture(GLenum attachment, TextureType texType, GLuint texture, int level, int layer = 0, int face = 0);
/**
* Calls glDepthMask.
**/
void setDepthWrites(bool enable);
bool hasDepthWrites() const;
/**
* Calls glUseProgram.
**/
@@ -415,7 +436,10 @@ private:
// Texture unit state (currently bound texture for each texture unit.)
std::vector<GLuint> boundTextures[TEXTURE_MAX_ENUM];
// Currently active texture unit.
bool enableState[ENABLE_MAX_ENUM];
GLenum faceCullMode;
int curTextureUnit;
uint32 enabledAttribArrays;
@@ -429,9 +453,9 @@ private:
float pointSize;
GLuint boundFramebuffers[2];
bool depthWritesEnabled;
bool framebufferSRGBEnabled;
GLuint boundFramebuffers[2];
GLuint defaultTexture[TEXTURE_MAX_ENUM];