X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fgraphics%2Fshader.cpp;h=5540dea4ef4b9454279332d17e33435ee7aed1f5;hb=9da6ac5e93d79e79658a95d5f6efe42146873583;hp=f04b46f5f1eba30ca828d3fc6c92d4dbe5a73d94;hpb=a32b120a2c06d3c7ad6a217bc46bba9e76d75d93;p=blank.git

diff --git a/src/graphics/shader.cpp b/src/graphics/shader.cpp
index f04b46f..5540dea 100644
--- a/src/graphics/shader.cpp
+++ b/src/graphics/shader.cpp
@@ -4,8 +4,10 @@
 #include "PlainColor.hpp"
 #include "Program.hpp"
 #include "Shader.hpp"
+#include "SkyBoxShader.hpp"
 
 #include "ArrayTexture.hpp"
+#include "CubeMap.hpp"
 #include "Texture.hpp"
 #include "../app/init.hpp"
 
@@ -494,6 +496,77 @@ void BlendedSprite::SetBG(const glm::vec4 &v) noexcept {
 }
 
 
+SkyBoxShader::SkyBoxShader()
+: program()
+, vp(1.0f)
+, vp_handle(0)
+, sampler_handle(0) {
+	program.LoadShader(
+		GL_VERTEX_SHADER,
+		"#version 330 core\n"
+		"layout(location = 0) in vec3 vtx_position;\n"
+		"uniform mat4 VP;\n"
+		"out vec3 vtx_viewspace;\n"
+		"void main() {\n"
+			"gl_Position = VP * vec4(vtx_position, 1);\n"
+			"gl_Position.z = gl_Position.w;\n"
+			"vtx_viewspace = vtx_position;\n"
+		"}\n"
+	);
+	program.LoadShader(
+		GL_FRAGMENT_SHADER,
+		"#version 330 core\n"
+		"in vec3 vtx_viewspace;\n"
+		"uniform samplerCube tex_sampler;\n"
+		"out vec3 color;\n"
+		"void main() {\n"
+			"color = texture(tex_sampler, vtx_viewspace).rgb;\n"
+			//"color = vec3(1,0,0);\n"
+		"}\n"
+	);
+	program.Link();
+	if (!program.Linked()) {
+		program.Log(std::cerr);
+		throw std::runtime_error("link program");
+	}
+
+	vp_handle = program.UniformLocation("VP");
+	sampler_handle = program.UniformLocation("tex_sampler");
+}
+
+
+void SkyBoxShader::Activate() noexcept {
+	program.Use();
+}
+
+void SkyBoxShader::SetTexture(CubeMap &tex) noexcept {
+	glActiveTexture(GL_TEXTURE0);
+	tex.Bind();
+	program.Uniform(sampler_handle, GLint(0));
+}
+
+void SkyBoxShader::SetProjection(const glm::mat4 &p) noexcept {
+	projection = p;
+	vp = p * view;
+	program.Uniform(vp_handle, vp);
+}
+
+void SkyBoxShader::SetView(const glm::mat4 &v) noexcept {
+	view = v;
+	view[0].w = 0.0f;
+	view[1].w = 0.0f;
+	view[2].w = 0.0f;
+	view[3] = glm::vec4(0.0f, 0.0f, 0.0f, 1.0f);
+	vp = projection * view;
+	program.Uniform(vp_handle, vp);
+}
+
+void SkyBoxShader::SetVP(const glm::mat4 &v, const glm::mat4 &p) noexcept {
+	projection = p;
+	SetView(v);
+}
+
+
 PlainColor::PlainColor()
 : program()
 , vp(1.0f)