Added origin buffer to improve cover height shading

[tar-legacy.git] / MCDV / GBuffer.hpp

diff --git a/MCDV/GBuffer.hpp b/MCDV/GBuffer.hpp
index 6c17d66002eeea151fd1dcdd90b872de01a5ebf5..d33dbf5aa90f21175024d2839d955e5e7ed523fc 100644 (file)
--- a/MCDV/GBuffer.hpp
+++ b/MCDV/GBuffer.hpp
@@ -12,6 +12,7 @@ class GBuffer {
        unsigned int gPosition;
        unsigned int gNormal;
        unsigned int gMapInfo;
+       unsigned int gOrigin;
 
        unsigned int gMask;
 
@@ -52,14 +53,23 @@ public:
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
                glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, this->gMapInfo, 0);
 
+               // Brush/model origin whatever
+               glGenTextures(1, &this->gOrigin);
+               glBindTexture(GL_TEXTURE_2D, this->gOrigin);
+               glTexImage2D(GL_TEXTURE_2D, 0, GL_RG16F, window_width, window_height, 0, GL_RG, GL_FLOAT, NULL);
+               glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+               glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+               glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, this->gOrigin, 0);
+
                // Announce attachments
-               unsigned int attachments[3] = { 
+               unsigned int attachments[4] = { 
                        GL_COLOR_ATTACHMENT0, 
                        GL_COLOR_ATTACHMENT1, 
-                       GL_COLOR_ATTACHMENT2
+                       GL_COLOR_ATTACHMENT2,
+                       GL_COLOR_ATTACHMENT3
                };
 
-               glDrawBuffers(3, attachments);
+               glDrawBuffers(4, attachments);
 
                // Create and test render buffer
                glGenRenderbuffers(1, &this->rBuffer);
@@ -98,6 +108,12 @@ public:
                glActiveTexture(GL_TEXTURE0);
        }
 
+       void BindOriginBufferToTexSlot(int slot = 0) {
+               glActiveTexture(GL_TEXTURE0 + slot);
+               glBindTexture(GL_TEXTURE_2D, this->gOrigin);
+               glActiveTexture(GL_TEXTURE0);
+       }
+
        void Bind() {
                glViewport(0, 0, this->width, this->height);
                glBindFramebuffer(GL_FRAMEBUFFER, this->gBuffer ); //Set as active draw target
@@ -187,6 +203,8 @@ class FBuffer {
        unsigned int rBuffer;
 
        unsigned int gColor;
+       unsigned int hData;
+       unsigned int aoBuffer;
 
        int width;
        int height;
@@ -200,7 +218,7 @@ public:
                glGenFramebuffers(1, &this->gBuffer);
                glBindFramebuffer(GL_FRAMEBUFFER, this->gBuffer);
 
-               // Position buffer float16 (48bpp)
+               // Color buffer
                glGenTextures(1, &this->gColor);
                glBindTexture(GL_TEXTURE_2D, this->gColor);
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, window_width, window_height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
@@ -208,12 +226,30 @@ public:
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, this->gColor, 0);
 
+               // Position buffer float16
+               glGenTextures(1, &this->hData);
+               glBindTexture(GL_TEXTURE_2D, this->hData);
+               glTexImage2D(GL_TEXTURE_2D, 0, GL_R16F, window_width, window_height, 0, GL_RED, GL_FLOAT, NULL);
+               glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+               glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+               glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, this->hData, 0);
+
+               // Position buffer float16
+               glGenTextures(1, &this->aoBuffer);
+               glBindTexture(GL_TEXTURE_2D, this->aoBuffer);
+               glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, window_width, window_height, 0, GL_RED, GL_UNSIGNED_BYTE, NULL);
+               glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+               glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+               glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, this->aoBuffer, 0);
+
                // Announce attachments
-               unsigned int attachments[1] = {
-                       GL_COLOR_ATTACHMENT0
+               unsigned int attachments[3] = {
+                       GL_COLOR_ATTACHMENT0,
+                       GL_COLOR_ATTACHMENT1,
+                       GL_COLOR_ATTACHMENT2
                };
 
-               glDrawBuffers(1, attachments);
+               glDrawBuffers(3, attachments);
 
                // Create and test render buffer
                glGenRenderbuffers(1, &this->rBuffer);
@@ -240,6 +276,12 @@ public:
                glActiveTexture(GL_TEXTURE0);
        }
 
+       void BindHeightToTexSlot(int slot = 0) {
+               glActiveTexture(GL_TEXTURE0 + slot);
+               glBindTexture(GL_TEXTURE_2D, this->hData);
+               glActiveTexture(GL_TEXTURE0);
+       }
+
        void Bind() {
                glViewport(0, 0, this->width, this->height);
                glBindFramebuffer(GL_FRAMEBUFFER, this->gBuffer); //Set as active draw target