From d781d5a3c1ec6872361db2a15786dfc0db9780f3 Mon Sep 17 00:00:00 2001
From: Matthew Kosarek <mattkae@protonmail.com>
Date: Tue, 5 Oct 2021 06:35:09 -0400
Subject: Working tree render, now just have to do the leaves

---
 themes/LeafParticleRender.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 themes/LeafParticleRender.cpp

(limited to 'themes/LeafParticleRender.cpp')

diff --git a/themes/LeafParticleRender.cpp b/themes/LeafParticleRender.cpp
new file mode 100644
index 0000000..e119e22
--- /dev/null
+++ b/themes/LeafParticleRender.cpp
@@ -0,0 +1,51 @@
+#include "LeafParticleRender.h"
+#include "Renderer2d.h"
+
+void LeafParticleRender::load(Renderer2d *renderer, TreeShape *tree) {
+    numVertices = 0;
+    numLeaves = 0;
+
+    vertices = new Renderer2dVertex[numVertices];
+
+    useShader(renderer->shader);
+
+    glGenVertexArrays(1, &vao);
+    glBindVertexArray(vao);
+
+    glGenBuffers(1, &vbo);
+    glBindBuffer(GL_ARRAY_BUFFER, vbo);
+    glBufferData(GL_ARRAY_BUFFER, numVertices * sizeof(Renderer2dVertex), &vertices[0], GL_DYNAMIC_DRAW);
+
+    glEnableVertexAttribArray(renderer->attributes.position);
+    glVertexAttribPointer(renderer->attributes.position, 2, GL_FLOAT, GL_FALSE, sizeof(Renderer2dVertex), (GLvoid *)0);
+
+    glEnableVertexAttribArray(renderer->attributes.color);
+    glVertexAttribPointer(renderer->attributes.color, 4, GL_FLOAT, GL_FALSE, sizeof(Renderer2dVertex), (GLvoid *)offsetof(Renderer2dVertex, color));
+
+    glEnableVertexAttribArray(renderer->attributes.scale);
+    glVertexAttribPointer(renderer->attributes.scale, 2, GL_FLOAT, GL_FALSE, sizeof(Renderer2dVertex), (GLvoid *)offsetof(Renderer2dVertex, scale));
+
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindVertexArray(0);
+}
+
+void LeafParticleRender::update(float32 dtSeconds) {
+    
+}
+
+void LeafParticleRender::render(Renderer2d *renderer) {
+    setShaderMat4(renderer->uniforms.model, model);
+
+    glBindBuffer(GL_ARRAY_BUFFER, vbo);
+    glBufferSubData(GL_ARRAY_BUFFER, 0, numVertices * sizeof(Renderer2dVertex), &vertices[0]);
+
+    glBindVertexArray(vao);
+    glDrawArraysInstanced(GL_TRIANGLES, 0, 6 * numVertices, numLeaves);
+    glBindVertexArray(0);
+}
+
+void LeafParticleRender::unload() {
+    glDeleteVertexArrays(1, &vao);
+    glDeleteBuffers(1, &vbo);
+    delete [] vertices;
+}
\ No newline at end of file
-- 
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